Check if function called by cron job

3 comments

1. WordPress has a constant DOING_CRON that helps us know we’re doing the cron jobs or not. It’s defined in wp-cron.php file.

   So, you can check this constant in your code:

   if ( defined( 'DOING_CRON' ) )
   {
       // Do something
   }
   

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2. Just take a look at the »Cron API inspector«, that I wrote for question #18017. The plugin builds a table that shows on the shutdown-hook/the end of the page.

   It uses the _get_cron_array() function to retrieve all registered & scheduled actions. Another useful function is wp_get_schedules(). The third way is calling the underlying data for _get_cron_array() directly, by calling get_option( 'cron' ); – it’s still better to use the default API functions from WP core.

   If you want to know if you’re currently inside a Cron Job, then you can check defined( 'DOING_CRON' ) AND DOING_CRON.

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3. I’m not studies development (I’m just an enthusiast) but I think you may add a add_action to the event

   It’s just a resume…

   //to the event
   if(your_condition)
   {
       add_action('original_event_to_hook', 'your_scheduled');
   }
   
   function your_scheduled()
   {
       //create a param here
       //And shedule your function with arg
       wp_schedule_event(time(), 'hourly', 'your_function', array('param_1' => value));
   }
   
   function your_function($args){
   
      $verification = $args['param_1'];
      if($verification)
      {
         //OK
         //Eventually delete this schedule with this specific arg
      }
   }
   

   To retrieve a list of your cron “your_function” where have this arg

        //Get a filtered list of cron hooks 
           function kw_filter_crons_hooks($hooks = false, $args = false)
           {
               $crons = get_option('cron');
   
               if (!$crons)
               {
                   $crons[0] = NULL;
               }
   
               $filter = array();
               $cronlist = array();
               $schedule = array();
   
               foreach($crons as $timestamp => $cron)
               {
                   //@param $hooks = string 'schedule'
                   //@param $args = false
                   //Return an array of cron task sheduled
                   $schedule[] = $cron;
   
                   if(!$schedule && $hooks == 'schedule' && $args == false)
                   {
                       $schedule[0] = NULL;
                   }
   
                   foreach($hooks as $hook)
                   {
                       if(isset($cron[$hook]))
                       {
                           //@param $hooks = array($hook);
                           //@param $args = false
                           //Return an array of cron task sheduled
                           $cronlist[] = $cron;
   
                           if(!$cronlist && is_array($hooks) && $args == false)
                           {
                               $cronlist[0] = NULL;
                           }
   
                           if(!empty($args))
                           {
                               foreach($cronlist as $key => $value)
                               {
                                   foreach($value as $k => $v)
                                   {
                                       foreach($v as $x => $y)
                                       {
                                           foreach($args as $arg => $val)
                                           {
                                               if ($y['args'][$arg] == $val)
                                               {
                                                   //@param $hooks = array($hook);
                                                   //@param $args = array($arg);
                                                   //Return an array of cron task specified filtered by arg
                                                   $filter[$x] = $y;
                                                   if(!$filter && is_array($hooks) && is_array($args))
                                                   {
                                                       $filter[0] = NULL;
                                                   }
                                               }
                                           }
                                       }
                                   }
                               }
                           }
                       }
                   }
               }
   
   
               if(is_array($hooks) && $args === false && $cronlist)
               {
                   return $cronlist;
               }
               else if(is_array($hooks) && is_array($args) && $filter)
               {
                   return $filter;
               }
               else if($hooks === 'schedule' && $args === false && $schedule)
               {
                   return $schedule;
               }
               else if($hooks === false && $args === false && $crons)
               {
                   return $crons;
               }
               else
               {
                   return false;
               }
           }
   
   //Usage
       $cron_filtered = kw_filter_crons_hooks(array('your_function'), array('param_1' => value));
       var_dump($cron_filtered);
   

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