PHP Automatic Execution program

/****config.php***/<?PHPreturn1;//change to 0 when you need to stop?>/******************/Ignore_user_abort();//turn off the browser and the PHP script will continue to execute.Set_time_limit(0);//set_time_limit (0) allows the program to be implemented without restrictions$interval=60*30;//running every half hour Do{    $run=include' Config.php '; if(!$run) die(' Process abort '); //Here is the code you want to execute    $file= "Cron.txt"; $content= "This is the first".$i." Times to execute! \ r \ n "; $fp=fopen($file, "A +"); fwrite($fp,$content); fclose($fp); $i++; Sleep($interval);//running every half hour     } while(true);