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1 <?php 2 /** 3 * Network API: WP_Network_Query class 4 * 5 * @package WordPress 6 * @subpackage Multisite 7 * @since 4.6.0 8 */ 9 10 /** 11 * Core class used for querying networks. 12 * 13 * @since 4.6.0 14 * 15 * @see WP_Network_Query::__construct() for accepted arguments. 16 */ 17 class WP_Network_Query { 18 19 /** 20 * SQL for database query. 21 * 22 * @since 4.6.0 23 * @var string 24 */ 25 public $request; 26 27 /** 28 * SQL query clauses. 29 * 30 * @since 4.6.0 31 * @var array 32 */ 33 protected $sql_clauses = array( 34 'select' => '', 35 'from' => '', 36 'where' => array(), 37 'groupby' => '', 38 'orderby' => '', 39 'limits' => '', 40 ); 41 42 /** 43 * Query vars set by the user. 44 * 45 * @since 4.6.0 46 * @var array 47 */ 48 public $query_vars; 49 50 /** 51 * Default values for query vars. 52 * 53 * @since 4.6.0 54 * @var array 55 */ 56 public $query_var_defaults; 57 58 /** 59 * List of networks located by the query. 60 * 61 * @since 4.6.0 62 * @var array 63 */ 64 public $networks; 65 66 /** 67 * The amount of found networks for the current query. 68 * 69 * @since 4.6.0 70 * @var int 71 */ 72 public $found_networks = 0; 73 74 /** 75 * The number of pages. 76 * 77 * @since 4.6.0 78 * @var int 79 */ 80 public $max_num_pages = 0; 81 82 /** 83 * Constructor. 84 * 85 * Sets up the network query, based on the query vars passed. 86 * 87 * @since 4.6.0 88 * 89 * @param string|array $query { 90 * Optional. Array or query string of network query parameters. Default empty. 91 * 92 * @type int[] $network__in Array of network IDs to include. Default empty. 93 * @type int[] $network__not_in Array of network IDs to exclude. Default empty. 94 * @type bool $count Whether to return a network count (true) or array of network objects. 95 * Default false. 96 * @type string $fields Network fields to return. Accepts 'ids' (returns an array of network IDs) 97 * or empty (returns an array of complete network objects). Default empty. 98 * @type int $number Maximum number of networks to retrieve. Default empty (no limit). 99 * @type int $offset Number of networks to offset the query. Used to build LIMIT clause. 100 * Default 0. 101 * @type bool $no_found_rows Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true. 102 * @type string|array $orderby Network status or array of statuses. Accepts 'id', 'domain', 'path', 103 * 'domain_length', 'path_length' and 'network__in'. Also accepts false, 104 * an empty array, or 'none' to disable `ORDER BY` clause. Default 'id'. 105 * @type string $order How to order retrieved networks. Accepts 'ASC', 'DESC'. Default 'ASC'. 106 * @type string $domain Limit results to those affiliated with a given domain. Default empty. 107 * @type string[] $domain__in Array of domains to include affiliated networks for. Default empty. 108 * @type string[] $domain__not_in Array of domains to exclude affiliated networks for. Default empty. 109 * @type string $path Limit results to those affiliated with a given path. Default empty. 110 * @type string[] $path__in Array of paths to include affiliated networks for. Default empty. 111 * @type string[] $path__not_in Array of paths to exclude affiliated networks for. Default empty. 112 * @type string $search Search term(s) to retrieve matching networks for. Default empty. 113 * @type bool $update_network_cache Whether to prime the cache for found networks. Default true. 114 * } 115 */ 116 public function __construct( $query = '' ) { 117 $this->query_var_defaults = array( 118 'network__in' => '', 119 'network__not_in' => '', 120 'count' => false, 121 'fields' => '', 122 'number' => '', 123 'offset' => '', 124 'no_found_rows' => true, 125 'orderby' => 'id', 126 'order' => 'ASC', 127 'domain' => '', 128 'domain__in' => '', 129 'domain__not_in' => '', 130 'path' => '', 131 'path__in' => '', 132 'path__not_in' => '', 133 'search' => '', 134 'update_network_cache' => true, 135 ); 136 137 if ( ! empty( $query ) ) { 138 $this->query( $query ); 139 } 140 } 141 142 /** 143 * Parses arguments passed to the network query with default query parameters. 144 * 145 * @since 4.6.0 146 * 147 * @param string|array $query WP_Network_Query arguments. See WP_Network_Query::__construct() 148 */ 149 public function parse_query( $query = '' ) { 150 if ( empty( $query ) ) { 151 $query = $this->query_vars; 152 } 153 154 $this->query_vars = wp_parse_args( $query, $this->query_var_defaults ); 155 156 /** 157 * Fires after the network query vars have been parsed. 158 * 159 * @since 4.6.0 160 * 161 * @param WP_Network_Query $query The WP_Network_Query instance (passed by reference). 162 */ 163 do_action_ref_array( 'parse_network_query', array( &$this ) ); 164 } 165 166 /** 167 * Sets up the WordPress query for retrieving networks. 168 * 169 * @since 4.6.0 170 * 171 * @param string|array $query Array or URL query string of parameters. 172 * @return array|int List of WP_Network objects, a list of network IDs when 'fields' is set to 'ids', 173 * or the number of networks when 'count' is passed as a query var. 174 */ 175 public function query( $query ) { 176 $this->query_vars = wp_parse_args( $query ); 177 return $this->get_networks(); 178 } 179 180 /** 181 * Gets a list of networks matching the query vars. 182 * 183 * @since 4.6.0 184 * 185 * @return array|int List of WP_Network objects, a list of network IDs when 'fields' is set to 'ids', 186 * or the number of networks when 'count' is passed as a query var. 187 */ 188 public function get_networks() { 189 $this->parse_query(); 190 191 /** 192 * Fires before networks are retrieved. 193 * 194 * @since 4.6.0 195 * 196 * @param WP_Network_Query $query Current instance of WP_Network_Query (passed by reference). 197 */ 198 do_action_ref_array( 'pre_get_networks', array( &$this ) ); 199 200 $network_data = null; 201 202 /** 203 * Filters the network data before the query takes place. 204 * 205 * Return a non-null value to bypass WordPress' default network queries. 206 * 207 * The expected return type from this filter depends on the value passed 208 * in the request query vars: 209 * - When `$this->query_vars['count']` is set, the filter should return 210 * the network count as an integer. 211 * - When `'ids' === $this->query_vars['fields']`, the filter should return 212 * an array of network IDs. 213 * - Otherwise the filter should return an array of WP_Network objects. 214 * 215 * Note that if the filter returns an array of network data, it will be assigned 216 * to the `networks` property of the current WP_Network_Query instance. 217 * 218 * Filtering functions that require pagination information are encouraged to set 219 * the `found_networks` and `max_num_pages` properties of the WP_Network_Query object, 220 * passed to the filter by reference. If WP_Network_Query does not perform a database 221 * query, it will not have enough information to generate these values itself. 222 * 223 * @since 5.2.0 224 * @since 5.6.0 The returned array of network data is assigned to the `networks` property 225 * of the current WP_Network_Query instance. 226 * 227 * @param array|int|null $network_data Return an array of network data to short-circuit WP's network query, 228 * the network count as an integer if `$this->query_vars['count']` is set, 229 * or null to allow WP to run its normal queries. 230 * @param WP_Network_Query $query The WP_Network_Query instance, passed by reference. 231 */ 232 $network_data = apply_filters_ref_array( 'networks_pre_query', array( $network_data, &$this ) ); 233 234 if ( null !== $network_data ) { 235 if ( is_array( $network_data ) && ! $this->query_vars['count'] ) { 236 $this->networks = $network_data; 237 } 238 239 return $network_data; 240 } 241 242 // $args can include anything. Only use the args defined in the query_var_defaults to compute the key. 243 $_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ); 244 245 // Ignore the $fields, $update_network_cache arguments as the queried result will be the same regardless. 246 unset( $_args['fields'], $_args['update_network_cache'] ); 247 248 $key = md5( serialize( $_args ) ); 249 $last_changed = wp_cache_get_last_changed( 'networks' ); 250 251 $cache_key = "get_network_ids:$key:$last_changed"; 252 $cache_value = wp_cache_get( $cache_key, 'networks' ); 253 254 if ( false === $cache_value ) { 255 $network_ids = $this->get_network_ids(); 256 if ( $network_ids ) { 257 $this->set_found_networks(); 258 } 259 260 $cache_value = array( 261 'network_ids' => $network_ids, 262 'found_networks' => $this->found_networks, 263 ); 264 wp_cache_add( $cache_key, $cache_value, 'networks' ); 265 } else { 266 $network_ids = $cache_value['network_ids']; 267 $this->found_networks = $cache_value['found_networks']; 268 } 269 270 if ( $this->found_networks && $this->query_vars['number'] ) { 271 $this->max_num_pages = ceil( $this->found_networks / $this->query_vars['number'] ); 272 } 273 274 // If querying for a count only, there's nothing more to do. 275 if ( $this->query_vars['count'] ) { 276 // $network_ids is actually a count in this case. 277 return (int) $network_ids; 278 } 279 280 $network_ids = array_map( 'intval', $network_ids ); 281 282 if ( 'ids' === $this->query_vars['fields'] ) { 283 $this->networks = $network_ids; 284 return $this->networks; 285 } 286 287 if ( $this->query_vars['update_network_cache'] ) { 288 _prime_network_caches( $network_ids ); 289 } 290 291 // Fetch full network objects from the primed cache. 292 $_networks = array(); 293 foreach ( $network_ids as $network_id ) { 294 $_network = get_network( $network_id ); 295 if ( $_network ) { 296 $_networks[] = $_network; 297 } 298 } 299 300 /** 301 * Filters the network query results. 302 * 303 * @since 4.6.0 304 * 305 * @param WP_Network[] $_networks An array of WP_Network objects. 306 * @param WP_Network_Query $query Current instance of WP_Network_Query (passed by reference). 307 */ 308 $_networks = apply_filters_ref_array( 'the_networks', array( $_networks, &$this ) ); 309 310 // Convert to WP_Network instances. 311 $this->networks = array_map( 'get_network', $_networks ); 312 313 return $this->networks; 314 } 315 316 /** 317 * Used internally to get a list of network IDs matching the query vars. 318 * 319 * @since 4.6.0 320 * 321 * @global wpdb $wpdb WordPress database abstraction object. 322 * 323 * @return int|array A single count of network IDs if a count query. An array of network IDs if a full query. 324 */ 325 protected function get_network_ids() { 326 global $wpdb; 327 328 $order = $this->parse_order( $this->query_vars['order'] ); 329 330 // Disable ORDER BY with 'none', an empty array, or boolean false. 331 if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) { 332 $orderby = ''; 333 } elseif ( ! empty( $this->query_vars['orderby'] ) ) { 334 $ordersby = is_array( $this->query_vars['orderby'] ) ? 335 $this->query_vars['orderby'] : 336 preg_split( '/[,\s]/', $this->query_vars['orderby'] ); 337 338 $orderby_array = array(); 339 foreach ( $ordersby as $_key => $_value ) { 340 if ( ! $_value ) { 341 continue; 342 } 343 344 if ( is_int( $_key ) ) { 345 $_orderby = $_value; 346 $_order = $order; 347 } else { 348 $_orderby = $_key; 349 $_order = $_value; 350 } 351 352 $parsed = $this->parse_orderby( $_orderby ); 353 354 if ( ! $parsed ) { 355 continue; 356 } 357 358 if ( 'network__in' === $_orderby ) { 359 $orderby_array[] = $parsed; 360 continue; 361 } 362 363 $orderby_array[] = $parsed . ' ' . $this->parse_order( $_order ); 364 } 365 366 $orderby = implode( ', ', $orderby_array ); 367 } else { 368 $orderby = "$wpdb->site.id $order"; 369 } 370 371 $number = absint( $this->query_vars['number'] ); 372 $offset = absint( $this->query_vars['offset'] ); 373 $limits = ''; 374 375 if ( ! empty( $number ) ) { 376 if ( $offset ) { 377 $limits = 'LIMIT ' . $offset . ',' . $number; 378 } else { 379 $limits = 'LIMIT ' . $number; 380 } 381 } 382 383 if ( $this->query_vars['count'] ) { 384 $fields = 'COUNT(*)'; 385 } else { 386 $fields = "$wpdb->site.id"; 387 } 388 389 // Parse network IDs for an IN clause. 390 if ( ! empty( $this->query_vars['network__in'] ) ) { 391 $this->sql_clauses['where']['network__in'] = "$wpdb->site.id IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['network__in'] ) ) . ' )'; 392 } 393 394 // Parse network IDs for a NOT IN clause. 395 if ( ! empty( $this->query_vars['network__not_in'] ) ) { 396 $this->sql_clauses['where']['network__not_in'] = "$wpdb->site.id NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['network__not_in'] ) ) . ' )'; 397 } 398 399 if ( ! empty( $this->query_vars['domain'] ) ) { 400 $this->sql_clauses['where']['domain'] = $wpdb->prepare( "$wpdb->site.domain = %s", $this->query_vars['domain'] ); 401 } 402 403 // Parse network domain for an IN clause. 404 if ( is_array( $this->query_vars['domain__in'] ) ) { 405 $this->sql_clauses['where']['domain__in'] = "$wpdb->site.domain IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__in'] ) ) . "' )"; 406 } 407 408 // Parse network domain for a NOT IN clause. 409 if ( is_array( $this->query_vars['domain__not_in'] ) ) { 410 $this->sql_clauses['where']['domain__not_in'] = "$wpdb->site.domain NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__not_in'] ) ) . "' )"; 411 } 412 413 if ( ! empty( $this->query_vars['path'] ) ) { 414 $this->sql_clauses['where']['path'] = $wpdb->prepare( "$wpdb->site.path = %s", $this->query_vars['path'] ); 415 } 416 417 // Parse network path for an IN clause. 418 if ( is_array( $this->query_vars['path__in'] ) ) { 419 $this->sql_clauses['where']['path__in'] = "$wpdb->site.path IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__in'] ) ) . "' )"; 420 } 421 422 // Parse network path for a NOT IN clause. 423 if ( is_array( $this->query_vars['path__not_in'] ) ) { 424 $this->sql_clauses['where']['path__not_in'] = "$wpdb->site.path NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__not_in'] ) ) . "' )"; 425 } 426 427 // Falsey search strings are ignored. 428 if ( strlen( $this->query_vars['search'] ) ) { 429 $this->sql_clauses['where']['search'] = $this->get_search_sql( 430 $this->query_vars['search'], 431 array( "$wpdb->site.domain", "$wpdb->site.path" ) 432 ); 433 } 434 435 $join = ''; 436 437 $where = implode( ' AND ', $this->sql_clauses['where'] ); 438 439 $groupby = ''; 440 441 $clauses = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' ); 442 443 /** 444 * Filters the network query clauses. 445 * 446 * @since 4.6.0 447 * 448 * @param string[] $clauses An associative array of network query clauses. 449 * @param WP_Network_Query $query Current instance of WP_Network_Query (passed by reference). 450 */ 451 $clauses = apply_filters_ref_array( 'networks_clauses', array( compact( $clauses ), &$this ) ); 452 453 $fields = isset( $clauses['fields'] ) ? $clauses['fields'] : ''; 454 $join = isset( $clauses['join'] ) ? $clauses['join'] : ''; 455 $where = isset( $clauses['where'] ) ? $clauses['where'] : ''; 456 $orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : ''; 457 $limits = isset( $clauses['limits'] ) ? $clauses['limits'] : ''; 458 $groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : ''; 459 460 if ( $where ) { 461 $where = 'WHERE ' . $where; 462 } 463 464 if ( $groupby ) { 465 $groupby = 'GROUP BY ' . $groupby; 466 } 467 468 if ( $orderby ) { 469 $orderby = "ORDER BY $orderby"; 470 } 471 472 $found_rows = ''; 473 if ( ! $this->query_vars['no_found_rows'] ) { 474 $found_rows = 'SQL_CALC_FOUND_ROWS'; 475 } 476 477 $this->sql_clauses['select'] = "SELECT $found_rows $fields"; 478 $this->sql_clauses['from'] = "FROM $wpdb->site $join"; 479 $this->sql_clauses['groupby'] = $groupby; 480 $this->sql_clauses['orderby'] = $orderby; 481 $this->sql_clauses['limits'] = $limits; 482 483 $this->request = " 484 {$this->sql_clauses['select']} 485 {$this->sql_clauses['from']} 486 {$where} 487 {$this->sql_clauses['groupby']} 488 {$this->sql_clauses['orderby']} 489 {$this->sql_clauses['limits']} 490 "; 491 492 if ( $this->query_vars['count'] ) { 493 return (int) $wpdb->get_var( $this->request ); 494 } 495 496 $network_ids = $wpdb->get_col( $this->request ); 497 498 return array_map( 'intval', $network_ids ); 499 } 500 501 /** 502 * Populates found_networks and max_num_pages properties for the current query 503 * if the limit clause was used. 504 * 505 * @since 4.6.0 506 * 507 * @global wpdb $wpdb WordPress database abstraction object. 508 */ 509 private function set_found_networks() { 510 global $wpdb; 511 512 if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { 513 /** 514 * Filters the query used to retrieve found network count. 515 * 516 * @since 4.6.0 517 * 518 * @param string $found_networks_query SQL query. Default 'SELECT FOUND_ROWS()'. 519 * @param WP_Network_Query $network_query The `WP_Network_Query` instance. 520 */ 521 $found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this ); 522 523 $this->found_networks = (int) $wpdb->get_var( $found_networks_query ); 524 } 525 } 526 527 /** 528 * Used internally to generate an SQL string for searching across multiple columns. 529 * 530 * @since 4.6.0 531 * 532 * @global wpdb $wpdb WordPress database abstraction object. 533 * 534 * @param string $search Search string. 535 * @param string[] $columns Array of columns to search. 536 * @return string Search SQL. 537 */ 538 protected function get_search_sql( $search, $columns ) { 539 global $wpdb; 540 541 $like = '%' . $wpdb->esc_like( $search ) . '%'; 542 543 $searches = array(); 544 foreach ( $columns as $column ) { 545 $searches[] = $wpdb->prepare( "$column LIKE %s", $like ); 546 } 547 548 return '(' . implode( ' OR ', $searches ) . ')'; 549 } 550 551 /** 552 * Parses and sanitizes 'orderby' keys passed to the network query. 553 * 554 * @since 4.6.0 555 * 556 * @global wpdb $wpdb WordPress database abstraction object. 557 * 558 * @param string $orderby Alias for the field to order by. 559 * @return string|false Value to used in the ORDER clause. False otherwise. 560 */ 561 protected function parse_orderby( $orderby ) { 562 global $wpdb; 563 564 $allowed_keys = array( 565 'id', 566 'domain', 567 'path', 568 ); 569 570 $parsed = false; 571 if ( 'network__in' === $orderby ) { 572 $network__in = implode( ',', array_map( 'absint', $this->query_vars['network__in'] ) ); 573 $parsed = "FIELD( {$wpdb->site}.id, $network__in )"; 574 } elseif ( 'domain_length' === $orderby || 'path_length' === $orderby ) { 575 $field = substr( $orderby, 0, -7 ); 576 $parsed = "CHAR_LENGTH($wpdb->site.$field)"; 577 } elseif ( in_array( $orderby, $allowed_keys, true ) ) { 578 $parsed = "$wpdb->site.$orderby"; 579 } 580 581 return $parsed; 582 } 583 584 /** 585 * Parses an 'order' query variable and cast it to 'ASC' or 'DESC' as necessary. 586 * 587 * @since 4.6.0 588 * 589 * @param string $order The 'order' query variable. 590 * @return string The sanitized 'order' query variable. 591 */ 592 protected function parse_order( $order ) { 593 if ( ! is_string( $order ) || empty( $order ) ) { 594 return 'ASC'; 595 } 596 597 if ( 'ASC' === strtoupper( $order ) ) { 598 return 'ASC'; 599 } else { 600 return 'DESC'; 601 } 602 } 603 }
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