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PHP Cross Reference of WordPress Trunk (Updated Daily) |
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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' ) ) ) { 18 $protocol = 'HTTP/1.0'; 19 } 20 return $protocol; 21 } 22 23 /** 24 * Turn register globals off. 25 * 26 * @since 2.1.0 27 * @access private 28 */ 29 function wp_unregister_GLOBALS() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid 30 if ( ! ini_get( 'register_globals' ) ) { 31 return; 32 } 33 34 if ( isset( $_REQUEST['GLOBALS'] ) ) { 35 die( 'GLOBALS overwrite attempt detected' ); 36 } 37 38 // Variables that shouldn't be unset 39 $no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' ); 40 41 $input = array_merge( $_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset( $_SESSION ) && is_array( $_SESSION ) ? $_SESSION : array() ); 42 foreach ( $input as $k => $v ) { 43 if ( ! in_array( $k, $no_unset ) && isset( $GLOBALS[ $k ] ) ) { 44 unset( $GLOBALS[ $k ] ); 45 } 46 } 47 } 48 49 /** 50 * Fix `$_SERVER` variables for various setups. 51 * 52 * @since 3.0.0 53 * @access private 54 * 55 * @global string $PHP_SELF The filename of the currently executing script, 56 * relative to the document root. 57 */ 58 function wp_fix_server_vars() { 59 global $PHP_SELF; 60 61 $default_server_values = array( 62 'SERVER_SOFTWARE' => '', 63 'REQUEST_URI' => '', 64 ); 65 66 $_SERVER = array_merge( $default_server_values, $_SERVER ); 67 68 // Fix for IIS when running with PHP ISAPI 69 if ( empty( $_SERVER['REQUEST_URI'] ) || ( PHP_SAPI != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) { 70 71 if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) { 72 // IIS Mod-Rewrite 73 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL']; 74 } elseif ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) { 75 // IIS Isapi_Rewrite 76 $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL']; 77 } else { 78 // Use ORIG_PATH_INFO if there is no PATH_INFO 79 if ( ! isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) ) { 80 $_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO']; 81 } 82 83 // Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice) 84 if ( isset( $_SERVER['PATH_INFO'] ) ) { 85 if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] ) { 86 $_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO']; 87 } else { 88 $_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO']; 89 } 90 } 91 92 // Append the query string if it exists and isn't null 93 if ( ! empty( $_SERVER['QUERY_STRING'] ) ) { 94 $_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING']; 95 } 96 } 97 } 98 99 // Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests 100 if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && ( strpos( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) == strlen( $_SERVER['SCRIPT_FILENAME'] ) - 7 ) ) { 101 $_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED']; 102 } 103 104 // Fix for Dreamhost and other PHP as CGI hosts 105 if ( strpos( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) !== false ) { 106 unset( $_SERVER['PATH_INFO'] ); 107 } 108 109 // Fix empty PHP_SELF 110 $PHP_SELF = $_SERVER['PHP_SELF']; 111 if ( empty( $PHP_SELF ) ) { 112 $_SERVER['PHP_SELF'] = preg_replace( '/(\?.*)?$/', '', $_SERVER['REQUEST_URI'] ); 113 $PHP_SELF = $_SERVER['PHP_SELF']; 114 } 115 } 116 117 /** 118 * Check for the required PHP version, and the MySQL extension or 119 * a database drop-in. 120 * 121 * Dies if requirements are not met. 122 * 123 * @since 3.0.0 124 * @access private 125 * 126 * @global string $required_php_version The required PHP version string. 127 * @global string $wp_version The WordPress version string. 128 */ 129 function wp_check_php_mysql_versions() { 130 global $required_php_version, $wp_version; 131 $php_version = phpversion(); 132 133 if ( version_compare( $required_php_version, $php_version, '>' ) ) { 134 $protocol = wp_get_server_protocol(); 135 header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 ); 136 header( 'Content-Type: text/html; charset=utf-8' ); 137 printf( 'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.', $php_version, $wp_version, $required_php_version ); 138 exit( 1 ); 139 } 140 141 if ( ! extension_loaded( 'mysql' ) && ! extension_loaded( 'mysqli' ) && ! extension_loaded( 'mysqlnd' ) && ! file_exists( WP_CONTENT_DIR . '/db.php' ) ) { 142 require_once ( ABSPATH . WPINC . '/functions.php' ); 143 wp_load_translations_early(); 144 $args = array( 145 'exit' => false, 146 'code' => 'mysql_not_found', 147 ); 148 wp_die( 149 __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ), 150 __( 'Requirements Not Met' ), 151 $args 152 ); 153 exit( 1 ); 154 } 155 } 156 157 /** 158 * Don't load all of WordPress when handling a favicon.ico request. 159 * 160 * Instead, send the headers for a zero-length favicon and bail. 161 * 162 * @since 3.0.0 163 */ 164 function wp_favicon_request() { 165 if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) { 166 header( 'Content-Type: image/vnd.microsoft.icon' ); 167 exit; 168 } 169 } 170 171 /** 172 * Die with a maintenance message when conditions are met. 173 * 174 * Checks for a file in the WordPress root directory named ".maintenance". 175 * This file will contain the variable $upgrading, set to the time the file 176 * was created. If the file was created less than 10 minutes ago, WordPress 177 * enters maintenance mode and displays a message. 178 * 179 * The default message can be replaced by using a drop-in (maintenance.php in 180 * the wp-content directory). 181 * 182 * @since 3.0.0 183 * @access private 184 * 185 * @global int $upgrading the unix timestamp marking when upgrading WordPress began. 186 */ 187 function wp_maintenance() { 188 if ( ! file_exists( ABSPATH . '.maintenance' ) || wp_installing() ) { 189 return; 190 } 191 192 global $upgrading; 193 194 include( ABSPATH . '.maintenance' ); 195 // If the $upgrading timestamp is older than 10 minutes, don't die. 196 if ( ( time() - $upgrading ) >= 600 ) { 197 return; 198 } 199 200 /** 201 * Filters whether to enable maintenance mode. 202 * 203 * This filter runs before it can be used by plugins. It is designed for 204 * non-web runtimes. If this filter returns true, maintenance mode will be 205 * active and the request will end. If false, the request will be allowed to 206 * continue processing even if maintenance mode should be active. 207 * 208 * @since 4.6.0 209 * 210 * @param bool $enable_checks Whether to enable maintenance mode. Default true. 211 * @param int $upgrading The timestamp set in the .maintenance file. 212 */ 213 if ( ! apply_filters( 'enable_maintenance_mode', true, $upgrading ) ) { 214 return; 215 } 216 217 if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) { 218 require_once( WP_CONTENT_DIR . '/maintenance.php' ); 219 die(); 220 } 221 222 require_once ( ABSPATH . WPINC . '/functions.php' ); 223 wp_load_translations_early(); 224 225 header( 'Retry-After: 600' ); 226 227 wp_die( 228 __( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ), 229 __( 'Maintenance' ), 230 503 231 ); 232 } 233 234 /** 235 * Start the WordPress micro-timer. 236 * 237 * @since 0.71 238 * @access private 239 * 240 * @global float $timestart Unix timestamp set at the beginning of the page load. 241 * @see timer_stop() 242 * 243 * @return bool Always returns true. 244 */ 245 function timer_start() { 246 global $timestart; 247 $timestart = microtime( true ); 248 return true; 249 } 250 251 /** 252 * Retrieve or display the time from the page start to when function is called. 253 * 254 * @since 0.71 255 * 256 * @global float $timestart Seconds from when timer_start() is called. 257 * @global float $timeend Seconds from when function is called. 258 * 259 * @param int|bool $display Whether to echo or return the results. Accepts 0|false for return, 260 * 1|true for echo. Default 0|false. 261 * @param int $precision The number of digits from the right of the decimal to display. 262 * Default 3. 263 * @return string The "second.microsecond" finished time calculation. The number is formatted 264 * for human consumption, both localized and rounded. 265 */ 266 function timer_stop( $display = 0, $precision = 3 ) { 267 global $timestart, $timeend; 268 $timeend = microtime( true ); 269 $timetotal = $timeend - $timestart; 270 $r = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision ); 271 if ( $display ) { 272 echo $r; 273 } 274 return $r; 275 } 276 277 /** 278 * Set PHP error reporting based on WordPress debug settings. 279 * 280 * Uses three constants: `WP_DEBUG`, `WP_DEBUG_DISPLAY`, and `WP_DEBUG_LOG`. 281 * All three can be defined in wp-config.php. By default, `WP_DEBUG` and 282 * `WP_DEBUG_LOG` are set to false, and `WP_DEBUG_DISPLAY` is set to true. 283 * 284 * When `WP_DEBUG` is true, all PHP notices are reported. WordPress will also 285 * display internal notices: when a deprecated WordPress function, function 286 * argument, or file is used. Deprecated code may be removed from a later 287 * version. 288 * 289 * It is strongly recommended that plugin and theme developers use `WP_DEBUG` 290 * in their development environments. 291 * 292 * `WP_DEBUG_DISPLAY` and `WP_DEBUG_LOG` perform no function unless `WP_DEBUG` 293 * is true. 294 * 295 * When `WP_DEBUG_DISPLAY` is true, WordPress will force errors to be displayed. 296 * `WP_DEBUG_DISPLAY` defaults to true. Defining it as null prevents WordPress 297 * from changing the global configuration setting. Defining `WP_DEBUG_DISPLAY` 298 * as false will force errors to be hidden. 299 * 300 * When `WP_DEBUG_LOG` is true, errors will be logged to `wp-content/debug.log`. 301 * When `WP_DEBUG_LOG` is a valid path, errors will be logged to the specified file. 302 * 303 * Errors are never displayed for XML-RPC, REST, and Ajax requests. 304 * 305 * @since 3.0.0 306 * @since 5.1.0 `WP_DEBUG_LOG` can be a file path. 307 * @access private 308 */ 309 function wp_debug_mode() { 310 /** 311 * Filters whether to allow the debug mode check to occur. 312 * 313 * This filter runs before it can be used by plugins. It is designed for 314 * non-web run-times. Returning false causes the `WP_DEBUG` and related 315 * constants to not be checked and the default php values for errors 316 * will be used unless you take care to update them yourself. 317 * 318 * @since 4.6.0 319 * 320 * @param bool $enable_debug_mode Whether to enable debug mode checks to occur. Default true. 321 */ 322 if ( ! apply_filters( 'enable_wp_debug_mode_checks', true ) ) { 323 return; 324 } 325 326 if ( WP_DEBUG ) { 327 error_reporting( E_ALL ); 328 329 if ( WP_DEBUG_DISPLAY ) { 330 ini_set( 'display_errors', 1 ); 331 } elseif ( null !== WP_DEBUG_DISPLAY ) { 332 ini_set( 'display_errors', 0 ); 333 } 334 335 if ( in_array( strtolower( (string) WP_DEBUG_LOG ), array( 'true', '1' ), true ) ) { 336 $log_path = WP_CONTENT_DIR . '/debug.log'; 337 } elseif ( is_string( WP_DEBUG_LOG ) ) { 338 $log_path = WP_DEBUG_LOG; 339 } else { 340 $log_path = false; 341 } 342 343 if ( $log_path ) { 344 ini_set( 'log_errors', 1 ); 345 ini_set( 'error_log', $log_path ); 346 } 347 } else { 348 error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR ); 349 } 350 351 if ( defined( 'XMLRPC_REQUEST' ) || defined( 'REST_REQUEST' ) || ( defined( 'WP_INSTALLING' ) && WP_INSTALLING ) || wp_doing_ajax() || wp_is_json_request() ) { 352 ini_set( 'display_errors', 0 ); 353 } 354 } 355 356 /** 357 * Set the location of the language directory. 358 * 359 * To set directory manually, define the `WP_LANG_DIR` constant 360 * in wp-config.php. 361 * 362 * If the language directory exists within `WP_CONTENT_DIR`, it 363 * is used. Otherwise the language directory is assumed to live 364 * in `WPINC`. 365 * 366 * @since 3.0.0 367 * @access private 368 */ 369 function wp_set_lang_dir() { 370 if ( ! defined( 'WP_LANG_DIR' ) ) { 371 if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) || ! @is_dir( ABSPATH . WPINC . '/languages' ) ) { 372 /** 373 * Server path of the language directory. 374 * 375 * No leading slash, no trailing slash, full path, not relative to ABSPATH 376 * 377 * @since 2.1.0 378 */ 379 define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' ); 380 if ( ! defined( 'LANGDIR' ) ) { 381 // Old static relative path maintained for limited backward compatibility - won't work in some cases. 382 define( 'LANGDIR', 'wp-content/languages' ); 383 } 384 } else { 385 /** 386 * Server path of the language directory. 387 * 388 * No leading slash, no trailing slash, full path, not relative to `ABSPATH`. 389 * 390 * @since 2.1.0 391 */ 392 define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' ); 393 if ( ! defined( 'LANGDIR' ) ) { 394 // Old relative path maintained for backward compatibility. 395 define( 'LANGDIR', WPINC . '/languages' ); 396 } 397 } 398 } 399 } 400 401 /** 402 * Load the database class file and instantiate the `$wpdb` global. 403 * 404 * @since 2.5.0 405 * 406 * @global wpdb $wpdb WordPress database abstraction object. 407 */ 408 function require_wp_db() { 409 global $wpdb; 410 411 require_once ( ABSPATH . WPINC . '/wp-db.php' ); 412 if ( file_exists( WP_CONTENT_DIR . '/db.php' ) ) { 413 require_once( WP_CONTENT_DIR . '/db.php' ); 414 } 415 416 if ( isset( $wpdb ) ) { 417 return; 418 } 419 420 $dbuser = defined( 'DB_USER' ) ? DB_USER : ''; 421 $dbpassword = defined( 'DB_PASSWORD' ) ? DB_PASSWORD : ''; 422 $dbname = defined( 'DB_NAME' ) ? DB_NAME : ''; 423 $dbhost = defined( 'DB_HOST' ) ? DB_HOST : ''; 424 425 $wpdb = new wpdb( $dbuser, $dbpassword, $dbname, $dbhost ); 426 } 427 428 /** 429 * Set the database table prefix and the format specifiers for database 430 * table columns. 431 * 432 * Columns not listed here default to `%s`. 433 * 434 * @since 3.0.0 435 * @access private 436 * 437 * @global wpdb $wpdb WordPress database abstraction object. 438 * @global string $table_prefix The database table prefix. 439 */ 440 function wp_set_wpdb_vars() { 441 global $wpdb, $table_prefix; 442 if ( ! empty( $wpdb->error ) ) { 443 dead_db(); 444 } 445 446 $wpdb->field_types = array( 447 'post_author' => '%d', 448 'post_parent' => '%d', 449 'menu_order' => '%d', 450 'term_id' => '%d', 451 'term_group' => '%d', 452 'term_taxonomy_id' => '%d', 453 'parent' => '%d', 454 'count' => '%d', 455 'object_id' => '%d', 456 'term_order' => '%d', 457 'ID' => '%d', 458 'comment_ID' => '%d', 459 'comment_post_ID' => '%d', 460 'comment_parent' => '%d', 461 'user_id' => '%d', 462 'link_id' => '%d', 463 'link_owner' => '%d', 464 'link_rating' => '%d', 465 'option_id' => '%d', 466 'blog_id' => '%d', 467 'meta_id' => '%d', 468 'post_id' => '%d', 469 'user_status' => '%d', 470 'umeta_id' => '%d', 471 'comment_karma' => '%d', 472 'comment_count' => '%d', 473 // multisite: 474 'active' => '%d', 475 'cat_id' => '%d', 476 'deleted' => '%d', 477 'lang_id' => '%d', 478 'mature' => '%d', 479 'public' => '%d', 480 'site_id' => '%d', 481 'spam' => '%d', 482 ); 483 484 $prefix = $wpdb->set_prefix( $table_prefix ); 485 486 if ( is_wp_error( $prefix ) ) { 487 wp_load_translations_early(); 488 wp_die( 489 sprintf( 490 /* translators: 1: $table_prefix, 2: wp-config.php */ 491 __( '<strong>ERROR</strong>: %1$s in %2$s can only contain numbers, letters, and underscores.' ), 492 '<code>$table_prefix</code>', 493 '<code>wp-config.php</code>' 494 ) 495 ); 496 } 497 } 498 499 /** 500 * Toggle `$_wp_using_ext_object_cache` on and off without directly 501 * touching global. 502 * 503 * @since 3.7.0 504 * 505 * @global bool $_wp_using_ext_object_cache 506 * 507 * @param bool $using Whether external object cache is being used. 508 * @return bool The current 'using' setting. 509 */ 510 function wp_using_ext_object_cache( $using = null ) { 511 global $_wp_using_ext_object_cache; 512 $current_using = $_wp_using_ext_object_cache; 513 if ( null !== $using ) { 514 $_wp_using_ext_object_cache = $using; 515 } 516 return $current_using; 517 } 518 519 /** 520 * Start the WordPress object cache. 521 * 522 * If an object-cache.php file exists in the wp-content directory, 523 * it uses that drop-in as an external object cache. 524 * 525 * @since 3.0.0 526 * @access private 527 * 528 * @global array $wp_filter Stores all of the filters. 529 */ 530 function wp_start_object_cache() { 531 global $wp_filter; 532 static $first_init = true; 533 534 // Only perform the following checks once. 535 if ( $first_init ) { 536 if ( ! function_exists( 'wp_cache_init' ) ) { 537 /* 538 * This is the normal situation. First-run of this function. No 539 * caching backend has been loaded. 540 * 541 * We try to load a custom caching backend, and then, if it 542 * results in a wp_cache_init() function existing, we note 543 * that an external object cache is being used. 544 */ 545 if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) { 546 require_once( WP_CONTENT_DIR . '/object-cache.php' ); 547 if ( function_exists( 'wp_cache_init' ) ) { 548 wp_using_ext_object_cache( true ); 549 } 550 551 // Re-initialize any hooks added manually by object-cache.php 552 if ( $wp_filter ) { 553 $wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter ); 554 } 555 } 556 } elseif ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) { 557 /* 558 * Sometimes advanced-cache.php can load object-cache.php before 559 * this function is run. This breaks the function_exists() check 560 * above and can result in wp_using_ext_object_cache() returning 561 * false when actually an external cache is in use. 562 */ 563 wp_using_ext_object_cache( true ); 564 } 565 } 566 567 if ( ! wp_using_ext_object_cache() ) { 568 require_once ( ABSPATH . WPINC . '/cache.php' ); 569 } 570 571 /* 572 * If cache supports reset, reset instead of init if already 573 * initialized. Reset signals to the cache that global IDs 574 * have changed and it may need to update keys and cleanup caches. 575 */ 576 if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) ) { 577 wp_cache_switch_to_blog( get_current_blog_id() ); 578 } elseif ( function_exists( 'wp_cache_init' ) ) { 579 wp_cache_init(); 580 } 581 582 if ( function_exists( 'wp_cache_add_global_groups' ) ) { 583 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' ) ); 584 wp_cache_add_non_persistent_groups( array( 'counts', 'plugins' ) ); 585 } 586 587 $first_init = false; 588 } 589 590 /** 591 * Redirect to the installer if WordPress is not installed. 592 * 593 * Dies with an error message when Multisite is enabled. 594 * 595 * @since 3.0.0 596 * @access private 597 */ 598 function wp_not_installed() { 599 if ( is_multisite() ) { 600 if ( ! is_blog_installed() && ! wp_installing() ) { 601 nocache_headers(); 602 603 wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) ); 604 } 605 } elseif ( ! is_blog_installed() && ! wp_installing() ) { 606 nocache_headers(); 607 608 require ( ABSPATH . WPINC . '/kses.php' ); 609 require ( ABSPATH . WPINC . '/pluggable.php' ); 610 611 $link = wp_guess_url() . '/wp-admin/install.php'; 612 613 wp_redirect( $link ); 614 die(); 615 } 616 } 617 618 /** 619 * Retrieve an array of must-use plugin files. 620 * 621 * The default directory is wp-content/mu-plugins. To change the default 622 * directory manually, define `WPMU_PLUGIN_DIR` and `WPMU_PLUGIN_URL` 623 * in wp-config.php. 624 * 625 * @since 3.0.0 626 * @access private 627 * 628 * @return array Files to include. 629 */ 630 function wp_get_mu_plugins() { 631 $mu_plugins = array(); 632 if ( ! is_dir( WPMU_PLUGIN_DIR ) ) { 633 return $mu_plugins; 634 } 635 $dh = opendir( WPMU_PLUGIN_DIR ); 636 if ( ! $dh ) { 637 return $mu_plugins; 638 } 639 while ( ( $plugin = readdir( $dh ) ) !== false ) { 640 if ( substr( $plugin, -4 ) == '.php' ) { 641 $mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin; 642 } 643 } 644 closedir( $dh ); 645 sort( $mu_plugins ); 646 647 return $mu_plugins; 648 } 649 650 /** 651 * Retrieve an array of active and valid plugin files. 652 * 653 * While upgrading or installing WordPress, no plugins are returned. 654 * 655 * The default directory is `wp-content/plugins`. To change the default 656 * directory manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL` 657 * in `wp-config.php`. 658 * 659 * @since 3.0.0 660 * @access private 661 * 662 * @return string[] $plugin_file Array of paths to plugin files relative to the plugins directory. 663 */ 664 function wp_get_active_and_valid_plugins() { 665 $plugins = array(); 666 $active_plugins = (array) get_option( 'active_plugins', array() ); 667 668 // Check for hacks file if the option is enabled 669 if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) { 670 _deprecated_file( 'my-hacks.php', '1.5.0' ); 671 array_unshift( $plugins, ABSPATH . 'my-hacks.php' ); 672 } 673 674 if ( empty( $active_plugins ) || wp_installing() ) { 675 return $plugins; 676 } 677 678 $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false; 679 680 foreach ( $active_plugins as $plugin ) { 681 if ( ! validate_file( $plugin ) // $plugin must validate as file 682 && '.php' == substr( $plugin, -4 ) // $plugin must end with '.php' 683 && file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist 684 // not already included as a network plugin 685 && ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins ) ) 686 ) { 687 $plugins[] = WP_PLUGIN_DIR . '/' . $plugin; 688 } 689 } 690 691 /* 692 * Remove plugins from the list of active plugins when we're on an endpoint 693 * that should be protected against WSODs and the plugin is paused. 694 */ 695 if ( wp_is_recovery_mode() ) { 696 $plugins = wp_skip_paused_plugins( $plugins ); 697 } 698 699 return $plugins; 700 } 701 702 /** 703 * Filters a given list of plugins, removing any paused plugins from it. 704 * 705 * @since 5.2.0 706 * 707 * @param array $plugins List of absolute plugin main file paths. 708 * @return array Filtered value of $plugins, without any paused plugins. 709 */ 710 function wp_skip_paused_plugins( array $plugins ) { 711 $paused_plugins = wp_paused_plugins()->get_all(); 712 713 if ( empty( $paused_plugins ) ) { 714 return $plugins; 715 } 716 717 foreach ( $plugins as $index => $plugin ) { 718 list( $plugin ) = explode( '/', plugin_basename( $plugin ) ); 719 720 if ( array_key_exists( $plugin, $paused_plugins ) ) { 721 unset( $plugins[ $index ] ); 722 723 // Store list of paused plugins for displaying an admin notice. 724 $GLOBALS['_paused_plugins'][ $plugin ] = $paused_plugins[ $plugin ]; 725 } 726 } 727 728 return $plugins; 729 } 730 731 /** 732 * Retrieves an array of active and valid themes. 733 * 734 * While upgrading or installing WordPress, no themes are returned. 735 * 736 * @since 5.1.0 737 * @access private 738 * 739 * @return array Array of paths to theme directories. 740 */ 741 function wp_get_active_and_valid_themes() { 742 global $pagenow; 743 744 $themes = array(); 745 746 if ( wp_installing() && 'wp-activate.php' !== $pagenow ) { 747 return $themes; 748 } 749 750 if ( TEMPLATEPATH !== STYLESHEETPATH ) { 751 $themes[] = STYLESHEETPATH; 752 } 753 754 $themes[] = TEMPLATEPATH; 755 756 /* 757 * Remove themes from the list of active themes when we're on an endpoint 758 * that should be protected against WSODs and the theme is paused. 759 */ 760 if ( wp_is_recovery_mode() ) { 761 $themes = wp_skip_paused_themes( $themes ); 762 763 // If no active and valid themes exist, skip loading themes. 764 if ( empty( $themes ) ) { 765 add_filter( 'wp_using_themes', '__return_false' ); 766 } 767 } 768 769 return $themes; 770 } 771 772 /** 773 * Filters a given list of themes, removing any paused themes from it. 774 * 775 * @since 5.2.0 776 * 777 * @param array $themes List of absolute theme directory paths. 778 * @return array Filtered value of $themes, without any paused themes. 779 */ 780 function wp_skip_paused_themes( array $themes ) { 781 $paused_themes = wp_paused_themes()->get_all(); 782 783 if ( empty( $paused_themes ) ) { 784 return $themes; 785 } 786 787 foreach ( $themes as $index => $theme ) { 788 $theme = basename( $theme ); 789 790 if ( array_key_exists( $theme, $paused_themes ) ) { 791 unset( $themes[ $index ] ); 792 793 // Store list of paused themes for displaying an admin notice. 794 $GLOBALS['_paused_themes'][ $theme ] = $paused_themes[ $theme ]; 795 } 796 } 797 798 return $themes; 799 } 800 801 /** 802 * Is WordPress in Recovery Mode. 803 * 804 * In this mode, plugins or themes that cause WSODs will be paused. 805 * 806 * @since 5.2.0 807 * 808 * @return bool 809 */ 810 function wp_is_recovery_mode() { 811 return wp_recovery_mode()->is_active(); 812 } 813 814 /** 815 * Determines whether we are currently on an endpoint that should be protected against WSODs. 816 * 817 * @since 5.2.0 818 * 819 * @return bool True if the current endpoint should be protected. 820 */ 821 function is_protected_endpoint() { 822 // Protect login pages. 823 if ( isset( $GLOBALS['pagenow'] ) && 'wp-login.php' === $GLOBALS['pagenow'] ) { 824 return true; 825 } 826 827 // Protect the admin backend. 828 if ( is_admin() && ! wp_doing_ajax() ) { 829 return true; 830 } 831 832 // Protect AJAX actions that could help resolve a fatal error should be available. 833 if ( is_protected_ajax_action() ) { 834 return true; 835 } 836 837 /** 838 * Filters whether the current request is against a protected endpoint. 839 * 840 * This filter is only fired when an endpoint is requested which is not already protected by 841 * WordPress core. As such, it exclusively allows providing further protected endpoints in 842 * addition to the admin backend, login pages and protected AJAX actions. 843 * 844 * @since 5.2.0 845 * 846 * @param bool $is_protected_endpoint Whether the currently requested endpoint is protected. Default false. 847 */ 848 return (bool) apply_filters( 'is_protected_endpoint', false ); 849 } 850 851 /** 852 * Determines whether we are currently handling an AJAX action that should be protected against WSODs. 853 * 854 * @since 5.2.0 855 * 856 * @return bool True if the current AJAX action should be protected. 857 */ 858 function is_protected_ajax_action() { 859 if ( ! wp_doing_ajax() ) { 860 return false; 861 } 862 863 if ( ! isset( $_REQUEST['action'] ) ) { 864 return false; 865 } 866 867 $actions_to_protect = array( 868 'edit-theme-plugin-file', // Saving changes in the core code editor. 869 'heartbeat', // Keep the heart beating. 870 'install-plugin', // Installing a new plugin. 871 'install-theme', // Installing a new theme. 872 'search-plugins', // Searching in the list of plugins. 873 'search-install-plugins', // Searching for a plugin in the plugin install screen. 874 'update-plugin', // Update an existing plugin. 875 'update-theme', // Update an existing theme. 876 ); 877 878 /** 879 * Filters the array of protected AJAX actions. 880 * 881 * This filter is only fired when doing AJAX and the AJAX request has an 'action' property. 882 * 883 * @since 5.2.0 884 * 885 * @param array $actions_to_protect Array of strings with AJAX actions to protect. 886 */ 887 $actions_to_protect = (array) apply_filters( 'wp_protected_ajax_actions', $actions_to_protect ); 888 889 if ( ! in_array( $_REQUEST['action'], $actions_to_protect, true ) ) { 890 return false; 891 } 892 893 return true; 894 } 895 896 /** 897 * Set internal encoding. 898 * 899 * In most cases the default internal encoding is latin1, which is 900 * of no use, since we want to use the `mb_` functions for `utf-8` strings. 901 * 902 * @since 3.0.0 903 * @access private 904 */ 905 function wp_set_internal_encoding() { 906 if ( function_exists( 'mb_internal_encoding' ) ) { 907 $charset = get_option( 'blog_charset' ); 908 // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged 909 if ( ! $charset || ! @mb_internal_encoding( $charset ) ) { 910 mb_internal_encoding( 'UTF-8' ); 911 } 912 } 913 } 914 915 /** 916 * Add magic quotes to `$_GET`, `$_POST`, `$_COOKIE`, and `$_SERVER`. 917 * 918 * Also forces `$_REQUEST` to be `$_GET + $_POST`. If `$_SERVER`, 919 * `$_COOKIE`, or `$_ENV` are needed, use those superglobals directly. 920 * 921 * @since 3.0.0 922 * @access private 923 */ 924 function wp_magic_quotes() { 925 // Escape with wpdb. 926 $_GET = add_magic_quotes( $_GET ); 927 $_POST = add_magic_quotes( $_POST ); 928 $_COOKIE = add_magic_quotes( $_COOKIE ); 929 $_SERVER = add_magic_quotes( $_SERVER ); 930 931 // Force REQUEST to be GET + POST. 932 $_REQUEST = array_merge( $_GET, $_POST ); 933 } 934 935 /** 936 * Runs just before PHP shuts down execution. 937 * 938 * @since 1.2.0 939 * @access private 940 */ 941 function shutdown_action_hook() { 942 /** 943 * Fires just before PHP shuts down execution. 944 * 945 * @since 1.2.0 946 */ 947 do_action( 'shutdown' ); 948 949 wp_cache_close(); 950 } 951 952 /** 953 * Copy an object. 954 * 955 * @since 2.7.0 956 * @deprecated 3.2.0 957 * 958 * @param object $object The object to clone. 959 * @return object The cloned object. 960 */ 961 function wp_clone( $object ) { 962 // Use parens for clone to accommodate PHP 4. See #17880 963 return clone( $object ); 964 } 965 966 /** 967 * Determines whether the current request is for an administrative interface page. 968 * 969 * Does not check if the user is an administrator; use current_user_can() 970 * for checking roles and capabilities. 971 * 972 * For more information on this and similar theme functions, check out 973 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 974 * Conditional Tags} article in the Theme Developer Handbook. 975 * 976 * @since 1.5.1 977 * 978 * @global WP_Screen $current_screen WordPress current screen object. 979 * 980 * @return bool True if inside WordPress administration interface, false otherwise. 981 */ 982 function is_admin() { 983 if ( isset( $GLOBALS['current_screen'] ) ) { 984 return $GLOBALS['current_screen']->in_admin(); 985 } elseif ( defined( 'WP_ADMIN' ) ) { 986 return WP_ADMIN; 987 } 988 989 return false; 990 } 991 992 /** 993 * Whether the current request is for a site's admininstrative interface. 994 * 995 * e.g. `/wp-admin/` 996 * 997 * Does not check if the user is an administrator; use current_user_can() 998 * for checking roles and capabilities. 999 * 1000 * @since 3.1.0 1001 * 1002 * @global WP_Screen $current_screen WordPress current screen object. 1003 * 1004 * @return bool True if inside WordPress blog administration pages. 1005 */ 1006 function is_blog_admin() { 1007 if ( isset( $GLOBALS['current_screen'] ) ) { 1008 return $GLOBALS['current_screen']->in_admin( 'site' ); 1009 } elseif ( defined( 'WP_BLOG_ADMIN' ) ) { 1010 return WP_BLOG_ADMIN; 1011 } 1012 1013 return false; 1014 } 1015 1016 /** 1017 * Whether the current request is for the network administrative interface. 1018 * 1019 * e.g. `/wp-admin/network/` 1020 * 1021 * Does not check if the user is an administrator; use current_user_can() 1022 * for checking roles and capabilities. 1023 * 1024 * Does not check if the site is a Multisite network; use is_multisite() 1025 * for checking if Multisite is enabled. 1026 * 1027 * @since 3.1.0 1028 * 1029 * @global WP_Screen $current_screen WordPress current screen object. 1030 * 1031 * @return bool True if inside WordPress network administration pages. 1032 */ 1033 function is_network_admin() { 1034 if ( isset( $GLOBALS['current_screen'] ) ) { 1035 return $GLOBALS['current_screen']->in_admin( 'network' ); 1036 } elseif ( defined( 'WP_NETWORK_ADMIN' ) ) { 1037 return WP_NETWORK_ADMIN; 1038 } 1039 1040 return false; 1041 } 1042 1043 /** 1044 * Whether the current request is for a user admin screen. 1045 * 1046 * e.g. `/wp-admin/user/` 1047 * 1048 * Does not check if the user is an administrator; use current_user_can() 1049 * for checking roles and capabilities. 1050 * 1051 * @since 3.1.0 1052 * 1053 * @global WP_Screen $current_screen WordPress current screen object. 1054 * 1055 * @return bool True if inside WordPress user administration pages. 1056 */ 1057 function is_user_admin() { 1058 if ( isset( $GLOBALS['current_screen'] ) ) { 1059 return $GLOBALS['current_screen']->in_admin( 'user' ); 1060 } elseif ( defined( 'WP_USER_ADMIN' ) ) { 1061 return WP_USER_ADMIN; 1062 } 1063 1064 return false; 1065 } 1066 1067 /** 1068 * If Multisite is enabled. 1069 * 1070 * @since 3.0.0 1071 * 1072 * @return bool True if Multisite is enabled, false otherwise. 1073 */ 1074 function is_multisite() { 1075 if ( defined( 'MULTISITE' ) ) { 1076 return MULTISITE; 1077 } 1078 1079 if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) ) { 1080 return true; 1081 } 1082 1083 return false; 1084 } 1085 1086 /** 1087 * Retrieve the current site ID. 1088 * 1089 * @since 3.1.0 1090 * 1091 * @global int $blog_id 1092 * 1093 * @return int Site ID. 1094 */ 1095 function get_current_blog_id() { 1096 global $blog_id; 1097 return absint( $blog_id ); 1098 } 1099 1100 /** 1101 * Retrieves the current network ID. 1102 * 1103 * @since 4.6.0 1104 * 1105 * @return int The ID of the current network. 1106 */ 1107 function get_current_network_id() { 1108 if ( ! is_multisite() ) { 1109 return 1; 1110 } 1111 1112 $current_network = get_network(); 1113 1114 if ( ! isset( $current_network->id ) ) { 1115 return get_main_network_id(); 1116 } 1117 1118 return absint( $current_network->id ); 1119 } 1120 1121 /** 1122 * Attempt an early load of translations. 1123 * 1124 * Used for errors encountered during the initial loading process, before 1125 * the locale has been properly detected and loaded. 1126 * 1127 * Designed for unusual load sequences (like setup-config.php) or for when 1128 * the script will then terminate with an error, otherwise there is a risk 1129 * that a file can be double-included. 1130 * 1131 * @since 3.4.0 1132 * @access private 1133 * 1134 * @global WP_Locale $wp_locale WordPress date and time locale object. 1135 * 1136 * @staticvar bool $loaded 1137 */ 1138 function wp_load_translations_early() { 1139 global $wp_locale; 1140 1141 static $loaded = false; 1142 if ( $loaded ) { 1143 return; 1144 } 1145 $loaded = true; 1146 1147 if ( function_exists( 'did_action' ) && did_action( 'init' ) ) { 1148 return; 1149 } 1150 1151 // We need $wp_local_package 1152 require ABSPATH . WPINC . '/version.php'; 1153 1154 // Translation and localization 1155 require_once ABSPATH . WPINC . '/pomo/mo.php'; 1156 require_once ABSPATH . WPINC . '/l10n.php'; 1157 require_once ABSPATH . WPINC . '/class-wp-locale.php'; 1158 require_once ABSPATH . WPINC . '/class-wp-locale-switcher.php'; 1159 1160 // General libraries 1161 require_once ABSPATH . WPINC . '/plugin.php'; 1162 1163 $locales = array(); 1164 $locations = array(); 1165 1166 while ( true ) { 1167 if ( defined( 'WPLANG' ) ) { 1168 if ( '' == WPLANG ) { 1169 break; 1170 } 1171 $locales[] = WPLANG; 1172 } 1173 1174 if ( isset( $wp_local_package ) ) { 1175 $locales[] = $wp_local_package; 1176 } 1177 1178 if ( ! $locales ) { 1179 break; 1180 } 1181 1182 if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) ) { 1183 $locations[] = WP_LANG_DIR; 1184 } 1185 1186 if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) ) { 1187 $locations[] = WP_CONTENT_DIR . '/languages'; 1188 } 1189 1190 if ( @is_dir( ABSPATH . 'wp-content/languages' ) ) { 1191 $locations[] = ABSPATH . 'wp-content/languages'; 1192 } 1193 1194 if ( @is_dir( ABSPATH . WPINC . '/languages' ) ) { 1195 $locations[] = ABSPATH . WPINC . '/languages'; 1196 } 1197 1198 if ( ! $locations ) { 1199 break; 1200 } 1201 1202 $locations = array_unique( $locations ); 1203 1204 foreach ( $locales as $locale ) { 1205 foreach ( $locations as $location ) { 1206 if ( file_exists( $location . '/' . $locale . '.mo' ) ) { 1207 load_textdomain( 'default', $location . '/' . $locale . '.mo' ); 1208 if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) ) { 1209 load_textdomain( 'default', $location . '/admin-' . $locale . '.mo' ); 1210 } 1211 break 2; 1212 } 1213 } 1214 } 1215 1216 break; 1217 } 1218 1219 $wp_locale = new WP_Locale(); 1220 } 1221 1222 /** 1223 * Check or set whether WordPress is in "installation" mode. 1224 * 1225 * If the `WP_INSTALLING` constant is defined during the bootstrap, `wp_installing()` will default to `true`. 1226 * 1227 * @since 4.4.0 1228 * 1229 * @staticvar bool $installing 1230 * 1231 * @param bool $is_installing Optional. True to set WP into Installing mode, false to turn Installing mode off. 1232 * Omit this parameter if you only want to fetch the current status. 1233 * @return bool True if WP is installing, otherwise false. When a `$is_installing` is passed, the function will 1234 * report whether WP was in installing mode prior to the change to `$is_installing`. 1235 */ 1236 function wp_installing( $is_installing = null ) { 1237 static $installing = null; 1238 1239 // Support for the `WP_INSTALLING` constant, defined before WP is loaded. 1240 if ( is_null( $installing ) ) { 1241 $installing = defined( 'WP_INSTALLING' ) && WP_INSTALLING; 1242 } 1243 1244 if ( ! is_null( $is_installing ) ) { 1245 $old_installing = $installing; 1246 $installing = $is_installing; 1247 return (bool) $old_installing; 1248 } 1249 1250 return (bool) $installing; 1251 } 1252 1253 /** 1254 * Determines if SSL is used. 1255 * 1256 * @since 2.6.0 1257 * @since 4.6.0 Moved from functions.php to load.php. 1258 * 1259 * @return bool True if SSL, otherwise false. 1260 */ 1261 function is_ssl() { 1262 if ( isset( $_SERVER['HTTPS'] ) ) { 1263 if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) { 1264 return true; 1265 } 1266 1267 if ( '1' == $_SERVER['HTTPS'] ) { 1268 return true; 1269 } 1270 } elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) { 1271 return true; 1272 } 1273 return false; 1274 } 1275 1276 /** 1277 * Converts a shorthand byte value to an integer byte value. 1278 * 1279 * @since 2.3.0 1280 * @since 4.6.0 Moved from media.php to load.php. 1281 * 1282 * @link https://secure.php.net/manual/en/function.ini-get.php 1283 * @link https://secure.php.net/manual/en/faq.using.php#faq.using.shorthandbytes 1284 * 1285 * @param string $value A (PHP ini) byte value, either shorthand or ordinary. 1286 * @return int An integer byte value. 1287 */ 1288 function wp_convert_hr_to_bytes( $value ) { 1289 $value = strtolower( trim( $value ) ); 1290 $bytes = (int) $value; 1291 1292 if ( false !== strpos( $value, 'g' ) ) { 1293 $bytes *= GB_IN_BYTES; 1294 } elseif ( false !== strpos( $value, 'm' ) ) { 1295 $bytes *= MB_IN_BYTES; 1296 } elseif ( false !== strpos( $value, 'k' ) ) { 1297 $bytes *= KB_IN_BYTES; 1298 } 1299 1300 // Deal with large (float) values which run into the maximum integer size. 1301 return min( $bytes, PHP_INT_MAX ); 1302 } 1303 1304 /** 1305 * Determines whether a PHP ini value is changeable at runtime. 1306 * 1307 * @since 4.6.0 1308 * 1309 * @staticvar array $ini_all 1310 * 1311 * @link https://secure.php.net/manual/en/function.ini-get-all.php 1312 * 1313 * @param string $setting The name of the ini setting to check. 1314 * @return bool True if the value is changeable at runtime. False otherwise. 1315 */ 1316 function wp_is_ini_value_changeable( $setting ) { 1317 static $ini_all; 1318 1319 if ( ! isset( $ini_all ) ) { 1320 $ini_all = false; 1321 // Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes". 1322 if ( function_exists( 'ini_get_all' ) ) { 1323 $ini_all = ini_get_all(); 1324 } 1325 } 1326 1327 // 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. 1328 if ( isset( $ini_all[ $setting ]['access'] ) && ( INI_ALL === ( $ini_all[ $setting ]['access'] & 7 ) || INI_USER === ( $ini_all[ $setting ]['access'] & 7 ) ) ) { 1329 return true; 1330 } 1331 1332 // If we were unable to retrieve the details, fail gracefully to assume it's changeable. 1333 if ( ! is_array( $ini_all ) ) { 1334 return true; 1335 } 1336 1337 return false; 1338 } 1339 1340 /** 1341 * Determines whether the current request is a WordPress Ajax request. 1342 * 1343 * @since 4.7.0 1344 * 1345 * @return bool True if it's a WordPress Ajax request, false otherwise. 1346 */ 1347 function wp_doing_ajax() { 1348 /** 1349 * Filters whether the current request is a WordPress Ajax request. 1350 * 1351 * @since 4.7.0 1352 * 1353 * @param bool $wp_doing_ajax Whether the current request is a WordPress Ajax request. 1354 */ 1355 return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX ); 1356 } 1357 1358 /** 1359 * Determines whether the current request should use themes. 1360 * 1361 * @since 5.1.0 1362 * 1363 * @return bool True if themes should be used, false otherwise. 1364 */ 1365 function wp_using_themes() { 1366 /** 1367 * Filters whether the current request should use themes. 1368 * 1369 * @since 5.1.0 1370 * 1371 * @param bool $wp_using_themes Whether the current request should use themes. 1372 */ 1373 return apply_filters( 'wp_using_themes', defined( 'WP_USE_THEMES' ) && WP_USE_THEMES ); 1374 } 1375 1376 /** 1377 * Determines whether the current request is a WordPress cron request. 1378 * 1379 * @since 4.8.0 1380 * 1381 * @return bool True if it's a WordPress cron request, false otherwise. 1382 */ 1383 function wp_doing_cron() { 1384 /** 1385 * Filters whether the current request is a WordPress cron request. 1386 * 1387 * @since 4.8.0 1388 * 1389 * @param bool $wp_doing_cron Whether the current request is a WordPress cron request. 1390 */ 1391 return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON ); 1392 } 1393 1394 /** 1395 * Check whether variable is a WordPress Error. 1396 * 1397 * Returns true if $thing is an object of the WP_Error class. 1398 * 1399 * @since 2.1.0 1400 * 1401 * @param mixed $thing Check if unknown variable is a WP_Error object. 1402 * @return bool True, if WP_Error. False, if not WP_Error. 1403 */ 1404 function is_wp_error( $thing ) { 1405 return ( $thing instanceof WP_Error ); 1406 } 1407 1408 /** 1409 * Determines whether file modifications are allowed. 1410 * 1411 * @since 4.8.0 1412 * 1413 * @param string $context The usage context. 1414 * @return bool True if file modification is allowed, false otherwise. 1415 */ 1416 function wp_is_file_mod_allowed( $context ) { 1417 /** 1418 * Filters whether file modifications are allowed. 1419 * 1420 * @since 4.8.0 1421 * 1422 * @param bool $file_mod_allowed Whether file modifications are allowed. 1423 * @param string $context The usage context. 1424 */ 1425 return apply_filters( 'file_mod_allowed', ! defined( 'DISALLOW_FILE_MODS' ) || ! DISALLOW_FILE_MODS, $context ); 1426 } 1427 1428 /** 1429 * Start scraping edited file errors. 1430 * 1431 * @since 4.9.0 1432 */ 1433 function wp_start_scraping_edited_file_errors() { 1434 if ( ! isset( $_REQUEST['wp_scrape_key'] ) || ! isset( $_REQUEST['wp_scrape_nonce'] ) ) { 1435 return; 1436 } 1437 $key = substr( sanitize_key( wp_unslash( $_REQUEST['wp_scrape_key'] ) ), 0, 32 ); 1438 $nonce = wp_unslash( $_REQUEST['wp_scrape_nonce'] ); 1439 1440 if ( get_transient( 'scrape_key_' . $key ) !== $nonce ) { 1441 echo "###### wp_scraping_result_start:$key ######"; 1442 echo wp_json_encode( 1443 array( 1444 'code' => 'scrape_nonce_failure', 1445 'message' => __( 'Scrape nonce check failed. Please try again.' ), 1446 ) 1447 ); 1448 echo "###### wp_scraping_result_end:$key ######"; 1449 die(); 1450 } 1451 if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) { 1452 define( 'WP_SANDBOX_SCRAPING', true ); 1453 } 1454 register_shutdown_function( 'wp_finalize_scraping_edited_file_errors', $key ); 1455 } 1456 1457 /** 1458 * Finalize scraping for edited file errors. 1459 * 1460 * @since 4.9.0 1461 * 1462 * @param string $scrape_key Scrape key. 1463 */ 1464 function wp_finalize_scraping_edited_file_errors( $scrape_key ) { 1465 $error = error_get_last(); 1466 echo "\n###### wp_scraping_result_start:$scrape_key ######\n"; 1467 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 ) ) { 1468 $error = str_replace( ABSPATH, '', $error ); 1469 echo wp_json_encode( $error ); 1470 } else { 1471 echo wp_json_encode( true ); 1472 } 1473 echo "\n###### wp_scraping_result_end:$scrape_key ######\n"; 1474 } 1475 1476 /** 1477 * Checks whether current request is a JSON request, or is expecting a JSON response. 1478 * 1479 * @since 5.0.0 1480 * 1481 * @return bool True if Accepts or Content-Type headers contain application/json, false otherwise. 1482 */ 1483 function wp_is_json_request() { 1484 1485 if ( isset( $_SERVER['HTTP_ACCEPT'] ) && false !== strpos( $_SERVER['HTTP_ACCEPT'], 'application/json' ) ) { 1486 return true; 1487 } 1488 1489 if ( isset( $_SERVER['CONTENT_TYPE'] ) && 'application/json' === $_SERVER['CONTENT_TYPE'] ) { 1490 return true; 1491 } 1492 1493 return false; 1494 1495 } 1496 1497 /** 1498 * Checks whether current request is a JSONP request, or is expecting a JSONP response. 1499 * 1500 * @since 5.2.0 1501 * 1502 * @return bool True if JSONP request, false otherwise. 1503 */ 1504 function wp_is_jsonp_request() { 1505 if ( ! isset( $_GET['_jsonp'] ) ) { 1506 return false; 1507 } 1508 1509 if ( ! function_exists( 'wp_check_jsonp_callback' ) ) { 1510 require_once ABSPATH . WPINC . '/functions.php'; 1511 } 1512 1513 $jsonp_callback = $_GET['_jsonp']; 1514 if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) { 1515 return false; 1516 } 1517 1518 /** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */ 1519 $jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true ); 1520 1521 return $jsonp_enabled; 1522 1523 } 1524 1525 /** 1526 * Checks whether current request is an XML request, or is expecting an XML response. 1527 * 1528 * @since 5.2.0 1529 * 1530 * @return bool True if Accepts or Content-Type headers contain xml, false otherwise. 1531 */ 1532 function wp_is_xml_request() { 1533 $accepted = array( 1534 'text/xml', 1535 'application/rss+xml', 1536 'application/atom+xml', 1537 'application/rdf+xml', 1538 'text/xml+oembed', 1539 'application/xml+oembed', 1540 ); 1541 1542 if ( isset( $_SERVER['HTTP_ACCEPT'] ) ) { 1543 foreach ( $accepted as $type ) { 1544 if ( false !== strpos( $_SERVER['HTTP_ACCEPT'], $type ) ) { 1545 return true; 1546 } 1547 } 1548 } 1549 1550 if ( isset( $_SERVER['CONTENT_TYPE'] ) && in_array( $_SERVER['CONTENT_TYPE'], $accepted, true ) ) { 1551 return true; 1552 } 1553 1554 return false; 1555 }
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| Generated: Wed Oct 16 08:20:01 2019 | Cross-referenced by PHPXref 0.7 |