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   1  <?php
   2  
   3  function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
   4      $crons = _get_cron_array();
   5      $key = md5(serialize($args));
   6      $crons[$timestamp][$hook][$key] = array( 'schedule' => false, 'args' => $args );
   7      uksort( $crons, "strnatcasecmp" );
   8      _set_cron_array( $crons );
   9  }
  10  
  11  function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
  12      $crons = _get_cron_array();
  13      $schedules = wp_get_schedules();
  14      $key = md5(serialize($args));
  15      if ( !isset( $schedules[$recurrence] ) )
  16          return false;
  17      $crons[$timestamp][$hook][$key] = array( 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] );
  18      uksort( $crons, "strnatcasecmp" );
  19      _set_cron_array( $crons );
  20  }
  21  
  22  function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array()) {
  23      $crons = _get_cron_array();
  24      $schedules = wp_get_schedules();
  25      $key = md5(serialize($args));
  26      $interval = 0;
  27  
  28      // First we try to get it from the schedule
  29      if ( 0 == $interval )
  30          $interval = $schedules[$recurrence]['interval'];
  31      // Now we try to get it from the saved interval in case the schedule disappears
  32      if ( 0 == $interval )
  33          $interval = $crons[$timestamp][$hook][$key]['interval'];
  34      // Now we assume something is wrong and fail to schedule
  35      if ( 0 == $interval )
  36          return false;
  37  
  38      while ( $timestamp < time() + 1 )
  39          $timestamp += $interval;
  40  
  41      wp_schedule_event( $timestamp, $recurrence, $hook, $args );
  42  }
  43  
  44  function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
  45      $crons = _get_cron_array();
  46      $key = md5(serialize($args));
  47      unset( $crons[$timestamp][$hook][$key] );
  48      if ( empty($crons[$timestamp][$hook]) )
  49          unset( $crons[$timestamp][$hook] );
  50      if ( empty($crons[$timestamp]) )
  51          unset( $crons[$timestamp] );
  52      _set_cron_array( $crons );
  53  }
  54  
  55  function wp_clear_scheduled_hook( $hook ) {
  56      $args = array_slice( func_get_args(), 1 );
  57  
  58      while ( $timestamp = wp_next_scheduled( $hook, $args ) )
  59          wp_unschedule_event( $timestamp, $hook, $args );
  60  }
  61  
  62  function wp_next_scheduled( $hook, $args = array() ) {
  63      $crons = _get_cron_array();
  64      $key = md5(serialize($args));
  65      if ( empty($crons) )
  66          return false;
  67      foreach ( $crons as $timestamp => $cron ) {
  68          if ( isset( $cron[$hook][$key] ) )
  69              return $timestamp;
  70      }
  71      return false;
  72  }
  73  
  74  function spawn_cron() {
  75      $crons = _get_cron_array();
  76  
  77      if ( !is_array($crons) )
  78          return;
  79  
  80      $keys = array_keys( $crons );
  81      if ( array_shift( $keys ) > time() )
  82          return;
  83  
  84      $cron_url = get_option( 'siteurl' ) . '/wp-cron.php';
  85      $parts = parse_url( $cron_url );
  86  
  87      if ($parts['scheme'] == 'https') {
  88          // support for SSL was added in 4.3.0
  89          if (version_compare(phpversion(), '4.3.0', '>=') && function_exists('openssl_open')) {
  90              $port = isset($parts['port']) ? $parts['port'] : 443;
  91              $argyle = @fsockopen('ssl://' . $parts['host'], $port, $errno, $errstr, 0.01);
  92          } else {
  93              return false;
  94          }
  95      } else {
  96          $port = isset($parts['port']) ? $parts['port'] : 80;
  97          $argyle = @ fsockopen( $parts['host'], $port, $errno, $errstr, 0.01 );
  98      }
  99  
 100      if ( $argyle )
 101          fputs( $argyle,
 102                "GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
 103              . "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"
 104          );
 105  }
 106  
 107  function wp_cron() {
 108      // Prevent infinite loops caused by lack of wp-cron.php
 109      if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false )
 110          return;
 111  
 112      $crons = _get_cron_array();
 113  
 114      if ( !is_array($crons) )
 115          return;
 116  
 117      $keys = array_keys( $crons );
 118      if ( isset($keys[0]) && $keys[0] > time() )
 119          return;
 120  
 121      $schedules = wp_get_schedules();
 122      foreach ( $crons as $timestamp => $cronhooks ) {
 123          if ( $timestamp > time() ) break;
 124          foreach ( $cronhooks as $hook => $args ) {
 125              if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
 126                  continue;
 127              spawn_cron();
 128              break 2;
 129          }
 130      }
 131  }
 132  
 133  function wp_get_schedules() {
 134      $schedules = array(
 135          'hourly' => array( 'interval' => 3600, 'display' => __('Once Hourly') ),
 136          'daily' => array( 'interval' => 86400, 'display' => __('Once Daily') ),
 137      );
 138      return array_merge( apply_filters( 'cron_schedules', array() ), $schedules );
 139  }
 140  
 141  function wp_get_schedule($hook, $args = array()) {
 142      $crons = _get_cron_array();
 143      $key = md5(serialize($args));
 144      if ( empty($crons) )
 145          return false;
 146      foreach ( $crons as $timestamp => $cron ) {
 147          if ( isset( $cron[$hook][$key] ) )
 148              return $cron[$hook][$key]['schedule'];
 149      }
 150      return false;
 151  }
 152  
 153  //
 154  // Private functions
 155  //
 156  
 157  function _get_cron_array()  {
 158      $cron = get_option('cron');
 159      if ( ! is_array($cron) )
 160          return false;
 161  
 162      if ( !isset($cron['version']) )
 163          $cron = _upgrade_cron_array($cron);
 164  
 165      unset($cron['version']);
 166  
 167      return $cron;
 168  }
 169  
 170  function _set_cron_array($cron) {
 171      $cron['version'] = 2;
 172      update_option( 'cron', $cron );
 173  }
 174  
 175  function _upgrade_cron_array($cron) {
 176      if ( isset($cron['version']) && 2 == $cron['version'])
 177          return $cron;
 178  
 179      $new_cron = array();
 180  
 181      foreach ($cron as $timestamp => $hooks) {
 182          foreach ( $hooks as $hook => $args ) {
 183              $key = md5(serialize($args['args']));
 184              $new_cron[$timestamp][$hook][$key] = $args;
 185          }
 186      }
 187  
 188      $new_cron['version'] = 2;
 189      update_option( 'cron', $new_cron );
 190      return $new_cron;
 191  }
 192  
 193  ?>