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   1  <?php
   2  /**
   3   * These functions are needed to load WordPress.
   4   *
   5   * @internal This file must be parsable by PHP4.
   6   *
   7   * @package WordPress
   8   */
   9  
  10  /**
  11   * Turn register globals off.
  12   *
  13   * @access private
  14   * @since 2.1.0
  15   * @return null Will return null if register_globals PHP directive was disabled
  16   */
  17  function wp_unregister_GLOBALS() {
  18      if ( !ini_get( 'register_globals' ) )
  19          return;
  20  
  21      if ( isset( $_REQUEST['GLOBALS'] ) )
  22          die( 'GLOBALS overwrite attempt detected' );
  23  
  24      // Variables that shouldn't be unset
  25      $no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES', 'table_prefix' );
  26  
  27      $input = array_merge( $_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset( $_SESSION ) && is_array( $_SESSION ) ? $_SESSION : array() );
  28      foreach ( $input as $k => $v )
  29          if ( !in_array( $k, $no_unset ) && isset( $GLOBALS[$k] ) ) {
  30              unset( $GLOBALS[$k] );
  31          }
  32  }
  33  
  34  /**
  35   * Fix $_SERVER variables for various setups.
  36   *
  37   * @access private
  38   * @since 3.0.0
  39   */
  40  function wp_fix_server_vars() {
  41      global $PHP_SELF;
  42  
  43      $default_server_values = array(
  44          'SERVER_SOFTWARE' => '',
  45          'REQUEST_URI' => '',
  46      );
  47  
  48      $_SERVER = array_merge( $default_server_values, $_SERVER );
  49  
  50      // Fix for IIS when running with PHP ISAPI
  51      if ( empty( $_SERVER['REQUEST_URI'] ) || ( php_sapi_name() != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
  52  
  53          // IIS Mod-Rewrite
  54          if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
  55              $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
  56          }
  57          // IIS Isapi_Rewrite
  58          else if ( isset( $_SERVER['HTTP_X_REWRITE_URL'] ) ) {
  59              $_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
  60          } else {
  61              // Use ORIG_PATH_INFO if there is no PATH_INFO
  62              if ( !isset( $_SERVER['PATH_INFO'] ) && isset( $_SERVER['ORIG_PATH_INFO'] ) )
  63                  $_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO'];
  64  
  65              // Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)
  66              if ( isset( $_SERVER['PATH_INFO'] ) ) {
  67                  if ( $_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME'] )
  68                      $_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO'];
  69                  else
  70                      $_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
  71              }
  72  
  73              // Append the query string if it exists and isn't null
  74              if ( ! empty( $_SERVER['QUERY_STRING'] ) ) {
  75                  $_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING'];
  76              }
  77          }
  78      }
  79  
  80      // Fix for PHP as CGI hosts that set SCRIPT_FILENAME to something ending in php.cgi for all requests
  81      if ( isset( $_SERVER['SCRIPT_FILENAME'] ) && ( strpos( $_SERVER['SCRIPT_FILENAME'], 'php.cgi' ) == strlen( $_SERVER['SCRIPT_FILENAME'] ) - 7 ) )
  82          $_SERVER['SCRIPT_FILENAME'] = $_SERVER['PATH_TRANSLATED'];
  83  
  84      // Fix for Dreamhost and other PHP as CGI hosts
  85      if ( strpos( $_SERVER['SCRIPT_NAME'], 'php.cgi' ) !== false )
  86          unset( $_SERVER['PATH_INFO'] );
  87  
  88      // Fix empty PHP_SELF
  89      $PHP_SELF = $_SERVER['PHP_SELF'];
  90      if ( empty( $PHP_SELF ) )
  91          $_SERVER['PHP_SELF'] = $PHP_SELF = preg_replace( '/(\?.*)?$/', '', $_SERVER["REQUEST_URI"] );
  92  }
  93  
  94  /**
  95   * Check for the required PHP version, and the MySQL extension or a database drop-in.
  96   *
  97   * Dies if requirements are not met.
  98   *
  99   * @access private
 100   * @since 3.0.0
 101   */
 102  function wp_check_php_mysql_versions() {
 103      global $required_php_version, $wp_version;
 104      $php_version = phpversion();
 105      if ( version_compare( $required_php_version, $php_version, '>' ) ) {
 106          wp_load_translations_early();
 107          die( sprintf( __( 'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.' ), $php_version, $wp_version, $required_php_version ) );
 108      }
 109  
 110      if ( ! extension_loaded( 'mysql' ) && ! file_exists( WP_CONTENT_DIR . '/db.php' ) ) {
 111          wp_load_translations_early();
 112          die( __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ) );
 113      }
 114  }
 115  
 116  /**
 117   * Don't load all of WordPress when handling a favicon.ico request.
 118   * Instead, send the headers for a zero-length favicon and bail.
 119   *
 120   * @since 3.0.0
 121   */
 122  function wp_favicon_request() {
 123      if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) {
 124          header('Content-Type: image/vnd.microsoft.icon');
 125          header('Content-Length: 0');
 126          exit;
 127      }
 128  }
 129  
 130  /**
 131   * Dies with a maintenance message when conditions are met.
 132   *
 133   * Checks for a file in the WordPress root directory named ".maintenance".
 134   * This file will contain the variable $upgrading, set to the time the file
 135   * was created. If the file was created less than 10 minutes ago, WordPress
 136   * enters maintenance mode and displays a message.
 137   *
 138   * The default message can be replaced by using a drop-in (maintenance.php in
 139   * the wp-content directory).
 140   *
 141   * @access private
 142   * @since 3.0.0
 143   */
 144  function wp_maintenance() {
 145      if ( !file_exists( ABSPATH . '.maintenance' ) || defined( 'WP_INSTALLING' ) )
 146          return;
 147  
 148      global $upgrading;
 149  
 150      include( ABSPATH . '.maintenance' );
 151      // If the $upgrading timestamp is older than 10 minutes, don't die.
 152      if ( ( time() - $upgrading ) >= 600 )
 153          return;
 154  
 155      if ( file_exists( WP_CONTENT_DIR . '/maintenance.php' ) ) {
 156          require_once( WP_CONTENT_DIR . '/maintenance.php' );
 157          die();
 158      }
 159  
 160      wp_load_translations_early();
 161  
 162      $protocol = $_SERVER["SERVER_PROTOCOL"];
 163      if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )
 164          $protocol = 'HTTP/1.0';
 165      header( "$protocol 503 Service Unavailable", true, 503 );
 166      header( 'Content-Type: text/html; charset=utf-8' );
 167      header( 'Retry-After: 600' );
 168  ?>
 169      <!DOCTYPE html>
 170      <html xmlns="http://www.w3.org/1999/xhtml"<?php if ( is_rtl() ) echo ' dir="rtl"'; ?>>
 171      <head>
 172      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 173          <title><?php _e( 'Maintenance' ); ?></title>
 174  
 175      </head>
 176      <body>
 177          <h1><?php _e( 'Briefly unavailable for scheduled maintenance. Check back in a minute.' ); ?></h1>
 178      </body>
 179      </html>
 180  <?php
 181      die();
 182  }
 183  
 184  /**
 185   * PHP 5 standard microtime start capture.
 186   *
 187   * @access private
 188   * @since 0.71
 189   * @global float $timestart Seconds from when function is called.
 190   * @return bool Always returns true.
 191   */
 192  function timer_start() {
 193      global $timestart;
 194      $timestart = microtime( true );
 195      return true;
 196  }
 197  
 198  /**
 199   * Return and/or display the time from the page start to when function is called.
 200   *
 201   * You can get the results and print them by doing:
 202   * <code>
 203   * $nTimePageTookToExecute = timer_stop();
 204   * echo $nTimePageTookToExecute;
 205   * </code>
 206   *
 207   * Or instead, you can do:
 208   * <code>
 209   * timer_stop(1);
 210   * </code>
 211   * which will do what the above does. If you need the result, you can assign it to a variable, but
 212   * in most cases, you only need to echo it.
 213   *
 214   * @since 0.71
 215   * @global float $timestart Seconds from when timer_start() is called
 216   * @global float $timeend Seconds from when function is called
 217   *
 218   * @param int $display Use '0' or null to not echo anything and 1 to echo the total time
 219   * @param int $precision The amount of digits from the right of the decimal to display. Default is 3.
 220   * @return float The "second.microsecond" finished time calculation
 221   */
 222  function timer_stop( $display = 0, $precision = 3 ) { // if called like timer_stop(1), will echo $timetotal
 223      global $timestart, $timeend;
 224      $timeend = microtime( true );
 225      $timetotal = $timeend - $timestart;
 226      $r = ( function_exists( 'number_format_i18n' ) ) ? number_format_i18n( $timetotal, $precision ) : number_format( $timetotal, $precision );
 227      if ( $display )
 228          echo $r;
 229      return $r;
 230  }
 231  
 232  /**
 233   * Sets PHP error handling and handles WordPress debug mode.
 234   *
 235   * Uses three constants: WP_DEBUG, WP_DEBUG_DISPLAY, and WP_DEBUG_LOG. All three can be
 236   * defined in wp-config.php. Example: <code> define( 'WP_DEBUG', true ); </code>
 237   *
 238   * WP_DEBUG_DISPLAY and WP_DEBUG_LOG perform no function unless WP_DEBUG is true.
 239   * WP_DEBUG defaults to false.
 240   *
 241   * When WP_DEBUG is true, all PHP notices are reported. WordPress will also display
 242   * notices, including one when a deprecated WordPress function, function argument,
 243   * or file is used. Deprecated code may be removed from a later version.
 244   *
 245   * It is strongly recommended that plugin and theme developers use WP_DEBUG in their
 246   * development environments.
 247   *
 248   * When WP_DEBUG_DISPLAY is true, WordPress will force errors to be displayed.
 249   * WP_DEBUG_DISPLAY defaults to true. Defining it as null prevents WordPress from
 250   * changing the global configuration setting. Defining WP_DEBUG_DISPLAY as false
 251   * will force errors to be hidden.
 252   *
 253   * When WP_DEBUG_LOG is true, errors will be logged to wp-content/debug.log.
 254   * WP_DEBUG_LOG defaults to false.
 255   *
 256   * Errors are never displayed for XML-RPC requests.
 257   *
 258   * @access private
 259   * @since 3.0.0
 260   */
 261  function wp_debug_mode() {
 262      if ( WP_DEBUG ) {
 263          error_reporting( E_ALL );
 264  
 265          if ( WP_DEBUG_DISPLAY )
 266              ini_set( 'display_errors', 1 );
 267          elseif ( null !== WP_DEBUG_DISPLAY )
 268              ini_set( 'display_errors', 0 );
 269  
 270          if ( WP_DEBUG_LOG ) {
 271              ini_set( 'log_errors', 1 );
 272              ini_set( 'error_log', WP_CONTENT_DIR . '/debug.log' );
 273          }
 274      } else {
 275          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 );
 276      }
 277      if ( defined( 'XMLRPC_REQUEST' ) )
 278          ini_set( 'display_errors', 0 );
 279  }
 280  
 281  /**
 282   * Sets the location of the language directory.
 283   *
 284   * To set directory manually, define <code>WP_LANG_DIR</code> in wp-config.php.
 285   *
 286   * If the language directory exists within WP_CONTENT_DIR, that is used.
 287   * Otherwise if the language directory exists within WPINC, that's used.
 288   * Finally, if neither of the preceding directories are found,
 289   * WP_CONTENT_DIR/languages is used.
 290   *
 291   * The WP_LANG_DIR constant was introduced in 2.1.0.
 292   *
 293   * @access private
 294   * @since 3.0.0
 295   */
 296  function wp_set_lang_dir() {
 297      if ( !defined( 'WP_LANG_DIR' ) ) {
 298          if ( file_exists( WP_CONTENT_DIR . '/languages' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) || !@is_dir(ABSPATH . WPINC . '/languages') ) {
 299              define( 'WP_LANG_DIR', WP_CONTENT_DIR . '/languages' ); // no leading slash, no trailing slash, full path, not relative to ABSPATH
 300              if ( !defined( 'LANGDIR' ) ) {
 301                  // Old static relative path maintained for limited backwards compatibility - won't work in some cases
 302                  define( 'LANGDIR', 'wp-content/languages' );
 303              }
 304          } else {
 305              define( 'WP_LANG_DIR', ABSPATH . WPINC . '/languages' ); // no leading slash, no trailing slash, full path, not relative to ABSPATH
 306              if ( !defined( 'LANGDIR' ) ) {
 307                  // Old relative path maintained for backwards compatibility
 308                  define( 'LANGDIR', WPINC . '/languages' );
 309              }
 310          }
 311      }
 312  }
 313  
 314  /**
 315   * Load the correct database class file.
 316   *
 317   * This function is used to load the database class file either at runtime or by
 318   * wp-admin/setup-config.php. We must globalize $wpdb to ensure that it is
 319   * defined globally by the inline code in wp-db.php.
 320   *
 321   * @since 2.5.0
 322   * @global $wpdb WordPress Database Object
 323   */
 324  function require_wp_db() {
 325      global $wpdb;
 326  
 327      require_once ( ABSPATH . WPINC . '/wp-db.php' );
 328      if ( file_exists( WP_CONTENT_DIR . '/db.php' ) )
 329          require_once( WP_CONTENT_DIR . '/db.php' );
 330  
 331      if ( isset( $wpdb ) )
 332          return;
 333  
 334      $wpdb = new wpdb( DB_USER, DB_PASSWORD, DB_NAME, DB_HOST );
 335  }
 336  
 337  /**
 338   * Sets the database table prefix and the format specifiers for database table columns.
 339   *
 340   * Columns not listed here default to %s.
 341   *
 342   * @see wpdb::$field_types Since 2.8.0
 343   * @see wpdb::prepare()
 344   * @see wpdb::insert()
 345   * @see wpdb::update()
 346   * @see wpdb::set_prefix()
 347   *
 348   * @access private
 349   * @since 3.0.0
 350   */
 351  function wp_set_wpdb_vars() {
 352      global $wpdb, $table_prefix;
 353      if ( !empty( $wpdb->error ) )
 354          dead_db();
 355  
 356      $wpdb->field_types = array( 'post_author' => '%d', 'post_parent' => '%d', 'menu_order' => '%d', 'term_id' => '%d', 'term_group' => '%d', 'term_taxonomy_id' => '%d',
 357          'parent' => '%d', 'count' => '%d','object_id' => '%d', 'term_order' => '%d', 'ID' => '%d', 'comment_ID' => '%d', 'comment_post_ID' => '%d', 'comment_parent' => '%d',
 358          'user_id' => '%d', 'link_id' => '%d', 'link_owner' => '%d', 'link_rating' => '%d', 'option_id' => '%d', 'blog_id' => '%d', 'meta_id' => '%d', 'post_id' => '%d',
 359          'user_status' => '%d', 'umeta_id' => '%d', 'comment_karma' => '%d', 'comment_count' => '%d',
 360          // multisite:
 361          'active' => '%d', 'cat_id' => '%d', 'deleted' => '%d', 'lang_id' => '%d', 'mature' => '%d', 'public' => '%d', 'site_id' => '%d', 'spam' => '%d',
 362      );
 363  
 364      $prefix = $wpdb->set_prefix( $table_prefix );
 365  
 366      if ( is_wp_error( $prefix ) ) {
 367          wp_load_translations_early();
 368          wp_die( __( '<strong>ERROR</strong>: <code>$table_prefix</code> in <code>wp-config.php</code> can only contain numbers, letters, and underscores.' ) );
 369      }
 370  }
 371  
 372  /**
 373   * Access/Modify private global variable $_wp_using_ext_object_cache
 374   *
 375   * Toggle $_wp_using_ext_object_cache on and off without directly touching global
 376   *
 377   * @since 3.7.0
 378   *
 379   * @param bool $using Whether external object cache is being used
 380   * @return bool The current 'using' setting
 381   */
 382  function wp_using_ext_object_cache( $using = null ) {
 383      global $_wp_using_ext_object_cache;
 384      $current_using = $_wp_using_ext_object_cache;
 385      if ( null !== $using )
 386          $_wp_using_ext_object_cache = $using;
 387      return $current_using;
 388  }
 389  
 390  /**
 391   * Starts the WordPress object cache.
 392   *
 393   * If an object-cache.php file exists in the wp-content directory,
 394   * it uses that drop-in as an external object cache.
 395   *
 396   * @access private
 397   * @since 3.0.0
 398   */
 399  function wp_start_object_cache() {
 400      global $blog_id;
 401  
 402      $first_init = false;
 403       if ( ! function_exists( 'wp_cache_init' ) ) {
 404          if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 405              require_once ( WP_CONTENT_DIR . '/object-cache.php' );
 406              if ( function_exists( 'wp_cache_init' ) )
 407                  wp_using_ext_object_cache( true );
 408          }
 409  
 410          $first_init = true;
 411      } else if ( ! wp_using_ext_object_cache() && file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
 412          // Sometimes advanced-cache.php can load object-cache.php before it is loaded here.
 413          // This breaks the function_exists check above and can result in $_wp_using_ext_object_cache
 414          // being set incorrectly. Double check if an external cache exists.
 415          wp_using_ext_object_cache( true );
 416      }
 417  
 418      if ( ! wp_using_ext_object_cache() )
 419          require_once  ( ABSPATH . WPINC . '/cache.php' );
 420  
 421      // If cache supports reset, reset instead of init if already initialized.
 422      // Reset signals to the cache that global IDs have changed and it may need to update keys
 423      // and cleanup caches.
 424      if ( ! $first_init && function_exists( 'wp_cache_switch_to_blog' ) )
 425          wp_cache_switch_to_blog( $blog_id );
 426      elseif ( function_exists( 'wp_cache_init' ) )
 427          wp_cache_init();
 428  
 429      if ( function_exists( 'wp_cache_add_global_groups' ) ) {
 430          wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts', 'blog-id-cache' ) );
 431          wp_cache_add_non_persistent_groups( array( 'comment', 'counts', 'plugins' ) );
 432      }
 433  }
 434  
 435  /**
 436   * Redirects to the installer if WordPress is not installed.
 437   *
 438   * Dies with an error message when multisite is enabled.
 439   *
 440   * @access private
 441   * @since 3.0.0
 442   */
 443  function wp_not_installed() {
 444      if ( is_multisite() ) {
 445          if ( ! is_blog_installed() && ! defined( 'WP_INSTALLING' ) )
 446              wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) );
 447      } elseif ( ! is_blog_installed() && false === strpos( $_SERVER['PHP_SELF'], 'install.php' ) && !defined( 'WP_INSTALLING' ) ) {
 448          require ( ABSPATH . WPINC . '/kses.php' );
 449          require ( ABSPATH . WPINC . '/pluggable.php' );
 450          require ( ABSPATH . WPINC . '/formatting.php' );
 451  
 452          $link = wp_guess_url() . '/wp-admin/install.php';
 453  
 454          wp_redirect( $link );
 455          die();
 456      }
 457  }
 458  
 459  /**
 460   * Returns array of must-use plugin files to be included in global scope.
 461   *
 462   * The default directory is wp-content/mu-plugins. To change the default directory
 463   * manually, define <code>WPMU_PLUGIN_DIR</code> and <code>WPMU_PLUGIN_URL</code>
 464   * in wp-config.php.
 465   *
 466   * @access private
 467   * @since 3.0.0
 468   * @return array Files to include
 469   */
 470  function wp_get_mu_plugins() {
 471      $mu_plugins = array();
 472      if ( !is_dir( WPMU_PLUGIN_DIR ) )
 473          return $mu_plugins;
 474      if ( ! $dh = opendir( WPMU_PLUGIN_DIR ) )
 475          return $mu_plugins;
 476      while ( ( $plugin = readdir( $dh ) ) !== false ) {
 477          if ( substr( $plugin, -4 ) == '.php' )
 478              $mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
 479      }
 480      closedir( $dh );
 481      sort( $mu_plugins );
 482  
 483      return $mu_plugins;
 484  }
 485  
 486  /**
 487   * Returns array of plugin files to be included in global scope.
 488   *
 489   * The default directory is wp-content/plugins. To change the default directory
 490   * manually, define <code>WP_PLUGIN_DIR</code> and <code>WP_PLUGIN_URL</code>
 491   * in wp-config.php.
 492   *
 493   * @access private
 494   * @since 3.0.0
 495   * @return array Files to include
 496   */
 497  function wp_get_active_and_valid_plugins() {
 498      $plugins = array();
 499      $active_plugins = (array) get_option( 'active_plugins', array() );
 500  
 501      // Check for hacks file if the option is enabled
 502      if ( get_option( 'hack_file' ) && file_exists( ABSPATH . 'my-hacks.php' ) ) {
 503          _deprecated_file( 'my-hacks.php', '1.5' );
 504          array_unshift( $plugins, ABSPATH . 'my-hacks.php' );
 505      }
 506  
 507      if ( empty( $active_plugins ) || defined( 'WP_INSTALLING' ) )
 508          return $plugins;
 509  
 510      $network_plugins = is_multisite() ? wp_get_active_network_plugins() : false;
 511  
 512      foreach ( $active_plugins as $plugin ) {
 513          if ( ! validate_file( $plugin ) // $plugin must validate as file
 514              && '.php' == substr( $plugin, -4 ) // $plugin must end with '.php'
 515              && file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist
 516              // not already included as a network plugin
 517              && ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins ) )
 518              )
 519          $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
 520      }
 521      return $plugins;
 522  }
 523  
 524  /**
 525   * Sets internal encoding using mb_internal_encoding().
 526   *
 527   * In most cases the default internal encoding is latin1, which is of no use,
 528   * since we want to use the mb_ functions for utf-8 strings.
 529   *
 530   * @access private
 531   * @since 3.0.0
 532   */
 533  function wp_set_internal_encoding() {
 534      if ( function_exists( 'mb_internal_encoding' ) ) {
 535          $charset = get_option( 'blog_charset' );
 536          if ( ! $charset || ! @mb_internal_encoding( $charset ) )
 537              mb_internal_encoding( 'UTF-8' );
 538      }
 539  }
 540  
 541  /**
 542   * Add magic quotes to $_GET, $_POST, $_COOKIE, and $_SERVER.
 543   *
 544   * Also forces $_REQUEST to be $_GET + $_POST. If $_SERVER, $_COOKIE,
 545   * or $_ENV are needed, use those superglobals directly.
 546   *
 547   * @access private
 548   * @since 3.0.0
 549   */
 550  function wp_magic_quotes() {
 551      // If already slashed, strip.
 552      if ( get_magic_quotes_gpc() ) {
 553          $_GET    = stripslashes_deep( $_GET    );
 554          $_POST   = stripslashes_deep( $_POST   );
 555          $_COOKIE = stripslashes_deep( $_COOKIE );
 556      }
 557  
 558      // Escape with wpdb.
 559      $_GET    = add_magic_quotes( $_GET    );
 560      $_POST   = add_magic_quotes( $_POST   );
 561      $_COOKIE = add_magic_quotes( $_COOKIE );
 562      $_SERVER = add_magic_quotes( $_SERVER );
 563  
 564      // Force REQUEST to be GET + POST.
 565      $_REQUEST = array_merge( $_GET, $_POST );
 566  }
 567  
 568  /**
 569   * Runs just before PHP shuts down execution.
 570   *
 571   * @access private
 572   * @since 1.2.0
 573   */
 574  function shutdown_action_hook() {
 575      /**
 576       * Fires just before PHP shuts down execution.
 577       *
 578       * @since 1.2.0
 579       */
 580      do_action( 'shutdown' );
 581      wp_cache_close();
 582  }
 583  
 584  /**
 585   * Copy an object.
 586   *
 587   * @since 2.7.0
 588   * @deprecated 3.2
 589   *
 590   * @param object $object The object to clone
 591   * @return object The cloned object
 592   */
 593  
 594  function wp_clone( $object ) {
 595      // Use parens for clone to accommodate PHP 4. See #17880
 596      return clone( $object );
 597  }
 598  
 599  /**
 600   * Whether the current request is for a network or blog admin page
 601   *
 602   * Does not inform on whether the user is an admin! Use capability checks to
 603   * tell if the user should be accessing a section or not.
 604   *
 605   * @since 1.5.1
 606   *
 607   * @return bool True if inside WordPress administration pages.
 608   */
 609  function is_admin() {
 610      if ( isset( $GLOBALS['current_screen'] ) )
 611          return $GLOBALS['current_screen']->in_admin();
 612      elseif ( defined( 'WP_ADMIN' ) )
 613          return WP_ADMIN;
 614  
 615      return false;
 616  }
 617  
 618  /**
 619   * Whether the current request is for a blog admin screen /wp-admin/
 620   *
 621   * Does not inform on whether the user is a blog admin! Use capability checks to
 622   * tell if the user should be accessing a section or not.
 623   *
 624   * @since 3.1.0
 625   *
 626   * @return bool True if inside WordPress network administration pages.
 627   */
 628  function is_blog_admin() {
 629      if ( isset( $GLOBALS['current_screen'] ) )
 630          return $GLOBALS['current_screen']->in_admin( 'site' );
 631      elseif ( defined( 'WP_BLOG_ADMIN' ) )
 632          return WP_BLOG_ADMIN;
 633  
 634      return false;
 635  }
 636  
 637  /**
 638   * Whether the current request is for a network admin screen /wp-admin/network/
 639   *
 640   * Does not inform on whether the user is a network admin! Use capability checks to
 641   * tell if the user should be accessing a section or not.
 642   *
 643   * @since 3.1.0
 644   *
 645   * @return bool True if inside WordPress network administration pages.
 646   */
 647  function is_network_admin() {
 648      if ( isset( $GLOBALS['current_screen'] ) )
 649          return $GLOBALS['current_screen']->in_admin( 'network' );
 650      elseif ( defined( 'WP_NETWORK_ADMIN' ) )
 651          return WP_NETWORK_ADMIN;
 652  
 653      return false;
 654  }
 655  
 656  /**
 657   * Whether the current request is for a user admin screen /wp-admin/user/
 658   *
 659   * Does not inform on whether the user is an admin! Use capability checks to
 660   * tell if the user should be accessing a section or not.
 661   *
 662   * @since 3.1.0
 663   *
 664   * @return bool True if inside WordPress user administration pages.
 665   */
 666  function is_user_admin() {
 667      if ( isset( $GLOBALS['current_screen'] ) )
 668          return $GLOBALS['current_screen']->in_admin( 'user' );
 669      elseif ( defined( 'WP_USER_ADMIN' ) )
 670          return WP_USER_ADMIN;
 671  
 672      return false;
 673  }
 674  
 675  /**
 676   * Whether Multisite support is enabled
 677   *
 678   * @since 3.0.0
 679   *
 680   * @return bool True if multisite is enabled, false otherwise.
 681   */
 682  function is_multisite() {
 683      if ( defined( 'MULTISITE' ) )
 684          return MULTISITE;
 685  
 686      if ( defined( 'SUBDOMAIN_INSTALL' ) || defined( 'VHOST' ) || defined( 'SUNRISE' ) )
 687          return true;
 688  
 689      return false;
 690  }
 691  
 692  /**
 693   * Retrieve the current blog id
 694   *
 695   * @since 3.1.0
 696   *
 697   * @return int Blog id
 698   */
 699  function get_current_blog_id() {
 700      global $blog_id;
 701      return absint($blog_id);
 702  }
 703  
 704  /**
 705   * Attempts an early load of translations.
 706   *
 707   * Used for errors encountered during the initial loading process, before the locale has been
 708   * properly detected and loaded.
 709   *
 710   * Designed for unusual load sequences (like setup-config.php) or for when the script will then
 711   * terminate with an error, otherwise there is a risk that a file can be double-included.
 712   *
 713   * @since 3.4.0
 714   * @access private
 715   */
 716  function wp_load_translations_early() {
 717      global $text_direction, $wp_locale;
 718  
 719      static $loaded = false;
 720      if ( $loaded )
 721          return;
 722      $loaded = true;
 723  
 724      if ( function_exists( 'did_action' ) && did_action( 'init' ) )
 725          return;
 726  
 727      // We need $wp_local_package
 728      require  ABSPATH . WPINC . '/version.php';
 729  
 730      // Translation and localization
 731      require_once  ABSPATH . WPINC . '/pomo/mo.php';
 732      require_once  ABSPATH . WPINC . '/l10n.php';
 733      require_once  ABSPATH . WPINC . '/locale.php';
 734  
 735      // General libraries
 736      require_once  ABSPATH . WPINC . '/plugin.php';
 737  
 738      $locales = $locations = array();
 739  
 740      while ( true ) {
 741          if ( defined( 'WPLANG' ) ) {
 742              if ( '' == WPLANG )
 743                  break;
 744              $locales[] = WPLANG;
 745          }
 746  
 747          if ( isset( $wp_local_package ) )
 748              $locales[] = $wp_local_package;
 749  
 750          if ( ! $locales )
 751              break;
 752  
 753          if ( defined( 'WP_LANG_DIR' ) && @is_dir( WP_LANG_DIR ) )
 754              $locations[] = WP_LANG_DIR;
 755  
 756          if ( defined( 'WP_CONTENT_DIR' ) && @is_dir( WP_CONTENT_DIR . '/languages' ) )
 757              $locations[] = WP_CONTENT_DIR . '/languages';
 758  
 759          if ( @is_dir( ABSPATH . 'wp-content/languages' ) )
 760              $locations[] = ABSPATH . 'wp-content/languages';
 761  
 762          if ( @is_dir( ABSPATH . WPINC . '/languages' ) )
 763              $locations[] = ABSPATH . WPINC . '/languages';
 764  
 765          if ( ! $locations )
 766              break;
 767  
 768          $locations = array_unique( $locations );
 769  
 770          foreach ( $locales as $locale ) {
 771              foreach ( $locations as $location ) {
 772                  if ( file_exists( $location . '/' . $locale . '.mo' ) ) {
 773                      load_textdomain( 'default', $location . '/' . $locale . '.mo' );
 774                      if ( defined( 'WP_SETUP_CONFIG' ) && file_exists( $location . '/admin-' . $locale . '.mo' ) )
 775                          load_textdomain( 'default', $location . '/admin-' . $locale . '.mo' );
 776                      break 2;
 777                  }
 778              }
 779          }
 780  
 781          break;
 782      }
 783  
 784      $wp_locale = new WP_Locale();
 785  }