WordPress 4.6.3-scripts

[autoinstalls/wordpress.git] / wp-cron.php

diff --git a/wp-cron.php b/wp-cron.php
index efd66c68b67ba590a27112ce9c5da2dac15ff89d..15c6676b77976af549bfa470a5fd0a42fd43e937 100644 (file)
--- a/wp-cron.php
+++ b/wp-cron.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * WordPress Cron Implementation for hosts, which do not offer CRON or for which
- * the user has not setup a CRON job pointing to this file.
+ * the user has not set up a CRON job pointing to this file.
  *
  * The HTTP request to this file will not slow down the visitor who happens to
  * visit when the cron job is needed to run.
@@ -11,43 +11,119 @@
 
 ignore_user_abort(true);
 
+if ( !empty($_POST) || defined('DOING_AJAX') || defined('DOING_CRON') )
+       die();
+
 /**
  * Tell WordPress we are doing the CRON task.
  *
  * @var bool
  */
 define('DOING_CRON', true);
-/** Setup WordPress environment */
-require_once('./wp-load.php');
 
-if ( $_GET['check'] != wp_hash('187425') )
-       exit;
+if ( !defined('ABSPATH') ) {
+       /** Set up WordPress environment */
+       require_once( dirname( __FILE__ ) . '/wp-load.php' );
+}
+
+/**
+ * Retrieves the cron lock.
+ *
+ * Returns the uncached `doing_cron` transient.
+ *
+ * @ignore
+ * @since 3.3.0
+ *
+ * @return string|false Value of the `doing_cron` transient, 0|false otherwise.
+ */
+function _get_cron_lock() {
+       global $wpdb;
+
+       $value = 0;
+       if ( wp_using_ext_object_cache() ) {
+               /*
+                * Skip local cache and force re-fetch of doing_cron transient
+                * in case another process updated the cache.
+                */
+               $value = wp_cache_get( 'doing_cron', 'transient', true );
+       } else {
+               $row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", '_transient_doing_cron' ) );
+               if ( is_object( $row ) )
+                       $value = $row->option_value;
+       }
+
+       return $value;
+}
+
+if ( false === $crons = _get_cron_array() )
+       die();
 
-if ( get_option('doing_cron') > time() )
-       exit;
+$keys = array_keys( $crons );
+$gmt_time = microtime( true );
 
-update_option('doing_cron', time() + 30);
+if ( isset($keys[0]) && $keys[0] > $gmt_time )
+       die();
 
-$crons = _get_cron_array();
-$keys = array_keys($crons);
-if (!is_array($crons) || $keys[0] > time())
+
+// The cron lock: a unix timestamp from when the cron was spawned.
+$doing_cron_transient = get_transient( 'doing_cron' );
+
+// Use global $doing_wp_cron lock otherwise use the GET lock. If no lock, trying grabbing a new lock.
+if ( empty( $doing_wp_cron ) ) {
+       if ( empty( $_GET[ 'doing_wp_cron' ] ) ) {
+               // Called from external script/job. Try setting a lock.
+               if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $gmt_time ) )
+                       return;
+               $doing_cron_transient = $doing_wp_cron = sprintf( '%.22F', microtime( true ) );
+               set_transient( 'doing_cron', $doing_wp_cron );
+       } else {
+               $doing_wp_cron = $_GET[ 'doing_wp_cron' ];
+       }
+}
+
+/*
+ * The cron lock (a unix timestamp set when the cron was spawned),
+ * must match $doing_wp_cron (the "key").
+ */
+if ( $doing_cron_transient != $doing_wp_cron )
        return;
 
-foreach ($crons as $timestamp => $cronhooks) {
-       if ($timestamp > time()) break;
-       foreach ($cronhooks as $hook => $keys) {
-               foreach ($keys as $key => $args) {
-                       $schedule = $args['schedule'];
-                       if ($schedule != false) {
-                               $new_args = array($timestamp, $schedule, $hook, $args['args']);
+foreach ( $crons as $timestamp => $cronhooks ) {
+       if ( $timestamp > $gmt_time )
+               break;
+
+       foreach ( $cronhooks as $hook => $keys ) {
+
+               foreach ( $keys as $k => $v ) {
+
+                       $schedule = $v['schedule'];
+
+                       if ( $schedule != false ) {
+                               $new_args = array($timestamp, $schedule, $hook, $v['args']);
                                call_user_func_array('wp_reschedule_event', $new_args);
                        }
-                       wp_unschedule_event($timestamp, $hook, $args['args']);
-                       do_action_ref_array($hook, $args['args']);
+
+                       wp_unschedule_event( $timestamp, $hook, $v['args'] );
+
+                       /**
+                        * Fires scheduled events.
+                        *
+                        * @ignore
+                        * @since 2.1.0
+                        *
+                        * @param string $hook Name of the hook that was scheduled to be fired.
+                        * @param array  $args The arguments to be passed to the hook.
+                        */
+                       do_action_ref_array( $hook, $v['args'] );
+
+                       // If the hook ran too long and another cron process stole the lock, quit.
+                       if ( _get_cron_lock() != $doing_wp_cron )
+                               return;
                }
        }
 }
 
-update_option('doing_cron', 0);
+if ( _get_cron_lock() == $doing_wp_cron )
+       delete_transient( 'doing_cron' );
 
-?>
\ No newline at end of file
+die();