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/wp-includes/ -> load.php (source)

   1  <?php
   2  /**
   3   * These functions are needed to load WordPress.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Return the HTTP protocol sent by the server.
  10   *
  11   * @since 4.4.0
  12   *
  13   * @return string The HTTP protocol. Default: HTTP/1.0.
  14   */
  15  function wp_get_server_protocol() {
  16      $protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : '';
  17      if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0' ), true ) ) {
  18          $protocol = 'HTTP/1.0';
  19      }
  20      return $protocol;
  21  }
  22  
  23  /**
  24   * Fix `$_SERVER` variables for various setups.
  25   *
  26   * @since 3.0.0
  27   * @access private
  28   *
  29   * @global string $PHP_SELF The filename of the currently executing script,
  30   *                          relative to the document root.
  31   */
  32  function wp_fix_server_vars() {
  33      global $PHP_SELF;
  34  
  35      $default_server_values = array(
  36          'SERVER_SOFTWARE' => '',
  37          'REQUEST_URI'     => '',
  38      );
  39  
  40      $_SERVER = array_merge( $default_server_values, $_SERVER );
  41  
  42      // Fix for IIS when running with PHP ISAPI.
  43      if ( empty( $_SERVER['REQUEST_URI'] ) || ( 'cgi-fcgi' !== PHP_SAPI && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
  44  
  45          if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
  46              // IIS Mod-Rewrite.
  47              $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
  48          } elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
  49              // IIS Isapi_Rewrite.
  50              $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
  51          } else {
  52              // Use ORIG_PATH_INFO if there is no PATH_INFO.
  53              if ( ! isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) ) {
  54                  $_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
  55              }
  56  
  57              // Some IIS + PHP configurations put the script-name in the path-info (no need to append it twice).
  58              if ( isset( $_SERVER['PATH_INFO'] ) ) {
  59                  if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] ) {
  60                      $_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
  61                  } else {
  62                      $_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
  63                  }
  64              }
  65  
  66              // Append the query string if it exists and isn't null.
  67              if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
  68                  $_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
  69              }
  70          }
  71      }
  72  
  73      // Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests.
  74      if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && ( strpos( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) == strlen( $_SERVER['SCRIPT_FILENAME'] ) - 7 ) ) {
  75          $_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];
  76      }
  77  
  78      // Fix for Dreamhost and other PHP as CGI hosts.
  79      if ( strpos( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) !== false ) {
  80          unset( $_SERVER['PATH_INFO'] );
  81      }
  82  
  83      // Fix empty PHP_SELF.
  84      $PHP_SELF = $_SERVER['PHP_SELF'];
  85      if ( empty( $PHP_SELF ) ) {
  86          $_SERVER['PHP_SELF'] = preg_replace( '/(\?.*)?$/', '', $_SERVER['REQUEST_URI'] );
  87          $PHP_SELF            = $_SERVER['PHP_SELF'];
  88      }
  89  
  90      wp_populate_basic_auth_from_authorization_header();
  91  }
  92  
  93  /**
  94   * Populates the Basic Auth server details from the Authorization header.
  95   *
  96   * Some servers running in CGI or FastCGI mode don't pass the Authorization
  97   * header on to WordPress.  If it's been rewritten to the `HTTP_AUTHORIZATION` header,
  98   * fill in the proper $_SERVER variables instead.
  99   *
 100   * @since 5.6.0
 101   */
 102  function wp_populate_basic_auth_from_authorization_header() {
 103      // If we don't have anything to pull from, return early.
 104      if ( ! isset( $_SERVER['HTTP_AUTHORIZATION'] ) && ! isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {
 105          return;
 106      }
 107  
 108      // If either PHP_AUTH key is already set, do nothing.
 109      if ( isset( $_SERVER['PHP_AUTH_USER'] ) || isset( $_SERVER['PHP_AUTH_PW'] ) ) {
 110          return;
 111      }
 112  
 113      // From our prior conditional, one of these must be set.
 114      $header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
 115  
 116      // Test to make sure the pattern matches expected.
 117      if ( ! preg_match( '%^Basic [a-z\d/+]*={0,2}$%i', $header ) ) {
 118          return;
 119      }
 120  
 121      // Removing `Basic ` the token would start six characters in.
 122      $token    = substr( $header, 6 );
 123      $userpass = base64_decode( $token );
 124  
 125      list( $user, $pass ) = explode( ':', $userpass );
 126  
 127      // Now shove them in the proper keys where we're expecting later on.
 128      $_SERVER['PHP_AUTH_USER'] = $user;
 129      $_SERVER['PHP_AUTH_PW']   = $pass;
 130  }
 131  
 132  /**
 133   * Check for the required PHP version, and the MySQL extension or
 134   * a database drop-in.
 135   *
 136   * Dies if requirements are not met.
 137   *
 138   * @since 3.0.0
 139   * @access private
 140   *
 141   * @global string $required_php_version The required PHP version string.
 142   * @global string $wp_version           The WordPress version string.
 143   */
 144  function wp_check_php_mysql_versions() {
 145      global $required_php_version, $wp_version;
 146      $php_version = phpversion();
 147  
 148      if ( version_compare( $required_php_version, $php_version, '>' ) ) {
 149          $protocol = wp_get_server_protocol();
 150          header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );
 151          header( 'Content-Type: text/html; charset=utf-8' );
 152          printf( 'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.', $php_version, $wp_version, $required_php_version );
 153          exit( 1 );
 154      }
 155  
 156      if ( ! extension_loaded( 'mysql' ) && ! extension_loaded( 'mysqli' ) && ! extension_loaded( 'mysqlnd' )
 157          // This runs before default constants are defined, so we can't assume WP_CONTENT_DIR is set yet.
 158          && ( defined( 'WP_CONTENT_DIR' ) && ! file_exists( WP_CONTENT_DIR . '/db.php' )
 159              || ! file_exists( ABSPATH . 'wp-content/db.php' ) )
 160      ) {
 161          require_once  ABSPATH . WPINC . '/functions.php';
 162          wp_load_translations_early();
 163          $args = array(
 164              'exit' => false,
 165              'code' => 'mysql_not_found',
 166          );
 167          wp_die(
 168              __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ),
 169              __( 'Requirements Not Met' ),
 170              $args
 171          );
 172          exit( 1 );
 173      }
 174  }
 175  
 176  /**
 177   * Retrieves the current environment type.
 178   *
 179   * The type can be set via the `WP_ENVIRONMENT_TYPE` global system variable,
 180   * or a constant of the same name.
 181   *
 182   * Possible values are 'local', 'development', 'staging', and 'production'.
 183   * If not set, the type defaults to 'production'.
 184   *
 185   * @since 5.5.0
 186   * @since 5.5.1 Added the 'local' type.
 187   * @since 5.5.1 Removed the ability to alter the list of types.
 188   *
 189   * @return string The current environment type.
 190   */
 191  function wp_get_environment_type() {
 192      static $current_env = '';
 193  
 194      if ( $current_env ) {
 195          return $current_env;
 196      }
 197  
 198      $wp_environments = array(
 199          'local',
 200          'development',
 201          'staging',
 202          'production',
 203      );
 204  
 205      // Add a note about the deprecated WP_ENVIRONMENT_TYPES constant.
 206      if ( defined( 'WP_ENVIRONMENT_TYPES' ) && function_exists( '_deprecated_argument' ) ) {
 207          if ( function_exists( '__' ) ) {
 208              /* translators: %s: WP_ENVIRONMENT_TYPES */
 209              $message = sprintf( __( 'The %s constant is no longer supported.' ), 'WP_ENVIRONMENT_TYPES' );
 210          } else {
 211              $message = sprintf( 'The %s constant is no longer supported.', 'WP_ENVIRONMENT_TYPES' );
 212          }
 213  
 214          _deprecated_argument(
 215              'define()',
 216              '5.5.1',
 217              $message
 218          );
 219      }
 220  
 221      // Check if the environment variable has been set, if `getenv` is available on the system.
 222      if ( function_exists( 'getenv' ) ) {
 223          $has_env = getenv( 'WP_ENVIRONMENT_TYPE' );
 224          if ( false !== $has_env ) {
 225              $current_env = $has_env;
 226          }
 227      }
 228  
 229      // Fetch the environment from a constant, this overrides the global system variable.
 230      if ( defined( 'WP_ENVIRONMENT_TYPE' ) ) {
 231          $current_env = WP_ENVIRONMENT_TYPE;
 232      }
 233  
 234      // Make sure the environment is an allowed one, and not accidentally set to an invalid value.
 235      if ( ! in_array( $current_env, $wp_environments, true ) ) {
 236          $current_env = 'production';
 237      }
 238  
 239      return $current_env;
 240  }
 241  
 242  /**
 243   * Don't load all of WordPress when handling a favicon.ico request.
 244   *
 245   * Instead, send the headers for a zero-length favicon and bail.
 246   *
 247   * @since 3.0.0
 248   * @deprecated 5.4.0 Deprecated in favor of do_favicon().
 249   */
 250  function wp_favicon_request() {
 251      if ( '/favicon.ico' === $_SERVER['REQUEST_URI'] ) {
 252          header( 'Content-Type: image/vnd.microsoft.icon' );
 253          exit;
 254      }
 255  }
 256  
 257  /**
 258   * Die with a maintenance message when conditions are met.
 259   *
 260   * The default message can be replaced by using a drop-in (maintenance.php in
 261   * the wp-content directory).
 262   *
 263   * @since 3.0.0
 264   * @access private
 265   */
 266  function wp_maintenance() {
 267      // Return if maintenance mode is disabled.
 268      if ( ! wp_is_maintenance_mode() ) {
 269          return;
 270      }
 271  
 272      if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {
 273          require_once WP_CONTENT_DIR . '/maintenance.php';
 274          die();
 275      }
 276  
 277      require_once  ABSPATH . WPINC . '/functions.php';
 278      wp_load_translations_early();
 279  
 280      header( 'Retry-After: 600' );
 281  
 282      wp_die(
 283          __( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ),
 284          __( 'Maintenance' ),
 285          503
 286      );
 287  }
 288  
 289  /**
 290   * Check if maintenance mode is enabled.
 291   *
 292   * Checks for a file in the WordPress root directory named ".maintenance".
 293   * This file will contain the variable $upgrading, set to the time the file
 294   * was created. If the file was created less than 10 minutes ago, WordPress
 295   * is in maintenance mode.
 296   *
 297   * @since 5.5.0
 298   *
 299   * @global int $upgrading The Unix timestamp marking when upgrading WordPress began.
 300   *
 301   * @return bool True if maintenance mode is enabled, false otherwise.
 302   */
 303  function wp_is_maintenance_mode() {
 304      global $upgrading;
 305  
 306      if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) {
 307          return false;
 308      }
 309  
 310      require ABSPATH . '.maintenance';
 311      // If the $upgrading timestamp is older than 10 minutes, consider maintenance over.
 312      if ( ( time() - $upgrading ) >= 10 * MINUTE_IN_SECONDS ) {
 313          return false;
 314      }
 315  
 316      /**
 317       * Filters whether to enable maintenance mode.
 318       *
 319       * This filter runs before it can be used by plugins. It is designed for
 320       * non-web runtimes. If this filter returns true, maintenance mode will be
 321       * active and the request will end. If false, the request will be allowed to
 322       * continue processing even if maintenance mode should be active.
 323       *
 324       * @since 4.6.0
 325       *
 326       * @param bool $enable_checks Whether to enable maintenance mode. Default true.
 327       * @param int  $upgrading     The timestamp set in the .maintenance file.
 328       */
 329      if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) {
 330          return false;
 331      }
 332  
 333      return true;
 334  }
 335  
 336  /**
 337   * Get the time elapsed so far during this PHP script.
 338   *
 339   * Uses REQUEST_TIME_FLOAT that appeared in PHP 5.4.0.
 340   *
 341   * @since 5.8.0
 342   *
 343   * @return float Seconds since the PHP script started.
 344   */
 345  function timer_float() {
 346      return microtime( true ) - $_SERVER['REQUEST_TIME_FLOAT'];
 347  }
 348  
 349  /**
 350   * Start the WordPress micro-timer.
 351   *
 352   * @since 0.71
 353   * @access private
 354   *
 355   * @global float $timestart Unix timestamp set at the beginning of the page load.
 356   * @see timer_stop()
 357   *
 358   * @return bool Always returns true.
 359   */
 360  function timer_start() {
 361      global $timestart;
 362      $timestart = microtime( true );
 363      return true;
 364  }
 365  
 366  /**
 367   * Retrieve or display the time from the page start to when function is called.
 368   *
 369   * @since 0.71
 370   *
 371   * @global float   $timestart Seconds from when timer_start() is called.
 372   * @global float   $timeend   Seconds from when function is called.
 373   *
 374   * @param int|bool $display   Whether to echo or return the results. Accepts 0|false for return,
 375   *                            1|true for echo. Default 0|false.
 376   * @param int      $precision The number of digits from the right of the decimal to display.
 377   *                            Default 3.
 378   * @return string The "second.microsecond" finished time calculation. The number is formatted
 379   *                for human consumption, both localized and rounded.
 380   */
 381  function timer_stop( $display = 0, $precision = 3 ) {
 382      global $timestart, $timeend;
 383      $timeend   = microtime( true );
 384      $timetotal = $timeend - $timestart;
 385      $r         = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );
 386      if ( $display ) {
 387          echo $r;
 388      }
 389      return $r;
 390  }
 391  
 392  /**
 393   * Set PHP error reporting based on WordPress debug settings.
 394   *
 395   * Uses three constants: `WP_DEBUG`, `WP_DEBUG_DISPLAY`, and `WP_DEBUG_LOG`.
 396   * All three can be defined in wp-config.php. By default, `WP_DEBUG` and
 397   * `WP_DEBUG_LOG` are set to false, and `WP_DEBUG_DISPLAY` is set to true.
 398   *
 399   * When `WP_DEBUG` is true, all PHP notices are reported. WordPress will also
 400   * display internal notices: when a deprecated WordPress function, function
 401   * argument, or file is used. Deprecated code may be removed from a later
 402   * version.
 403   *
 404   * It is strongly recommended that plugin and theme developers use `WP_DEBUG`
 405   * in their development environments.
 406   *
 407   * `WP_DEBUG_DISPLAY` and `WP_DEBUG_LOG` perform no function unless `WP_DEBUG`
 408   * is true.
 409   *
 410   * When `WP_DEBUG_DISPLAY` is true, WordPress will force errors to be displayed.
 411   * `WP_DEBUG_DISPLAY` defaults to true. Defining it as null prevents WordPress
 412   * from changing the global configuration setting. Defining `WP_DEBUG_DISPLAY`
 413   * as false will force errors to be hidden.
 414   *
 415   * When `WP_DEBUG_LOG` is true, errors will be logged to `wp-content/debug.log`.
 416   * When `WP_DEBUG_LOG` is a valid path, errors will be logged to the specified file.
 417   *
 418   * Errors are never displayed for XML-RPC, REST, `ms-files.php`, and Ajax requests.
 419   *
 420   * @since 3.0.0
 421   * @since 5.1.0 `WP_DEBUG_LOG` can be a file path.
 422   * @access private
 423   */
 424  function wp_debug_mode() {
 425      /**
 426       * Filters whether to allow the debug mode check to occur.
 427       *
 428       * This filter runs before it can be used by plugins. It is designed for
 429       * non-web run-times. Returning false causes the `WP_DEBUG` and related
 430       * constants to not be checked and the default PHP values for errors
 431       * will be used unless you take care to update them yourself.
 432       *
 433       * To use this filter you must define a `$wp_filter` global before
 434       * WordPress loads, usually in `wp-config.php`.
 435       *
 436       * Example:
 437       *
 438       *     $GLOBALS['wp_filter'] = array(
 439       *         'enable_wp_debug_mode_checks' => array(
 440       *             10 => array(
 441       *                 array(
 442       *                     'accepted_args' => 0,
 443       *                     'function'      => function() {
 444       *                         return false;
 445       *                     },
 446       *                 ),
 447       *             ),
 448       *         ),
 449       *     );
 450       *
 451       * @since 4.6.0
 452       *
 453       * @param bool $enable_debug_mode Whether to enable debug mode checks to occur. Default true.
 454       */
 455      if ( ! apply_filters( 'enable_wp_debug_mode_checks', true ) ) {
 456          return;
 457      }
 458  
 459      if ( WP_DEBUG ) {
 460          error_reporting( E_ALL );
 461  
 462          if ( WP_DEBUG_DISPLAY ) {
 463              ini_set( 'display_errors', 1 );
 464          } elseif ( null !== WP_DEBUG_DISPLAY ) {
 465              ini_set( 'display_errors', 0 );
 466          }
 467  
 468          if ( in_array( strtolower( (string) WP_DEBUG_LOG ), array( 'true', '1' ), true ) ) {
 469              $log_path = WP_CONTENT_DIR . '/debug.log';
 470          } elseif ( is_string( WP_DEBUG_LOG ) ) {
 471              $log_path = WP_DEBUG_LOG;
 472          } else {
 473              $log_path = false;
 474          }
 475  
 476          if ( $log_path ) {
 477              ini_set( 'log_errors', 1 );
 478              ini_set( 'error_log', $log_path );
 479          }
 480      } else {
 481          error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR );
 482      }
 483  
 484      if (
 485          defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || defined( 'MS_FILES_REQUEST' ) ||
 486          ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) ||
 487          wp_doing_ajax() || wp_is_json_request() ) {
 488          ini_set( 'display_errors', 0 );
 489      }
 490  }
 491  
 492  /**
 493   * Set the location of the language directory.
 494   *
 495   * To set directory manually, define the `WP_LANG_DIR` constant
 496   * in wp-config.php.
 497   *
 498   * If the language directory exists within `WP_CONTENT_DIR`, it
 499   * is used. Otherwise the language directory is assumed to live
 500   * in `WPINC`.
 501   *
 502   * @since 3.0.0
 503   * @access private
 504   */
 505  function wp_set_lang_dir() {
 506      if ( ! defined( 'WP_LANG_DIR' ) ) {
 507          if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) || ! @is_dir( ABSPATH . WPINC . '/languages' ) ) {
 508              /**
 509               * Server path of the language directory.
 510               *
 511               * No leading slash, no trailing slash, full path, not relative to ABSPATH
 512               *
 513               * @since 2.1.0
 514               */
 515              define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' );
 516              if ( ! defined( 'LANGDIR' ) ) {
 517                  // Old static relative path maintained for limited backward compatibility - won't work in some cases.
 518                  define( 'LANGDIR', 'wp-content/languages' );
 519              }
 520          } else {
 521              /**
 522               * Server path of the language directory.
 523               *
 524               * No leading slash, no trailing slash, full path, not relative to `ABSPATH`.
 525               *
 526               * @since 2.1.0
 527               */
 528              define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' );
 529              if ( ! defined( 'LANGDIR' ) ) {
 530                  // Old relative path maintained for backward compatibility.
 531                  define( 'LANGDIR', WPINC . '/languages' );
 532              }
 533          }
 534      }
 535  }
 536  
 537  /**
 538   * Load the database class file and instantiate the `$wpdb` global.
 539   *
 540   * @since 2.5.0
 541   *
 542   * @global wpdb $wpdb WordPress database abstraction object.
 543   */
 544  function require_wp_db() {
 545      global $wpdb;
 546  
 547      require_once  ABSPATH . WPINC . '/wp-db.php';
 548      if ( file_exists( WP_CONTENT_DIR . '/db.php' ) ) {
 549          require_once WP_CONTENT_DIR . '/db.php';
 550      }
 551  
 552      if ( isset( $wpdb ) ) {
 553          return;
 554      }
 555  
 556      $dbuser     = defined( 'DB_USER' ) ? DB_USER : '';
 557      $dbpassword = defined( 'DB_PASSWORD' ) ? DB_PASSWORD : '';
 558      $dbname     = defined( 'DB_NAME' ) ? DB_NAME : '';
 559      $dbhost     = defined( 'DB_HOST' ) ? DB_HOST : '';
 560  
 561      $wpdb = new wpdb( $dbuser, $dbpassword, $dbname, $dbhost );
 562  }
 563  
 564  /**
 565   * Set the database table prefix and the format specifiers for database
 566   * table columns.
 567   *
 568   * Columns not listed here default to `%s`.
 569   *
 570   * @since 3.0.0
 571   * @access private
 572   *
 573   * @global wpdb   $wpdb         WordPress database abstraction object.
 574   * @global string $table_prefix The database table prefix.
 575   */
 576  function wp_set_wpdb_vars() {
 577      global $wpdb, $table_prefix;
 578      if ( ! empty( $wpdb->error ) ) {
 579          dead_db();
 580      }
 581  
 582      $wpdb->field_types = array(
 583          'post_author'      => '%d',
 584          'post_parent'      => '%d',
 585          'menu_order'       => '%d',
 586          'term_id'          => '%d',
 587          'term_group'       => '%d',
 588          'term_taxonomy_id' => '%d',
 589          'parent'           => '%d',
 590          'count'            => '%d',
 591          'object_id'        => '%d',
 592          'term_order'       => '%d',
 593          'ID'               => '%d',
 594          'comment_ID'       => '%d',
 595          'comment_post_ID'  => '%d',
 596          'comment_parent'   => '%d',
 597          'user_id'          => '%d',
 598          'link_id'          => '%d',
 599          'link_owner'       => '%d',
 600          'link_rating'      => '%d',
 601          'option_id'        => '%d',
 602          'blog_id'          => '%d',
 603          'meta_id'          => '%d',
 604          'post_id'          => '%d',
 605          'user_status'      => '%d',
 606          'umeta_id'         => '%d',
 607          'comment_karma'    => '%d',
 608          'comment_count'    => '%d',
 609          // Multisite:
 610          'active'           => '%d',
 611          'cat_id'           => '%d',
 612          'deleted'          => '%d',
 613          'lang_id'          => '%d',
 614          'mature'           => '%d',
 615          'public'           => '%d',
 616          'site_id'          => '%d',
 617          'spam'             => '%d',
 618      );
 619  
 620      $prefix = $wpdb->set_prefix( $table_prefix );
 621  
 622      if ( is_wp_error( $prefix ) ) {
 623          wp_load_translations_early();
 624          wp_die(
 625              sprintf(
 626                  /* translators: 1: $table_prefix, 2: wp-config.php */
 627                  __( '<strong>Error</strong>: %1$s in %2$s can only contain numbers, letters, and underscores.' ),
 628                  '<code>$table_prefix</code>',
 629                  '<code>wp-config.php</code>'
 630              )
 631          );
 632      }
 633  }
 634  
 635  /**
 636   * Toggle `$_wp_using_ext_object_cache` on and off without directly
 637   * touching global.
 638   *
 639   * @since 3.7.0
 640   *
 641   * @global bool $_wp_using_ext_object_cache
 642   *
 643   * @param bool $using Whether external object cache is being used.
 644   * @return bool The current 'using' setting.
 645   */
 646  function wp_using_ext_object_cache( $using = null ) {
 647      global $_wp_using_ext_object_cache;
 648      $current_using = $_wp_using_ext_object_cache;
 649      if ( null !== $using ) {
 650          $_wp_using_ext_object_cache = $using;
 651      }
 652      return $current_using;
 653  }
 654  
 655  /**
 656   * Start the WordPress object cache.
 657   *
 658   * If an object-cache.php file exists in the wp-content directory,
 659   * it uses that drop-in as an external object cache.
 660   *
 661   * @since 3.0.0
 662   * @access private
 663   *
 664   * @global array $wp_filter Stores all of the filters.
 665   */
 666  function wp_start_object_cache() {
 667      global $wp_filter;
 668      static $first_init = true;
 669  
 670      // Only perform the following checks once.
 671  
 672      /**
 673       * Filters whether to enable loading of the object-cache.php drop-in.
 674       *
 675       * This filter runs before it can be used by plugins. It is designed for non-web
 676       * run-times. If false is returned, object-cache.php will never be loaded.
 677       *
 678       * @since 5.8.0
 679       *
 680       * @param bool $enable_object_cache Whether to enable loading object-cache.php (if present).
 681       *                                  Default true.
 682       */
 683      if ( $first_init && apply_filters( 'enable_loading_object_cache_dropin', true ) ) {
 684          if ( ! function_exists( 'wp_cache_init' ) ) {
 685              /*
 686               * This is the normal situation. First-run of this function. No
 687               * caching backend has been loaded.
 688               *
 689               * We try to load a custom caching backend, and then, if it
 690               * results in a wp_cache_init() function existing, we note
 691               * that an external object cache is being used.
 692               */
 693              if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 694                  require_once WP_CONTENT_DIR . '/object-cache.php';
 695                  if ( function_exists( 'wp_cache_init' ) ) {
 696                      wp_using_ext_object_cache( true );
 697                  }
 698  
 699                  // Re-initialize any hooks added manually by object-cache.php.
 700                  if ( $wp_filter ) {
 701                      $wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
 702                  }
 703              }
 704          } elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 705              /*
 706               * Sometimes advanced-cache.php can load object-cache.php before
 707               * this function is run. This breaks the function_exists() check
 708               * above and can result in wp_using_ext_object_cache() returning
 709               * false when actually an external cache is in use.
 710               */
 711              wp_using_ext_object_cache( true );
 712          }
 713      }
 714  
 715      if ( ! wp_using_ext_object_cache() ) {
 716          require_once  ABSPATH . WPINC . '/cache.php';
 717      }
 718  
 719      require_once  ABSPATH . WPINC . '/cache-compat.php';
 720  
 721      /*
 722       * If cache supports reset, reset instead of init if already
 723       * initialized. Reset signals to the cache that global IDs
 724       * have changed and it may need to update keys and cleanup caches.
 725       */
 726      if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) ) {
 727          wp_cache_switch_to_blog( get_current_blog_id() );
 728      } elseif ( function_exists( 'wp_cache_init' ) ) {
 729          wp_cache_init();
 730      }
 731  
 732      if ( function_exists( 'wp_cache_add_global_groups' ) ) {
 733          wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'useremail', 'userslugs', 'site-transient', 'site-options', 'blog-lookup', 'blog-details', 'site-details', 'rss', 'global-posts', 'blog-id-cache', 'networks', 'sites', 'blog_meta' ) );
 734          wp_cache_add_non_persistent_groups( array( 'counts', 'plugins' ) );
 735      }
 736  
 737      $first_init = false;
 738  }
 739  
 740  /**
 741   * Redirect to the installer if WordPress is not installed.
 742   *
 743   * Dies with an error message when Multisite is enabled.
 744   *
 745   * @since 3.0.0
 746   * @access private
 747   */
 748  function wp_not_installed() {
 749      if ( is_multisite() ) {
 750          if ( ! is_blog_installed() && ! wp_installing() ) {
 751              nocache_headers();
 752  
 753              wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );
 754          }
 755      } elseif ( ! is_blog_installed() && ! wp_installing() ) {
 756          nocache_headers();
 757  
 758          require  ABSPATH . WPINC . '/kses.php';
 759          require  ABSPATH . WPINC . '/pluggable.php';
 760  
 761          $link = wp_guess_url() . '/wp-admin/install.php';
 762  
 763          wp_redirect( $link );
 764          die();
 765      }
 766  }
 767  
 768  /**
 769   * Retrieve an array of must-use plugin files.
 770   *
 771   * The default directory is wp-content/mu-plugins. To change the default
 772   * directory manually, define `WPMU_PLUGIN_DIR` and `WPMU_PLUGIN_URL`
 773   * in wp-config.php.
 774   *
 775   * @since 3.0.0
 776   * @access private
 777   *
 778   * @return string[] Array of absolute paths of files to include.
 779   */
 780  function wp_get_mu_plugins() {
 781      $mu_plugins = array();
 782      if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
 783          return $mu_plugins;
 784      }
 785      $dh = opendir( WPMU_PLUGIN_DIR );
 786      if ( ! $dh ) {
 787          return $mu_plugins;
 788      }
 789      while ( ( $plugin = readdir( $dh ) ) !== false ) {
 790          if ( '.php' === substr( $plugin, -4 ) ) {
 791              $mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
 792          }
 793      }
 794      closedir( $dh );
 795      sort( $mu_plugins );
 796  
 797      return $mu_plugins;
 798  }
 799  
 800  /**
 801   * Retrieve an array of active and valid plugin files.
 802   *
 803   * While upgrading or installing WordPress, no plugins are returned.
 804   *
 805   * The default directory is `wp-content/plugins`. To change the default
 806   * directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL`
 807   * in `wp-config.php`.
 808   *
 809   * @since 3.0.0
 810   * @access private
 811   *
 812   * @return string[] Array of paths to plugin files relative to the plugins directory.
 813   */
 814  function wp_get_active_and_valid_plugins() {
 815      $plugins        = array();
 816      $active_plugins = (array) get_option( 'active_plugins', array() );
 817  
 818      // Check for hacks file if the option is enabled.
 819      if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) {
 820          _deprecated_file( 'my-hacks.php', '1.5.0' );
 821          array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
 822      }
 823  
 824      if ( empty( $active_plugins ) || wp_installing() ) {
 825          return $plugins;
 826      }
 827  
 828      $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
 829  
 830      foreach ( $active_plugins as $plugin ) {
 831          if ( ! validate_file( $plugin )                     // $plugin must validate as file.
 832              && '.php' === substr( $plugin, -4 )             // $plugin must end with '.php'.
 833              && file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
 834              // Not already included as a network plugin.
 835              && ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins, true ) )
 836              ) {
 837              $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
 838          }
 839      }
 840  
 841      /*
 842       * Remove plugins from the list of active plugins when we're on an endpoint
 843       * that should be protected against WSODs and the plugin is paused.
 844       */
 845      if ( wp_is_recovery_mode() ) {
 846          $plugins = wp_skip_paused_plugins( $plugins );
 847      }
 848  
 849      return $plugins;
 850  }
 851  
 852  /**
 853   * Filters a given list of plugins, removing any paused plugins from it.
 854   *
 855   * @since 5.2.0
 856   *
 857   * @param string[] $plugins Array of absolute plugin main file paths.
 858   * @return string[] Filtered array of plugins, without any paused plugins.
 859   */
 860  function wp_skip_paused_plugins( array $plugins ) {
 861      $paused_plugins = wp_paused_plugins()->get_all();
 862  
 863      if ( empty( $paused_plugins ) ) {
 864          return $plugins;
 865      }
 866  
 867      foreach ( $plugins as $index => $plugin ) {
 868          list( $plugin ) = explode( '/', plugin_basename( $plugin ) );
 869  
 870          if ( array_key_exists( $plugin, $paused_plugins ) ) {
 871              unset( $plugins[ $index ] );
 872  
 873              // Store list of paused plugins for displaying an admin notice.
 874              $GLOBALS['_paused_plugins'][ $plugin ] = $paused_plugins[ $plugin ];
 875          }
 876      }
 877  
 878      return $plugins;
 879  }
 880  
 881  /**
 882   * Retrieves an array of active and valid themes.
 883   *
 884   * While upgrading or installing WordPress, no themes are returned.
 885   *
 886   * @since 5.1.0
 887   * @access private
 888   *
 889   * @return string[] Array of absolute paths to theme directories.
 890   */
 891  function wp_get_active_and_valid_themes() {
 892      global $pagenow;
 893  
 894      $themes = array();
 895  
 896      if ( wp_installing() && 'wp-activate.php' !== $pagenow ) {
 897          return $themes;
 898      }
 899  
 900      if ( TEMPLATEPATH !== STYLESHEETPATH ) {
 901          $themes[] = STYLESHEETPATH;
 902      }
 903  
 904      $themes[] = TEMPLATEPATH;
 905  
 906      /*
 907       * Remove themes from the list of active themes when we're on an endpoint
 908       * that should be protected against WSODs and the theme is paused.
 909       */
 910      if ( wp_is_recovery_mode() ) {
 911          $themes = wp_skip_paused_themes( $themes );
 912  
 913          // If no active and valid themes exist, skip loading themes.
 914          if ( empty( $themes ) ) {
 915              add_filter( 'wp_using_themes', '__return_false' );
 916          }
 917      }
 918  
 919      return $themes;
 920  }
 921  
 922  /**
 923   * Filters a given list of themes, removing any paused themes from it.
 924   *
 925   * @since 5.2.0
 926   *
 927   * @param string[] $themes Array of absolute theme directory paths.
 928   * @return string[] Filtered array of absolute paths to themes, without any paused themes.
 929   */
 930  function wp_skip_paused_themes( array $themes ) {
 931      $paused_themes = wp_paused_themes()->get_all();
 932  
 933      if ( empty( $paused_themes ) ) {
 934          return $themes;
 935      }
 936  
 937      foreach ( $themes as $index => $theme ) {
 938          $theme = basename( $theme );
 939  
 940          if ( array_key_exists( $theme, $paused_themes ) ) {
 941              unset( $themes[ $index ] );
 942  
 943              // Store list of paused themes for displaying an admin notice.
 944              $GLOBALS['_paused_themes'][ $theme ] = $paused_themes[ $theme ];
 945          }
 946      }
 947  
 948      return $themes;
 949  }
 950  
 951  /**
 952   * Is WordPress in Recovery Mode.
 953   *
 954   * In this mode, plugins or themes that cause WSODs will be paused.
 955   *
 956   * @since 5.2.0
 957   *
 958   * @return bool
 959   */
 960  function wp_is_recovery_mode() {
 961      return wp_recovery_mode()->is_active();
 962  }
 963  
 964  /**
 965   * Determines whether we are currently on an endpoint that should be protected against WSODs.
 966   *
 967   * @since 5.2.0
 968   *
 969   * @global string $pagenow
 970   *
 971   * @return bool True if the current endpoint should be protected.
 972   */
 973  function is_protected_endpoint() {
 974      // Protect login pages.
 975      if ( isset( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) {
 976          return true;
 977      }
 978  
 979      // Protect the admin backend.
 980      if ( is_admin() && ! wp_doing_ajax() ) {
 981          return true;
 982      }
 983  
 984      // Protect Ajax actions that could help resolve a fatal error should be available.
 985      if ( is_protected_ajax_action() ) {
 986          return true;
 987      }
 988  
 989      /**
 990       * Filters whether the current request is against a protected endpoint.
 991       *
 992       * This filter is only fired when an endpoint is requested which is not already protected by
 993       * WordPress core. As such, it exclusively allows providing further protected endpoints in
 994       * addition to the admin backend, login pages and protected Ajax actions.
 995       *
 996       * @since 5.2.0
 997       *
 998       * @param bool $is_protected_endpoint Whether the currently requested endpoint is protected.
 999       *                                    Default false.
1000       */
1001      return (bool) apply_filters( 'is_protected_endpoint', false );
1002  }
1003  
1004  /**
1005   * Determines whether we are currently handling an Ajax action that should be protected against WSODs.
1006   *
1007   * @since 5.2.0
1008   *
1009   * @return bool True if the current Ajax action should be protected.
1010   */
1011  function is_protected_ajax_action() {
1012      if ( ! wp_doing_ajax() ) {
1013          return false;
1014      }
1015  
1016      if ( ! isset( $_REQUEST['action'] ) ) {
1017          return false;
1018      }
1019  
1020      $actions_to_protect = array(
1021          'edit-theme-plugin-file', // Saving changes in the core code editor.
1022          'heartbeat',              // Keep the heart beating.
1023          'install-plugin',         // Installing a new plugin.
1024          'install-theme',          // Installing a new theme.
1025          'search-plugins',         // Searching in the list of plugins.
1026          'search-install-plugins', // Searching for a plugin in the plugin install screen.
1027          'update-plugin',          // Update an existing plugin.
1028          'update-theme',           // Update an existing theme.
1029      );
1030  
1031      /**
1032       * Filters the array of protected Ajax actions.
1033       *
1034       * This filter is only fired when doing Ajax and the Ajax request has an 'action' property.
1035       *
1036       * @since 5.2.0
1037       *
1038       * @param string[] $actions_to_protect Array of strings with Ajax actions to protect.
1039       */
1040      $actions_to_protect = (array) apply_filters( 'wp_protected_ajax_actions', $actions_to_protect );
1041  
1042      if ( ! in_array( $_REQUEST['action'], $actions_to_protect, true ) ) {
1043          return false;
1044      }
1045  
1046      return true;
1047  }
1048  
1049  /**
1050   * Set internal encoding.
1051   *
1052   * In most cases the default internal encoding is latin1, which is
1053   * of no use, since we want to use the `mb_` functions for `utf-8` strings.
1054   *
1055   * @since 3.0.0
1056   * @access private
1057   */
1058  function wp_set_internal_encoding() {
1059      if ( function_exists( 'mb_internal_encoding' ) ) {
1060          $charset = get_option( 'blog_charset' );
1061          // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
1062          if ( ! $charset || ! @mb_internal_encoding( $charset ) ) {
1063              mb_internal_encoding( 'UTF-8' );
1064          }
1065      }
1066  }
1067  
1068  /**
1069   * Add magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`.
1070   *
1071   * Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`,
1072   * `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly.
1073   *
1074   * @since 3.0.0
1075   * @access private
1076   */
1077  function wp_magic_quotes() {
1078      // Escape with wpdb.
1079      $_GET    = add_magic_quotes( $_GET );
1080      $_POST   = add_magic_quotes( $_POST );
1081      $_COOKIE = add_magic_quotes( $_COOKIE );
1082      $_SERVER = add_magic_quotes( $_SERVER );
1083  
1084      // Force REQUEST to be GET + POST.
1085      $_REQUEST = array_merge( $_GET, $_POST );
1086  }
1087  
1088  /**
1089   * Runs just before PHP shuts down execution.
1090   *
1091   * @since 1.2.0
1092   * @access private
1093   */
1094  function shutdown_action_hook() {
1095      /**
1096       * Fires just before PHP shuts down execution.
1097       *
1098       * @since 1.2.0
1099       */
1100      do_action( 'shutdown' );
1101  
1102      wp_cache_close();
1103  }
1104  
1105  /**
1106   * Copy an object.
1107   *
1108   * @since 2.7.0
1109   * @deprecated 3.2.0
1110   *
1111   * @param object $object The object to clone.
1112   * @return object The cloned object.
1113   */
1114  function wp_clone( $object ) {
1115      // Use parens for clone to accommodate PHP 4. See #17880.
1116      return clone( $object );
1117  }
1118  
1119  /**
1120   * Determines whether the current request is for an administrative interface page.
1121   *
1122   * Does not check if the user is an administrator; use current_user_can()
1123   * for checking roles and capabilities.
1124   *
1125   * For more information on this and similar theme functions, check out
1126   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1127   * Conditional Tags} article in the Theme Developer Handbook.
1128   *
1129   * @since 1.5.1
1130   *
1131   * @global WP_Screen $current_screen WordPress current screen object.
1132   *
1133   * @return bool True if inside WordPress administration interface, false otherwise.
1134   */
1135  function is_admin() {
1136      if ( isset( $GLOBALS['current_screen'] ) ) {
1137          return $GLOBALS['current_screen']->in_admin();
1138      } elseif ( defined( 'WP_ADMIN' ) ) {
1139          return WP_ADMIN;
1140      }
1141  
1142      return false;
1143  }
1144  
1145  /**
1146   * Whether the current request is for a site's administrative interface.
1147   *
1148   * e.g. `/wp-admin/`
1149   *
1150   * Does not check if the user is an administrator; use current_user_can()
1151   * for checking roles and capabilities.
1152   *
1153   * @since 3.1.0
1154   *
1155   * @global WP_Screen $current_screen WordPress current screen object.
1156   *
1157   * @return bool True if inside WordPress blog administration pages.
1158   */
1159  function is_blog_admin() {
1160      if ( isset( $GLOBALS['current_screen'] ) ) {
1161          return $GLOBALS['current_screen']->in_admin( 'site' );
1162      } elseif ( defined( 'WP_BLOG_ADMIN' ) ) {
1163          return WP_BLOG_ADMIN;
1164      }
1165  
1166      return false;
1167  }
1168  
1169  /**
1170   * Whether the current request is for the network administrative interface.
1171   *
1172   * e.g. `/wp-admin/network/`
1173   *
1174   * Does not check if the user is an administrator; use current_user_can()
1175   * for checking roles and capabilities.
1176   *
1177   * Does not check if the site is a Multisite network; use is_multisite()
1178   * for checking if Multisite is enabled.
1179   *
1180   * @since 3.1.0
1181   *
1182   * @global WP_Screen $current_screen WordPress current screen object.
1183   *
1184   * @return bool True if inside WordPress network administration pages.
1185   */
1186  function is_network_admin() {
1187      if ( isset( $GLOBALS['current_screen'] ) ) {
1188          return $GLOBALS['current_screen']->in_admin( 'network' );
1189      } elseif ( defined( 'WP_NETWORK_ADMIN' ) ) {
1190          return WP_NETWORK_ADMIN;
1191      }
1192  
1193      return false;
1194  }
1195  
1196  /**
1197   * Whether the current request is for a user admin screen.
1198   *
1199   * e.g. `/wp-admin/user/`
1200   *
1201   * Does not check if the user is an administrator; use current_user_can()
1202   * for checking roles and capabilities.
1203   *
1204   * @since 3.1.0
1205   *
1206   * @global WP_Screen $current_screen WordPress current screen object.
1207   *
1208   * @return bool True if inside WordPress user administration pages.
1209   */
1210  function is_user_admin() {
1211      if ( isset( $GLOBALS['current_screen'] ) ) {
1212          return $GLOBALS['current_screen']->in_admin( 'user' );
1213      } elseif ( defined( 'WP_USER_ADMIN' ) ) {
1214          return WP_USER_ADMIN;
1215      }
1216  
1217      return false;
1218  }
1219  
1220  /**
1221   * If Multisite is enabled.
1222   *
1223   * @since 3.0.0
1224   *
1225   * @return bool True if Multisite is enabled, false otherwise.
1226   */
1227  function is_multisite() {
1228      if ( defined( 'MULTISITE' ) ) {
1229          return MULTISITE;
1230      }
1231  
1232      if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) ) {
1233          return true;
1234      }
1235  
1236      return false;
1237  }
1238  
1239  /**
1240   * Retrieve the current site ID.
1241   *
1242   * @since 3.1.0
1243   *
1244   * @global int $blog_id
1245   *
1246   * @return int Site ID.
1247   */
1248  function get_current_blog_id() {
1249      global $blog_id;
1250      return absint( $blog_id );
1251  }
1252  
1253  /**
1254   * Retrieves the current network ID.
1255   *
1256   * @since 4.6.0
1257   *
1258   * @return int The ID of the current network.
1259   */
1260  function get_current_network_id() {
1261      if ( ! is_multisite() ) {
1262          return 1;
1263      }
1264  
1265      $current_network = get_network();
1266  
1267      if ( ! isset( $current_network->id ) ) {
1268          return get_main_network_id();
1269      }
1270  
1271      return absint( $current_network->id );
1272  }
1273  
1274  /**
1275   * Attempt an early load of translations.
1276   *
1277   * Used for errors encountered during the initial loading process, before
1278   * the locale has been properly detected and loaded.
1279   *
1280   * Designed for unusual load sequences (like setup-config.php) or for when
1281   * the script will then terminate with an error, otherwise there is a risk
1282   * that a file can be double-included.
1283   *
1284   * @since 3.4.0
1285   * @access private
1286   *
1287   * @global WP_Locale $wp_locale WordPress date and time locale object.
1288   */
1289  function wp_load_translations_early() {
1290      global $wp_locale;
1291  
1292      static $loaded = false;
1293      if ( $loaded ) {
1294          return;
1295      }
1296      $loaded = true;
1297  
1298      if ( function_exists( 'did_action' ) && did_action( 'init' ) ) {
1299          return;
1300      }
1301  
1302      // We need $wp_local_package.
1303      require  ABSPATH . WPINC . '/version.php';
1304  
1305      // Translation and localization.
1306      require_once  ABSPATH . WPINC . '/pomo/mo.php';
1307      require_once  ABSPATH . WPINC . '/l10n.php';
1308      require_once  ABSPATH . WPINC . '/class-wp-locale.php';
1309      require_once  ABSPATH . WPINC . '/class-wp-locale-switcher.php';
1310  
1311      // General libraries.
1312      require_once  ABSPATH . WPINC . '/plugin.php';
1313  
1314      $locales   = array();
1315      $locations = array();
1316  
1317      while ( true ) {
1318          if ( defined( 'WPLANG' ) ) {
1319              if ( '' === WPLANG ) {
1320                  break;
1321              }
1322              $locales[] = WPLANG;
1323          }
1324  
1325          if ( isset( $wp_local_package ) ) {
1326              $locales[] = $wp_local_package;
1327          }
1328  
1329          if ( ! $locales ) {
1330              break;
1331          }
1332  
1333          if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) ) {
1334              $locations[] = WP_LANG_DIR;
1335          }
1336  
1337          if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) {
1338              $locations[] = WP_CONTENT_DIR . '/languages';
1339          }
1340  
1341          if ( @is_dir( ABSPATH . 'wp-content/languages' ) ) {
1342              $locations[] = ABSPATH . 'wp-content/languages';
1343          }
1344  
1345          if ( @is_dir( ABSPATH . WPINC . '/languages' ) ) {
1346              $locations[] = ABSPATH . WPINC . '/languages';
1347          }
1348  
1349          if ( ! $locations ) {
1350              break;
1351          }
1352  
1353          $locations = array_unique( $locations );
1354  
1355          foreach ( $locales as $locale ) {
1356              foreach ( $locations as $location ) {
1357                  if ( file_exists( $location . '/' . $locale . '.mo' ) ) {
1358                      load_textdomain( 'default', $location . '/' . $locale . '.mo' );
1359                      if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) ) {
1360                          load_textdomain( 'default', $location . '/admin-' . $locale . '.mo' );
1361                      }
1362                      break 2;
1363                  }
1364              }
1365          }
1366  
1367          break;
1368      }
1369  
1370      $wp_locale = new WP_Locale();
1371  }
1372  
1373  /**
1374   * Check or set whether WordPress is in "installation" mode.
1375   *
1376   * If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`.
1377   *
1378   * @since 4.4.0
1379   *
1380   * @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off.
1381   *                            Omit this parameter if you only want to fetch the current status.
1382   * @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will
1383   *              report whether WP was in installing mode prior to the change to `$is_installing`.
1384   */
1385  function wp_installing( $is_installing = null ) {
1386      static $installing = null;
1387  
1388      // Support for the `WP_INSTALLING` constant, defined before WP is loaded.
1389      if ( is_null( $installing ) ) {
1390          $installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
1391      }
1392  
1393      if ( ! is_null( $is_installing ) ) {
1394          $old_installing = $installing;
1395          $installing     = $is_installing;
1396          return (bool) $old_installing;
1397      }
1398  
1399      return (bool) $installing;
1400  }
1401  
1402  /**
1403   * Determines if SSL is used.
1404   *
1405   * @since 2.6.0
1406   * @since 4.6.0 Moved from functions.php to load.php.
1407   *
1408   * @return bool True if SSL, otherwise false.
1409   */
1410  function is_ssl() {
1411      if ( isset( $_SERVER['HTTPS'] ) ) {
1412          if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
1413              return true;
1414          }
1415  
1416          if ( '1' == $_SERVER['HTTPS'] ) {
1417              return true;
1418          }
1419      } elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
1420          return true;
1421      }
1422      return false;
1423  }
1424  
1425  /**
1426   * Converts a shorthand byte value to an integer byte value.
1427   *
1428   * @since 2.3.0
1429   * @since 4.6.0 Moved from media.php to load.php.
1430   *
1431   * @link https://www.php.net/manual/en/function.ini-get.php
1432   * @link https://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
1433   *
1434   * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
1435   * @return int An integer byte value.
1436   */
1437  function wp_convert_hr_to_bytes( $value ) {
1438      $value = strtolower( trim( $value ) );
1439      $bytes = (int) $value;
1440  
1441      if ( false !== strpos( $value, 'g' ) ) {
1442          $bytes *= GB_IN_BYTES;
1443      } elseif ( false !== strpos( $value, 'm' ) ) {
1444          $bytes *= MB_IN_BYTES;
1445      } elseif ( false !== strpos( $value, 'k' ) ) {
1446          $bytes *= KB_IN_BYTES;
1447      }
1448  
1449      // Deal with large (float) values which run into the maximum integer size.
1450      return min( $bytes, PHP_INT_MAX );
1451  }
1452  
1453  /**
1454   * Determines whether a PHP ini value is changeable at runtime.
1455   *
1456   * @since 4.6.0
1457   *
1458   * @link https://www.php.net/manual/en/function.ini-get-all.php
1459   *
1460   * @param string $setting The name of the ini setting to check.
1461   * @return bool True if the value is changeable at runtime. False otherwise.
1462   */
1463  function wp_is_ini_value_changeable( $setting ) {
1464      static $ini_all;
1465  
1466      if ( ! isset( $ini_all ) ) {
1467          $ini_all = false;
1468          // Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
1469          if ( function_exists( 'ini_get_all' ) ) {
1470              $ini_all = ini_get_all();
1471          }
1472      }
1473  
1474      // Bit operator to workaround https://bugs.php.net/bug.php?id=44936 which changes access level to 63 in PHP 5.2.6 - 5.2.17.
1475      if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) ) ) {
1476          return true;
1477      }
1478  
1479      // If we were unable to retrieve the details, fail gracefully to assume it's changeable.
1480      if ( ! is_array( $ini_all ) ) {
1481          return true;
1482      }
1483  
1484      return false;
1485  }
1486  
1487  /**
1488   * Determines whether the current request is a WordPress Ajax request.
1489   *
1490   * @since 4.7.0
1491   *
1492   * @return bool True if it's a WordPress Ajax request, false otherwise.
1493   */
1494  function wp_doing_ajax() {
1495      /**
1496       * Filters whether the current request is a WordPress Ajax request.
1497       *
1498       * @since 4.7.0
1499       *
1500       * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request.
1501       */
1502      return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
1503  }
1504  
1505  /**
1506   * Determines whether the current request should use themes.
1507   *
1508   * @since 5.1.0
1509   *
1510   * @return bool True if themes should be used, false otherwise.
1511   */
1512  function wp_using_themes() {
1513      /**
1514       * Filters whether the current request should use themes.
1515       *
1516       * @since 5.1.0
1517       *
1518       * @param bool $wp_using_themes Whether the current request should use themes.
1519       */
1520      return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES );
1521  }
1522  
1523  /**
1524   * Determines whether the current request is a WordPress cron request.
1525   *
1526   * @since 4.8.0
1527   *
1528   * @return bool True if it's a WordPress cron request, false otherwise.
1529   */
1530  function wp_doing_cron() {
1531      /**
1532       * Filters whether the current request is a WordPress cron request.
1533       *
1534       * @since 4.8.0
1535       *
1536       * @param bool $wp_doing_cron Whether the current request is a WordPress cron request.
1537       */
1538      return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON );
1539  }
1540  
1541  /**
1542   * Checks whether the given variable is a WordPress Error.
1543   *
1544   * Returns whether `$thing` is an instance of the `WP_Error` class.
1545   *
1546   * @since 2.1.0
1547   *
1548   * @param mixed $thing The variable to check.
1549   * @return bool Whether the variable is an instance of WP_Error.
1550   */
1551  function is_wp_error( $thing ) {
1552      $is_wp_error = ( $thing instanceof WP_Error );
1553  
1554      if ( $is_wp_error ) {
1555          /**
1556           * Fires when `is_wp_error()` is called and its parameter is an instance of `WP_Error`.
1557           *
1558           * @since 5.6.0
1559           *
1560           * @param WP_Error $thing The error object passed to `is_wp_error()`.
1561           */
1562          do_action( 'is_wp_error_instance', $thing );
1563      }
1564  
1565      return $is_wp_error;
1566  }
1567  
1568  /**
1569   * Determines whether file modifications are allowed.
1570   *
1571   * @since 4.8.0
1572   *
1573   * @param string $context The usage context.
1574   * @return bool True if file modification is allowed, false otherwise.
1575   */
1576  function wp_is_file_mod_allowed( $context ) {
1577      /**
1578       * Filters whether file modifications are allowed.
1579       *
1580       * @since 4.8.0
1581       *
1582       * @param bool   $file_mod_allowed Whether file modifications are allowed.
1583       * @param string $context          The usage context.
1584       */
1585      return apply_filters( 'file_mod_allowed', ! defined( 'DISALLOW_FILE_MODS' ) || ! DISALLOW_FILE_MODS, $context );
1586  }
1587  
1588  /**
1589   * Start scraping edited file errors.
1590   *
1591   * @since 4.9.0
1592   */
1593  function wp_start_scraping_edited_file_errors() {
1594      if ( ! isset( $_REQUEST['wp_scrape_key'] ) || ! isset( $_REQUEST['wp_scrape_nonce'] ) ) {
1595          return;
1596      }
1597      $key   = substr( sanitize_key( wp_unslash( $_REQUEST['wp_scrape_key'] ) ), 0, 32 );
1598      $nonce = wp_unslash( $_REQUEST['wp_scrape_nonce'] );
1599  
1600      if ( get_transient( 'scrape_key_' . $key ) !== $nonce ) {
1601          echo "###### wp_scraping_result_start:$key ######";
1602          echo wp_json_encode(
1603              array(
1604                  'code'    => 'scrape_nonce_failure',
1605                  'message' => __( 'Scrape key check failed. Please try again.' ),
1606              )
1607          );
1608          echo "###### wp_scraping_result_end:$key ######";
1609          die();
1610      }
1611      if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
1612          define( 'WP_SANDBOX_SCRAPING', true );
1613      }
1614      register_shutdown_function( 'wp_finalize_scraping_edited_file_errors', $key );
1615  }
1616  
1617  /**
1618   * Finalize scraping for edited file errors.
1619   *
1620   * @since 4.9.0
1621   *
1622   * @param string $scrape_key Scrape key.
1623   */
1624  function wp_finalize_scraping_edited_file_errors( $scrape_key ) {
1625      $error = error_get_last();
1626      echo "\n###### wp_scraping_result_start:$scrape_key ######\n";
1627      if ( ! empty( $error ) && in_array( $error['type'], array( E_CORE_ERROR, E_COMPILE_ERROR, E_ERROR, E_PARSE, E_USER_ERROR, E_RECOVERABLE_ERROR ), true ) ) {
1628          $error = str_replace( ABSPATH, '', $error );
1629          echo wp_json_encode( $error );
1630      } else {
1631          echo wp_json_encode( true );
1632      }
1633      echo "\n###### wp_scraping_result_end:$scrape_key ######\n";
1634  }
1635  
1636  /**
1637   * Checks whether current request is a JSON request, or is expecting a JSON response.
1638   *
1639   * @since 5.0.0
1640   *
1641   * @return bool True if `Accepts` or `Content-Type` headers contain `application/json`.
1642   *              False otherwise.
1643   */
1644  function wp_is_json_request() {
1645  
1646      if ( isset( $_SERVER['HTTP_ACCEPT'] ) && wp_is_json_media_type( $_SERVER['HTTP_ACCEPT'] ) ) {
1647          return true;
1648      }
1649  
1650      if ( isset( $_SERVER['CONTENT_TYPE'] ) && wp_is_json_media_type( $_SERVER['CONTENT_TYPE'] ) ) {
1651          return true;
1652      }
1653  
1654      return false;
1655  
1656  }
1657  
1658  /**
1659   * Checks whether current request is a JSONP request, or is expecting a JSONP response.
1660   *
1661   * @since 5.2.0
1662   *
1663   * @return bool True if JSONP request, false otherwise.
1664   */
1665  function wp_is_jsonp_request() {
1666      if ( ! isset( $_GET['_jsonp'] ) ) {
1667          return false;
1668      }
1669  
1670      if ( ! function_exists( 'wp_check_jsonp_callback' ) ) {
1671          require_once  ABSPATH . WPINC . '/functions.php';
1672      }
1673  
1674      $jsonp_callback = $_GET['_jsonp'];
1675      if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) {
1676          return false;
1677      }
1678  
1679      /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
1680      $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );
1681  
1682      return $jsonp_enabled;
1683  
1684  }
1685  
1686  /**
1687   * Checks whether a string is a valid JSON Media Type.
1688   *
1689   * @since 5.6.0
1690   *
1691   * @param string $media_type A Media Type string to check.
1692   * @return bool True if string is a valid JSON Media Type.
1693   */
1694  function wp_is_json_media_type( $media_type ) {
1695      static $cache = array();
1696  
1697      if ( ! isset( $cache[ $media_type ] ) ) {
1698          $cache[ $media_type ] = (bool) preg_match( '/(^|\s|,)application\/([\w!#\$&-\^\.\+]+\+)?json(\+oembed)?($|\s|;|,)/i', $media_type );
1699      }
1700  
1701      return $cache[ $media_type ];
1702  }
1703  
1704  /**
1705   * Checks whether current request is an XML request, or is expecting an XML response.
1706   *
1707   * @since 5.2.0
1708   *
1709   * @return bool True if `Accepts` or `Content-Type` headers contain `text/xml`
1710   *              or one of the related MIME types. False otherwise.
1711   */
1712  function wp_is_xml_request() {
1713      $accepted = array(
1714          'text/xml',
1715          'application/rss+xml',
1716          'application/atom+xml',
1717          'application/rdf+xml',
1718          'text/xml+oembed',
1719          'application/xml+oembed',
1720      );
1721  
1722      if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) {
1723          foreach ( $accepted as $type ) {
1724              if ( false !== strpos( $_SERVER['HTTP_ACCEPT'], $type ) ) {
1725                  return true;
1726              }
1727          }
1728      }
1729  
1730      if ( isset( $_SERVER['CONTENT_TYPE'] ) && in_array( $_SERVER['CONTENT_TYPE'], $accepted, true ) ) {
1731          return true;
1732      }
1733  
1734      return false;
1735  }
1736  
1737  /**
1738   * Checks if this site is protected by HTTP Basic Auth.
1739   *
1740   * At the moment, this merely checks for the present of Basic Auth credentials. Therefore, calling
1741   * this function with a context different from the current context may give inaccurate results.
1742   * In a future release, this evaluation may be made more robust.
1743   *
1744   * Currently, this is only used by Application Passwords to prevent a conflict since it also utilizes
1745   * Basic Auth.
1746   *
1747   * @since 5.6.1
1748   *
1749   * @global string $pagenow The current page.
1750   *
1751   * @param string $context The context to check for protection. Accepts 'login', 'admin', and 'front'.
1752   *                        Defaults to the current context.
1753   * @return bool Whether the site is protected by Basic Auth.
1754   */
1755  function wp_is_site_protected_by_basic_auth( $context = '' ) {
1756      global $pagenow;
1757  
1758      if ( ! $context ) {
1759          if ( 'wp-login.php' === $pagenow ) {
1760              $context = 'login';
1761          } elseif ( is_admin() ) {
1762              $context = 'admin';
1763          } else {
1764              $context = 'front';
1765          }
1766      }
1767  
1768      $is_protected = ! empty( $_SERVER['PHP_AUTH_USER'] ) || ! empty( $_SERVER['PHP_AUTH_PW'] );
1769  
1770      /**
1771       * Filters whether a site is protected by HTTP Basic Auth.
1772       *
1773       * @since 5.6.1
1774       *
1775       * @param bool $is_protected Whether the site is protected by Basic Auth.
1776       * @param string $context    The context to check for protection. One of 'login', 'admin', or 'front'.
1777       */
1778      return apply_filters( 'wp_is_site_protected_by_basic_auth', $is_protected, $context );
1779  }


Generated: Tue Sep 21 01:00:05 2021 Cross-referenced by PHPXref 0.7.1