Ticket #18997: 18997.patch

src/wp-includes/cron.php

@@ -183 +183 @@
         }
 }
 
+/** 
+* Unschedule all previously scheduled cron jobs for a hook. 
+*
+* Can be useful for plugins when deactivating to clean up the cron queue 
+* 
+* The $hook parameter is required, so that the events can be 
+* identified. 
+* 
+* @since x.x
+* 
+* @param string $hook Action hook, the execution of which will be unscheduled. 
+*/ 
+function wp_unschedule_hook( $hook ) { 
+        
+        $crons = _get_cron_array(); 
+
+        foreach( $crons as $timestamp => $args ) { 
+
+                unset( $crons[$timestamp][$hook] );
+
+                if ( empty( $crons[$timestamp] ) ) {
+                        unset( $crons[$timestamp] );
+                }
+
+        }
+
+        _set_cron_array( $crons ); 
+
+}
+
 /**
  * Retrieve the next timestamp for a cron event.
  *