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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, 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 ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) || wp_doing_ajax() || wp_is_json_request() ) {
 485          ini_set( 'display_errors', 0 );
 486      }
 487  }
 488  
 489  /**
 490   * Set the location of the language directory.
 491   *
 492   * To set directory manually, define the `WP_LANG_DIR` constant
 493   * in wp-config.php.
 494   *
 495   * If the language directory exists within `WP_CONTENT_DIR`, it
 496   * is used. Otherwise the language directory is assumed to live
 497   * in `WPINC`.
 498   *
 499   * @since 3.0.0
 500   * @access private
 501   */
 502  function wp_set_lang_dir() {
 503      if ( ! defined( 'WP_LANG_DIR' ) ) {
 504          if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) || ! @is_dir( ABSPATH . WPINC . '/languages' ) ) {
 505              /**
 506               * Server path of the language directory.
 507               *
 508               * No leading slash, no trailing slash, full path, not relative to ABSPATH
 509               *
 510               * @since 2.1.0
 511               */
 512              define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' );
 513              if ( ! defined( 'LANGDIR' ) ) {
 514                  // Old static relative path maintained for limited backward compatibility - won't work in some cases.
 515                  define( 'LANGDIR', 'wp-content/languages' );
 516              }
 517          } else {
 518              /**
 519               * Server path of the language directory.
 520               *
 521               * No leading slash, no trailing slash, full path, not relative to `ABSPATH`.
 522               *
 523               * @since 2.1.0
 524               */
 525              define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' );
 526              if ( ! defined( 'LANGDIR' ) ) {
 527                  // Old relative path maintained for backward compatibility.
 528                  define( 'LANGDIR', WPINC . '/languages' );
 529              }
 530          }
 531      }
 532  }
 533  
 534  /**
 535   * Load the database class file and instantiate the `$wpdb` global.
 536   *
 537   * @since 2.5.0
 538   *
 539   * @global wpdb $wpdb WordPress database abstraction object.
 540   */
 541  function require_wp_db() {
 542      global $wpdb;
 543  
 544      require_once  ABSPATH . WPINC . '/wp-db.php';
 545      if ( file_exists( WP_CONTENT_DIR . '/db.php' ) ) {
 546          require_once WP_CONTENT_DIR . '/db.php';
 547      }
 548  
 549      if ( isset( $wpdb ) ) {
 550          return;
 551      }
 552  
 553      $dbuser     = defined( 'DB_USER' ) ? DB_USER : '';
 554      $dbpassword = defined( 'DB_PASSWORD' ) ? DB_PASSWORD : '';
 555      $dbname     = defined( 'DB_NAME' ) ? DB_NAME : '';
 556      $dbhost     = defined( 'DB_HOST' ) ? DB_HOST : '';
 557  
 558      $wpdb = new wpdb( $dbuser, $dbpassword, $dbname, $dbhost );
 559  }
 560  
 561  /**
 562   * Set the database table prefix and the format specifiers for database
 563   * table columns.
 564   *
 565   * Columns not listed here default to `%s`.
 566   *
 567   * @since 3.0.0
 568   * @access private
 569   *
 570   * @global wpdb   $wpdb         WordPress database abstraction object.
 571   * @global string $table_prefix The database table prefix.
 572   */
 573  function wp_set_wpdb_vars() {
 574      global $wpdb, $table_prefix;
 575      if ( ! empty( $wpdb->error ) ) {
 576          dead_db();
 577      }
 578  
 579      $wpdb->field_types = array(
 580          'post_author'      => '%d',
 581          'post_parent'      => '%d',
 582          'menu_order'       => '%d',
 583          'term_id'          => '%d',
 584          'term_group'       => '%d',
 585          'term_taxonomy_id' => '%d',
 586          'parent'           => '%d',
 587          'count'            => '%d',
 588          'object_id'        => '%d',
 589          'term_order'       => '%d',
 590          'ID'               => '%d',
 591          'comment_ID'       => '%d',
 592          'comment_post_ID'  => '%d',
 593          'comment_parent'   => '%d',
 594          'user_id'          => '%d',
 595          'link_id'          => '%d',
 596          'link_owner'       => '%d',
 597          'link_rating'      => '%d',
 598          'option_id'        => '%d',
 599          'blog_id'          => '%d',
 600          'meta_id'          => '%d',
 601          'post_id'          => '%d',
 602          'user_status'      => '%d',
 603          'umeta_id'         => '%d',
 604          'comment_karma'    => '%d',
 605          'comment_count'    => '%d',
 606          // Multisite:
 607          'active'           => '%d',
 608          'cat_id'           => '%d',
 609          'deleted'          => '%d',
 610          'lang_id'          => '%d',
 611          'mature'           => '%d',
 612          'public'           => '%d',
 613          'site_id'          => '%d',
 614          'spam'             => '%d',
 615      );
 616  
 617      $prefix = $wpdb->set_prefix( $table_prefix );
 618  
 619      if ( is_wp_error( $prefix ) ) {
 620          wp_load_translations_early();
 621          wp_die(
 622              sprintf(
 623                  /* translators: 1: $table_prefix, 2: wp-config.php */
 624                  __( '<strong>Error</strong>: %1$s in %2$s can only contain numbers, letters, and underscores.' ),
 625                  '<code>$table_prefix</code>',
 626                  '<code>wp-config.php</code>'
 627              )
 628          );
 629      }
 630  }
 631  
 632  /**
 633   * Toggle `$_wp_using_ext_object_cache` on and off without directly
 634   * touching global.
 635   *
 636   * @since 3.7.0
 637   *
 638   * @global bool $_wp_using_ext_object_cache
 639   *
 640   * @param bool $using Whether external object cache is being used.
 641   * @return bool The current 'using' setting.
 642   */
 643  function wp_using_ext_object_cache( $using = null ) {
 644      global $_wp_using_ext_object_cache;
 645      $current_using = $_wp_using_ext_object_cache;
 646      if ( null !== $using ) {
 647          $_wp_using_ext_object_cache = $using;
 648      }
 649      return $current_using;
 650  }
 651  
 652  /**
 653   * Start the WordPress object cache.
 654   *
 655   * If an object-cache.php file exists in the wp-content directory,
 656   * it uses that drop-in as an external object cache.
 657   *
 658   * @since 3.0.0
 659   * @access private
 660   *
 661   * @global array $wp_filter Stores all of the filters.
 662   */
 663  function wp_start_object_cache() {
 664      global $wp_filter;
 665      static $first_init = true;
 666  
 667      // Only perform the following checks once.
 668      if ( $first_init ) {
 669          if ( ! function_exists( 'wp_cache_init' ) ) {
 670              /*
 671               * This is the normal situation. First-run of this function. No
 672               * caching backend has been loaded.
 673               *
 674               * We try to load a custom caching backend, and then, if it
 675               * results in a wp_cache_init() function existing, we note
 676               * that an external object cache is being used.
 677               */
 678              if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 679                  require_once WP_CONTENT_DIR . '/object-cache.php';
 680                  if ( function_exists( 'wp_cache_init' ) ) {
 681                      wp_using_ext_object_cache( true );
 682                  }
 683  
 684                  // Re-initialize any hooks added manually by object-cache.php.
 685                  if ( $wp_filter ) {
 686                      $wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
 687                  }
 688              }
 689          } elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 690              /*
 691               * Sometimes advanced-cache.php can load object-cache.php before
 692               * this function is run. This breaks the function_exists() check
 693               * above and can result in wp_using_ext_object_cache() returning
 694               * false when actually an external cache is in use.
 695               */
 696              wp_using_ext_object_cache( true );
 697          }
 698      }
 699  
 700      if ( ! wp_using_ext_object_cache() ) {
 701          require_once  ABSPATH . WPINC . '/cache.php';
 702      }
 703  
 704      require_once  ABSPATH . WPINC . '/cache-compat.php';
 705  
 706      /*
 707       * If cache supports reset, reset instead of init if already
 708       * initialized. Reset signals to the cache that global IDs
 709       * have changed and it may need to update keys and cleanup caches.
 710       */
 711      if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) ) {
 712          wp_cache_switch_to_blog( get_current_blog_id() );
 713      } elseif ( function_exists( 'wp_cache_init' ) ) {
 714          wp_cache_init();
 715      }
 716  
 717      if ( function_exists( 'wp_cache_add_global_groups' ) ) {
 718          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' ) );
 719          wp_cache_add_non_persistent_groups( array( 'counts', 'plugins' ) );
 720      }
 721  
 722      $first_init = false;
 723  }
 724  
 725  /**
 726   * Redirect to the installer if WordPress is not installed.
 727   *
 728   * Dies with an error message when Multisite is enabled.
 729   *
 730   * @since 3.0.0
 731   * @access private
 732   */
 733  function wp_not_installed() {
 734      if ( is_multisite() ) {
 735          if ( ! is_blog_installed() && ! wp_installing() ) {
 736              nocache_headers();
 737  
 738              wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );
 739          }
 740      } elseif ( ! is_blog_installed() && ! wp_installing() ) {
 741          nocache_headers();
 742  
 743          require  ABSPATH . WPINC . '/kses.php';
 744          require  ABSPATH . WPINC . '/pluggable.php';
 745  
 746          $link = wp_guess_url() . '/wp-admin/install.php';
 747  
 748          wp_redirect( $link );
 749          die();
 750      }
 751  }
 752  
 753  /**
 754   * Retrieve an array of must-use plugin files.
 755   *
 756   * The default directory is wp-content/mu-plugins. To change the default
 757   * directory manually, define `WPMU_PLUGIN_DIR` and `WPMU_PLUGIN_URL`
 758   * in wp-config.php.
 759   *
 760   * @since 3.0.0
 761   * @access private
 762   *
 763   * @return string[] Array of absolute paths of files to include.
 764   */
 765  function wp_get_mu_plugins() {
 766      $mu_plugins = array();
 767      if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
 768          return $mu_plugins;
 769      }
 770      $dh = opendir( WPMU_PLUGIN_DIR );
 771      if ( ! $dh ) {
 772          return $mu_plugins;
 773      }
 774      while ( ( $plugin = readdir( $dh ) ) !== false ) {
 775          if ( '.php' === substr( $plugin, -4 ) ) {
 776              $mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
 777          }
 778      }
 779      closedir( $dh );
 780      sort( $mu_plugins );
 781  
 782      return $mu_plugins;
 783  }
 784  
 785  /**
 786   * Retrieve an array of active and valid plugin files.
 787   *
 788   * While upgrading or installing WordPress, no plugins are returned.
 789   *
 790   * The default directory is `wp-content/plugins`. To change the default
 791   * directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL`
 792   * in `wp-config.php`.
 793   *
 794   * @since 3.0.0
 795   * @access private
 796   *
 797   * @return string[] Array of paths to plugin files relative to the plugins directory.
 798   */
 799  function wp_get_active_and_valid_plugins() {
 800      $plugins        = array();
 801      $active_plugins = (array) get_option( 'active_plugins', array() );
 802  
 803      // Check for hacks file if the option is enabled.
 804      if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) {
 805          _deprecated_file( 'my-hacks.php', '1.5.0' );
 806          array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
 807      }
 808  
 809      if ( empty( $active_plugins ) || wp_installing() ) {
 810          return $plugins;
 811      }
 812  
 813      $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
 814  
 815      foreach ( $active_plugins as $plugin ) {
 816          if ( ! validate_file( $plugin )                     // $plugin must validate as file.
 817              && '.php' === substr( $plugin, -4 )             // $plugin must end with '.php'.
 818              && file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
 819              // Not already included as a network plugin.
 820              && ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins, true ) )
 821              ) {
 822              $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
 823          }
 824      }
 825  
 826      /*
 827       * Remove plugins from the list of active plugins when we're on an endpoint
 828       * that should be protected against WSODs and the plugin is paused.
 829       */
 830      if ( wp_is_recovery_mode() ) {
 831          $plugins = wp_skip_paused_plugins( $plugins );
 832      }
 833  
 834      return $plugins;
 835  }
 836  
 837  /**
 838   * Filters a given list of plugins, removing any paused plugins from it.
 839   *
 840   * @since 5.2.0
 841   *
 842   * @param string[] $plugins Array of absolute plugin main file paths.
 843   * @return string[] Filtered array of plugins, without any paused plugins.
 844   */
 845  function wp_skip_paused_plugins( array $plugins ) {
 846      $paused_plugins = wp_paused_plugins()->get_all();
 847  
 848      if ( empty( $paused_plugins ) ) {
 849          return $plugins;
 850      }
 851  
 852      foreach ( $plugins as $index => $plugin ) {
 853          list( $plugin ) = explode( '/', plugin_basename( $plugin ) );
 854  
 855          if ( array_key_exists( $plugin, $paused_plugins ) ) {
 856              unset( $plugins[ $index ] );
 857  
 858              // Store list of paused plugins for displaying an admin notice.
 859              $GLOBALS['_paused_plugins'][ $plugin ] = $paused_plugins[ $plugin ];
 860          }
 861      }
 862  
 863      return $plugins;
 864  }
 865  
 866  /**
 867   * Retrieves an array of active and valid themes.
 868   *
 869   * While upgrading or installing WordPress, no themes are returned.
 870   *
 871   * @since 5.1.0
 872   * @access private
 873   *
 874   * @return string[] Array of absolute paths to theme directories.
 875   */
 876  function wp_get_active_and_valid_themes() {
 877      global $pagenow;
 878  
 879      $themes = array();
 880  
 881      if ( wp_installing() && 'wp-activate.php' !== $pagenow ) {
 882          return $themes;
 883      }
 884  
 885      if ( TEMPLATEPATH !== STYLESHEETPATH ) {
 886          $themes[] = STYLESHEETPATH;
 887      }
 888  
 889      $themes[] = TEMPLATEPATH;
 890  
 891      /*
 892       * Remove themes from the list of active themes when we're on an endpoint
 893       * that should be protected against WSODs and the theme is paused.
 894       */
 895      if ( wp_is_recovery_mode() ) {
 896          $themes = wp_skip_paused_themes( $themes );
 897  
 898          // If no active and valid themes exist, skip loading themes.
 899          if ( empty( $themes ) ) {
 900              add_filter( 'wp_using_themes', '__return_false' );
 901          }
 902      }
 903  
 904      return $themes;
 905  }
 906  
 907  /**
 908   * Filters a given list of themes, removing any paused themes from it.
 909   *
 910   * @since 5.2.0
 911   *
 912   * @param string[] $themes Array of absolute theme directory paths.
 913   * @return string[] Filtered array of absolute paths to themes, without any paused themes.
 914   */
 915  function wp_skip_paused_themes( array $themes ) {
 916      $paused_themes = wp_paused_themes()->get_all();
 917  
 918      if ( empty( $paused_themes ) ) {
 919          return $themes;
 920      }
 921  
 922      foreach ( $themes as $index => $theme ) {
 923          $theme = basename( $theme );
 924  
 925          if ( array_key_exists( $theme, $paused_themes ) ) {
 926              unset( $themes[ $index ] );
 927  
 928              // Store list of paused themes for displaying an admin notice.
 929              $GLOBALS['_paused_themes'][ $theme ] = $paused_themes[ $theme ];
 930          }
 931      }
 932  
 933      return $themes;
 934  }
 935  
 936  /**
 937   * Is WordPress in Recovery Mode.
 938   *
 939   * In this mode, plugins or themes that cause WSODs will be paused.
 940   *
 941   * @since 5.2.0
 942   *
 943   * @return bool
 944   */
 945  function wp_is_recovery_mode() {
 946      return wp_recovery_mode()->is_active();
 947  }
 948  
 949  /**
 950   * Determines whether we are currently on an endpoint that should be protected against WSODs.
 951   *
 952   * @since 5.2.0
 953   *
 954   * @global string $pagenow
 955   *
 956   * @return bool True if the current endpoint should be protected.
 957   */
 958  function is_protected_endpoint() {
 959      // Protect login pages.
 960      if ( isset( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) {
 961          return true;
 962      }
 963  
 964      // Protect the admin backend.
 965      if ( is_admin() && ! wp_doing_ajax() ) {
 966          return true;
 967      }
 968  
 969      // Protect Ajax actions that could help resolve a fatal error should be available.
 970      if ( is_protected_ajax_action() ) {
 971          return true;
 972      }
 973  
 974      /**
 975       * Filters whether the current request is against a protected endpoint.
 976       *
 977       * This filter is only fired when an endpoint is requested which is not already protected by
 978       * WordPress core. As such, it exclusively allows providing further protected endpoints in
 979       * addition to the admin backend, login pages and protected Ajax actions.
 980       *
 981       * @since 5.2.0
 982       *
 983       * @param bool $is_protected_endpoint Whether the currently requested endpoint is protected.
 984       *                                    Default false.
 985       */
 986      return (bool) apply_filters( 'is_protected_endpoint', false );
 987  }
 988  
 989  /**
 990   * Determines whether we are currently handling an Ajax action that should be protected against WSODs.
 991   *
 992   * @since 5.2.0
 993   *
 994   * @return bool True if the current Ajax action should be protected.
 995   */
 996  function is_protected_ajax_action() {
 997      if ( ! wp_doing_ajax() ) {
 998          return false;
 999      }
1000  
1001      if ( ! isset( $_REQUEST['action'] ) ) {
1002          return false;
1003      }
1004  
1005      $actions_to_protect = array(
1006          'edit-theme-plugin-file', // Saving changes in the core code editor.
1007          'heartbeat',              // Keep the heart beating.
1008          'install-plugin',         // Installing a new plugin.
1009          'install-theme',          // Installing a new theme.
1010          'search-plugins',         // Searching in the list of plugins.
1011          'search-install-plugins', // Searching for a plugin in the plugin install screen.
1012          'update-plugin',          // Update an existing plugin.
1013          'update-theme',           // Update an existing theme.
1014      );
1015  
1016      /**
1017       * Filters the array of protected Ajax actions.
1018       *
1019       * This filter is only fired when doing Ajax and the Ajax request has an 'action' property.
1020       *
1021       * @since 5.2.0
1022       *
1023       * @param string[] $actions_to_protect Array of strings with Ajax actions to protect.
1024       */
1025      $actions_to_protect = (array) apply_filters( 'wp_protected_ajax_actions', $actions_to_protect );
1026  
1027      if ( ! in_array( $_REQUEST['action'], $actions_to_protect, true ) ) {
1028          return false;
1029      }
1030  
1031      return true;
1032  }
1033  
1034  /**
1035   * Set internal encoding.
1036   *
1037   * In most cases the default internal encoding is latin1, which is
1038   * of no use, since we want to use the `mb_` functions for `utf-8` strings.
1039   *
1040   * @since 3.0.0
1041   * @access private
1042   */
1043  function wp_set_internal_encoding() {
1044      if ( function_exists( 'mb_internal_encoding' ) ) {
1045          $charset = get_option( 'blog_charset' );
1046          // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
1047          if ( ! $charset || ! @mb_internal_encoding( $charset ) ) {
1048              mb_internal_encoding( 'UTF-8' );
1049          }
1050      }
1051  }
1052  
1053  /**
1054   * Add magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`.
1055   *
1056   * Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`,
1057   * `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly.
1058   *
1059   * @since 3.0.0
1060   * @access private
1061   */
1062  function wp_magic_quotes() {
1063      // Escape with wpdb.
1064      $_GET    = add_magic_quotes( $_GET );
1065      $_POST   = add_magic_quotes( $_POST );
1066      $_COOKIE = add_magic_quotes( $_COOKIE );
1067      $_SERVER = add_magic_quotes( $_SERVER );
1068  
1069      // Force REQUEST to be GET + POST.
1070      $_REQUEST = array_merge( $_GET, $_POST );
1071  }
1072  
1073  /**
1074   * Runs just before PHP shuts down execution.
1075   *
1076   * @since 1.2.0
1077   * @access private
1078   */
1079  function shutdown_action_hook() {
1080      /**
1081       * Fires just before PHP shuts down execution.
1082       *
1083       * @since 1.2.0
1084       */
1085      do_action( 'shutdown' );
1086  
1087      wp_cache_close();
1088  }
1089  
1090  /**
1091   * Copy an object.
1092   *
1093   * @since 2.7.0
1094   * @deprecated 3.2.0
1095   *
1096   * @param object $object The object to clone.
1097   * @return object The cloned object.
1098   */
1099  function wp_clone( $object ) {
1100      // Use parens for clone to accommodate PHP 4. See #17880.
1101      return clone( $object );
1102  }
1103  
1104  /**
1105   * Determines whether the current request is for an administrative interface page.
1106   *
1107   * Does not check if the user is an administrator; use current_user_can()
1108   * for checking roles and capabilities.
1109   *
1110   * For more information on this and similar theme functions, check out
1111   * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
1112   * Conditional Tags} article in the Theme Developer Handbook.
1113   *
1114   * @since 1.5.1
1115   *
1116   * @global WP_Screen $current_screen WordPress current screen object.
1117   *
1118   * @return bool True if inside WordPress administration interface, false otherwise.
1119   */
1120  function is_admin() {
1121      if ( isset( $GLOBALS['current_screen'] ) ) {
1122          return $GLOBALS['current_screen']->in_admin();
1123      } elseif ( defined( 'WP_ADMIN' ) ) {
1124          return WP_ADMIN;
1125      }
1126  
1127      return false;
1128  }
1129  
1130  /**
1131   * Whether the current request is for a site's administrative interface.
1132   *
1133   * e.g. `/wp-admin/`
1134   *
1135   * Does not check if the user is an administrator; use current_user_can()
1136   * for checking roles and capabilities.
1137   *
1138   * @since 3.1.0
1139   *
1140   * @global WP_Screen $current_screen WordPress current screen object.
1141   *
1142   * @return bool True if inside WordPress blog administration pages.
1143   */
1144  function is_blog_admin() {
1145      if ( isset( $GLOBALS['current_screen'] ) ) {
1146          return $GLOBALS['current_screen']->in_admin( 'site' );
1147      } elseif ( defined( 'WP_BLOG_ADMIN' ) ) {
1148          return WP_BLOG_ADMIN;
1149      }
1150  
1151      return false;
1152  }
1153  
1154  /**
1155   * Whether the current request is for the network administrative interface.
1156   *
1157   * e.g. `/wp-admin/network/`
1158   *
1159   * Does not check if the user is an administrator; use current_user_can()
1160   * for checking roles and capabilities.
1161   *
1162   * Does not check if the site is a Multisite network; use is_multisite()
1163   * for checking if Multisite is enabled.
1164   *
1165   * @since 3.1.0
1166   *
1167   * @global WP_Screen $current_screen WordPress current screen object.
1168   *
1169   * @return bool True if inside WordPress network administration pages.
1170   */
1171  function is_network_admin() {
1172      if ( isset( $GLOBALS['current_screen'] ) ) {
1173          return $GLOBALS['current_screen']->in_admin( 'network' );
1174      } elseif ( defined( 'WP_NETWORK_ADMIN' ) ) {
1175          return WP_NETWORK_ADMIN;
1176      }
1177  
1178      return false;
1179  }
1180  
1181  /**
1182   * Whether the current request is for a user admin screen.
1183   *
1184   * e.g. `/wp-admin/user/`
1185   *
1186   * Does not check if the user is an administrator; use current_user_can()
1187   * for checking roles and capabilities.
1188   *
1189   * @since 3.1.0
1190   *
1191   * @global WP_Screen $current_screen WordPress current screen object.
1192   *
1193   * @return bool True if inside WordPress user administration pages.
1194   */
1195  function is_user_admin() {
1196      if ( isset( $GLOBALS['current_screen'] ) ) {
1197          return $GLOBALS['current_screen']->in_admin( 'user' );
1198      } elseif ( defined( 'WP_USER_ADMIN' ) ) {
1199          return WP_USER_ADMIN;
1200      }
1201  
1202      return false;
1203  }
1204  
1205  /**
1206   * If Multisite is enabled.
1207   *
1208   * @since 3.0.0
1209   *
1210   * @return bool True if Multisite is enabled, false otherwise.
1211   */
1212  function is_multisite() {
1213      if ( defined( 'MULTISITE' ) ) {
1214          return MULTISITE;
1215      }
1216  
1217      if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) ) {
1218          return true;
1219      }
1220  
1221      return false;
1222  }
1223  
1224  /**
1225   * Retrieve the current site ID.
1226   *
1227   * @since 3.1.0
1228   *
1229   * @global int $blog_id
1230   *
1231   * @return int Site ID.
1232   */
1233  function get_current_blog_id() {
1234      global $blog_id;
1235      return absint( $blog_id );
1236  }
1237  
1238  /**
1239   * Retrieves the current network ID.
1240   *
1241   * @since 4.6.0
1242   *
1243   * @return int The ID of the current network.
1244   */
1245  function get_current_network_id() {
1246      if ( ! is_multisite() ) {
1247          return 1;
1248      }
1249  
1250      $current_network = get_network();
1251  
1252      if ( ! isset( $current_network->id ) ) {
1253          return get_main_network_id();
1254      }
1255  
1256      return absint( $current_network->id );
1257  }
1258  
1259  /**
1260   * Attempt an early load of translations.
1261   *
1262   * Used for errors encountered during the initial loading process, before
1263   * the locale has been properly detected and loaded.
1264   *
1265   * Designed for unusual load sequences (like setup-config.php) or for when
1266   * the script will then terminate with an error, otherwise there is a risk
1267   * that a file can be double-included.
1268   *
1269   * @since 3.4.0
1270   * @access private
1271   *
1272   * @global WP_Locale $wp_locale WordPress date and time locale object.
1273   */
1274  function wp_load_translations_early() {
1275      global $wp_locale;
1276  
1277      static $loaded = false;
1278      if ( $loaded ) {
1279          return;
1280      }
1281      $loaded = true;
1282  
1283      if ( function_exists( 'did_action' ) && did_action( 'init' ) ) {
1284          return;
1285      }
1286  
1287      // We need $wp_local_package.
1288      require  ABSPATH . WPINC . '/version.php';
1289  
1290      // Translation and localization.
1291      require_once  ABSPATH . WPINC . '/pomo/mo.php';
1292      require_once  ABSPATH . WPINC . '/l10n.php';
1293      require_once  ABSPATH . WPINC . '/class-wp-locale.php';
1294      require_once  ABSPATH . WPINC . '/class-wp-locale-switcher.php';
1295  
1296      // General libraries.
1297      require_once  ABSPATH . WPINC . '/plugin.php';
1298  
1299      $locales   = array();
1300      $locations = array();
1301  
1302      while ( true ) {
1303          if ( defined( 'WPLANG' ) ) {
1304              if ( '' === WPLANG ) {
1305                  break;
1306              }
1307              $locales[] = WPLANG;
1308          }
1309  
1310          if ( isset( $wp_local_package ) ) {
1311              $locales[] = $wp_local_package;
1312          }
1313  
1314          if ( ! $locales ) {
1315              break;
1316          }
1317  
1318          if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) ) {
1319              $locations[] = WP_LANG_DIR;
1320          }
1321  
1322          if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) {
1323              $locations[] = WP_CONTENT_DIR . '/languages';
1324          }
1325  
1326          if ( @is_dir( ABSPATH . 'wp-content/languages' ) ) {
1327              $locations[] = ABSPATH . 'wp-content/languages';
1328          }
1329  
1330          if ( @is_dir( ABSPATH . WPINC . '/languages' ) ) {
1331              $locations[] = ABSPATH . WPINC . '/languages';
1332          }
1333  
1334          if ( ! $locations ) {
1335              break;
1336          }
1337  
1338          $locations = array_unique( $locations );
1339  
1340          foreach ( $locales as $locale ) {
1341              foreach ( $locations as $location ) {
1342                  if ( file_exists( $location . '/' . $locale . '.mo' ) ) {
1343                      load_textdomain( 'default', $location . '/' . $locale . '.mo' );
1344                      if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) ) {
1345                          load_textdomain( 'default', $location . '/admin-' . $locale . '.mo' );
1346                      }
1347                      break 2;
1348                  }
1349              }
1350          }
1351  
1352          break;
1353      }
1354  
1355      $wp_locale = new WP_Locale();
1356  }
1357  
1358  /**
1359   * Check or set whether WordPress is in "installation" mode.
1360   *
1361   * If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`.
1362   *
1363   * @since 4.4.0
1364   *
1365   * @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off.
1366   *                            Omit this parameter if you only want to fetch the current status.
1367   * @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will
1368   *              report whether WP was in installing mode prior to the change to `$is_installing`.
1369   */
1370  function wp_installing( $is_installing = null ) {
1371      static $installing = null;
1372  
1373      // Support for the `WP_INSTALLING` constant, defined before WP is loaded.
1374      if ( is_null( $installing ) ) {
1375          $installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING;
1376      }
1377  
1378      if ( ! is_null( $is_installing ) ) {
1379          $old_installing = $installing;
1380          $installing     = $is_installing;
1381          return (bool) $old_installing;
1382      }
1383  
1384      return (bool) $installing;
1385  }
1386  
1387  /**
1388   * Determines if SSL is used.
1389   *
1390   * @since 2.6.0
1391   * @since 4.6.0 Moved from functions.php to load.php.
1392   *
1393   * @return bool True if SSL, otherwise false.
1394   */
1395  function is_ssl() {
1396      if ( isset( $_SERVER['HTTPS'] ) ) {
1397          if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
1398              return true;
1399          }
1400  
1401          if ( '1' == $_SERVER['HTTPS'] ) {
1402              return true;
1403          }
1404      } elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
1405          return true;
1406      }
1407      return false;
1408  }
1409  
1410  /**
1411   * Converts a shorthand byte value to an integer byte value.
1412   *
1413   * @since 2.3.0
1414   * @since 4.6.0 Moved from media.php to load.php.
1415   *
1416   * @link https://www.php.net/manual/en/function.ini-get.php
1417   * @link https://www.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
1418   *
1419   * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
1420   * @return int An integer byte value.
1421   */
1422  function wp_convert_hr_to_bytes( $value ) {
1423      $value = strtolower( trim( $value ) );
1424      $bytes = (int) $value;
1425  
1426      if ( false !== strpos( $value, 'g' ) ) {
1427          $bytes *= GB_IN_BYTES;
1428      } elseif ( false !== strpos( $value, 'm' ) ) {
1429          $bytes *= MB_IN_BYTES;
1430      } elseif ( false !== strpos( $value, 'k' ) ) {
1431          $bytes *= KB_IN_BYTES;
1432      }
1433  
1434      // Deal with large (float) values which run into the maximum integer size.
1435      return min( $bytes, PHP_INT_MAX );
1436  }
1437  
1438  /**
1439   * Determines whether a PHP ini value is changeable at runtime.
1440   *
1441   * @since 4.6.0
1442   *
1443   * @link https://www.php.net/manual/en/function.ini-get-all.php
1444   *
1445   * @param string $setting The name of the ini setting to check.
1446   * @return bool True if the value is changeable at runtime. False otherwise.
1447   */
1448  function wp_is_ini_value_changeable( $setting ) {
1449      static $ini_all;
1450  
1451      if ( ! isset( $ini_all ) ) {
1452          $ini_all = false;
1453          // Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
1454          if ( function_exists( 'ini_get_all' ) ) {
1455              $ini_all = ini_get_all();
1456          }
1457      }
1458  
1459      // 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.
1460      if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) ) ) {
1461          return true;
1462      }
1463  
1464      // If we were unable to retrieve the details, fail gracefully to assume it's changeable.
1465      if ( ! is_array( $ini_all ) ) {
1466          return true;
1467      }
1468  
1469      return false;
1470  }
1471  
1472  /**
1473   * Determines whether the current request is a WordPress Ajax request.
1474   *
1475   * @since 4.7.0
1476   *
1477   * @return bool True if it's a WordPress Ajax request, false otherwise.
1478   */
1479  function wp_doing_ajax() {
1480      /**
1481       * Filters whether the current request is a WordPress Ajax request.
1482       *
1483       * @since 4.7.0
1484       *
1485       * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request.
1486       */
1487      return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX );
1488  }
1489  
1490  /**
1491   * Determines whether the current request should use themes.
1492   *
1493   * @since 5.1.0
1494   *
1495   * @return bool True if themes should be used, false otherwise.
1496   */
1497  function wp_using_themes() {
1498      /**
1499       * Filters whether the current request should use themes.
1500       *
1501       * @since 5.1.0
1502       *
1503       * @param bool $wp_using_themes Whether the current request should use themes.
1504       */
1505      return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES );
1506  }
1507  
1508  /**
1509   * Determines whether the current request is a WordPress cron request.
1510   *
1511   * @since 4.8.0
1512   *
1513   * @return bool True if it's a WordPress cron request, false otherwise.
1514   */
1515  function wp_doing_cron() {
1516      /**
1517       * Filters whether the current request is a WordPress cron request.
1518       *
1519       * @since 4.8.0
1520       *
1521       * @param bool $wp_doing_cron Whether the current request is a WordPress cron request.
1522       */
1523      return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON );
1524  }
1525  
1526  /**
1527   * Checks whether the given variable is a WordPress Error.
1528   *
1529   * Returns whether `$thing` is an instance of the `WP_Error` class.
1530   *
1531   * @since 2.1.0
1532   *
1533   * @param mixed $thing The variable to check.
1534   * @return bool Whether the variable is an instance of WP_Error.
1535   */
1536  function is_wp_error( $thing ) {
1537      $is_wp_error = ( $thing instanceof WP_Error );
1538  
1539      if ( $is_wp_error ) {
1540          /**
1541           * Fires when `is_wp_error()` is called and its parameter is an instance of `WP_Error`.
1542           *
1543           * @since 5.6.0
1544           *
1545           * @param WP_Error $thing The error object passed to `is_wp_error()`.
1546           */
1547          do_action( 'is_wp_error_instance', $thing );
1548      }
1549  
1550      return $is_wp_error;
1551  }
1552  
1553  /**
1554   * Determines whether file modifications are allowed.
1555   *
1556   * @since 4.8.0
1557   *
1558   * @param string $context The usage context.
1559   * @return bool True if file modification is allowed, false otherwise.
1560   */
1561  function wp_is_file_mod_allowed( $context ) {
1562      /**
1563       * Filters whether file modifications are allowed.
1564       *
1565       * @since 4.8.0
1566       *
1567       * @param bool   $file_mod_allowed Whether file modifications are allowed.
1568       * @param string $context          The usage context.
1569       */
1570      return apply_filters( 'file_mod_allowed', ! defined( 'DISALLOW_FILE_MODS' ) || ! DISALLOW_FILE_MODS, $context );
1571  }
1572  
1573  /**
1574   * Start scraping edited file errors.
1575   *
1576   * @since 4.9.0
1577   */
1578  function wp_start_scraping_edited_file_errors() {
1579      if ( ! isset( $_REQUEST['wp_scrape_key'] ) || ! isset( $_REQUEST['wp_scrape_nonce'] ) ) {
1580          return;
1581      }
1582      $key   = substr( sanitize_key( wp_unslash( $_REQUEST['wp_scrape_key'] ) ), 0, 32 );
1583      $nonce = wp_unslash( $_REQUEST['wp_scrape_nonce'] );
1584  
1585      if ( get_transient( 'scrape_key_' . $key ) !== $nonce ) {
1586          echo "###### wp_scraping_result_start:$key ######";
1587          echo wp_json_encode(
1588              array(
1589                  'code'    => 'scrape_nonce_failure',
1590                  'message' => __( 'Scrape nonce check failed. Please try again.' ),
1591              )
1592          );
1593          echo "###### wp_scraping_result_end:$key ######";
1594          die();
1595      }
1596      if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
1597          define( 'WP_SANDBOX_SCRAPING', true );
1598      }
1599      register_shutdown_function( 'wp_finalize_scraping_edited_file_errors', $key );
1600  }
1601  
1602  /**
1603   * Finalize scraping for edited file errors.
1604   *
1605   * @since 4.9.0
1606   *
1607   * @param string $scrape_key Scrape key.
1608   */
1609  function wp_finalize_scraping_edited_file_errors( $scrape_key ) {
1610      $error = error_get_last();
1611      echo "\n###### wp_scraping_result_start:$scrape_key ######\n";
1612      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 ) ) {
1613          $error = str_replace( ABSPATH, '', $error );
1614          echo wp_json_encode( $error );
1615      } else {
1616          echo wp_json_encode( true );
1617      }
1618      echo "\n###### wp_scraping_result_end:$scrape_key ######\n";
1619  }
1620  
1621  /**
1622   * Checks whether current request is a JSON request, or is expecting a JSON response.
1623   *
1624   * @since 5.0.0
1625   *
1626   * @return bool True if `Accepts` or `Content-Type` headers contain `application/json`.
1627   *              False otherwise.
1628   */
1629  function wp_is_json_request() {
1630  
1631      if ( isset( $_SERVER['HTTP_ACCEPT'] ) && wp_is_json_media_type( $_SERVER['HTTP_ACCEPT'] ) ) {
1632          return true;
1633      }
1634  
1635      if ( isset( $_SERVER['CONTENT_TYPE'] ) && wp_is_json_media_type( $_SERVER['CONTENT_TYPE'] ) ) {
1636          return true;
1637      }
1638  
1639      return false;
1640  
1641  }
1642  
1643  /**
1644   * Checks whether current request is a JSONP request, or is expecting a JSONP response.
1645   *
1646   * @since 5.2.0
1647   *
1648   * @return bool True if JSONP request, false otherwise.
1649   */
1650  function wp_is_jsonp_request() {
1651      if ( ! isset( $_GET['_jsonp'] ) ) {
1652          return false;
1653      }
1654  
1655      if ( ! function_exists( 'wp_check_jsonp_callback' ) ) {
1656          require_once  ABSPATH . WPINC . '/functions.php';
1657      }
1658  
1659      $jsonp_callback = $_GET['_jsonp'];
1660      if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) {
1661          return false;
1662      }
1663  
1664      /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
1665      $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );
1666  
1667      return $jsonp_enabled;
1668  
1669  }
1670  
1671  /**
1672   * Checks whether a string is a valid JSON Media Type.
1673   *
1674   * @since 5.6.0
1675   *
1676   * @param string $media_type A Media Type string to check.
1677   * @return bool True if string is a valid JSON Media Type.
1678   */
1679  function wp_is_json_media_type( $media_type ) {
1680      static $cache = array();
1681  
1682      if ( ! isset( $cache[ $media_type ] ) ) {
1683          $cache[ $media_type ] = (bool) preg_match( '/(^|\s|,)application\/([\w!#\$&-\^\.\+]+\+)?json(\+oembed)?($|\s|;|,)/i', $media_type );
1684      }
1685  
1686      return $cache[ $media_type ];
1687  }
1688  
1689  /**
1690   * Checks whether current request is an XML request, or is expecting an XML response.
1691   *
1692   * @since 5.2.0
1693   *
1694   * @return bool True if `Accepts` or `Content-Type` headers contain `text/xml`
1695   *              or one of the related MIME types. False otherwise.
1696   */
1697  function wp_is_xml_request() {
1698      $accepted = array(
1699          'text/xml',
1700          'application/rss+xml',
1701          'application/atom+xml',
1702          'application/rdf+xml',
1703          'text/xml+oembed',
1704          'application/xml+oembed',
1705      );
1706  
1707      if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) {
1708          foreach ( $accepted as $type ) {
1709              if ( false !== strpos( $_SERVER['HTTP_ACCEPT'], $type ) ) {
1710                  return true;
1711              }
1712          }
1713      }
1714  
1715      if ( isset( $_SERVER['CONTENT_TYPE'] ) && in_array( $_SERVER['CONTENT_TYPE'], $accepted, true ) ) {
1716          return true;
1717      }
1718  
1719      return false;
1720  }
1721  
1722  /**
1723   * Checks if this site is protected by HTTP Basic Auth.
1724   *
1725   * At the moment, this merely checks for the present of Basic Auth credentials. Therefore, calling
1726   * this function with a context different from the current context may give inaccurate results.
1727   * In a future release, this evaluation may be made more robust.
1728   *
1729   * Currently, this is only used by Application Passwords to prevent a conflict since it also utilizes
1730   * Basic Auth.
1731   *
1732   * @since 5.6.1
1733   *
1734   * @global string $pagenow The current page.
1735   *
1736   * @param string $context The context to check for protection. Accepts 'login', 'admin', and 'front'.
1737   *                        Defaults to the current context.
1738   * @return bool Whether the site is protected by Basic Auth.
1739   */
1740  function wp_is_site_protected_by_basic_auth( $context = '' ) {
1741      global $pagenow;
1742  
1743      if ( ! $context ) {
1744          if ( 'wp-login.php' === $pagenow ) {
1745              $context = 'login';
1746          } elseif ( is_admin() ) {
1747              $context = 'admin';
1748          } else {
1749              $context = 'front';
1750          }
1751      }
1752  
1753      $is_protected = ! empty( $_SERVER['PHP_AUTH_USER'] ) || ! empty( $_SERVER['PHP_AUTH_PW'] );
1754  
1755      /**
1756       * Filters whether a site is protected by HTTP Basic Auth.
1757       *
1758       * @since 5.6.1
1759       *
1760       * @param bool $is_protected Whether the site is protected by Basic Auth.
1761       * @param string $context    The context to check for protection. One of 'login', 'admin', or 'front'.
1762       */
1763      return apply_filters( 'wp_is_site_protected_by_basic_auth', $is_protected, $context );
1764  }


Generated: Tue May 18 01:00:05 2021 Cross-referenced by PHPXref 0.7.1