Cronjob或批处理php文件

i've 30 or more php script thats must be executed daily. But i don't want to create cronjobs for every php file. So, i've looked for a php script that gets every file in directory and includes in a page:

foreach (glob("*.php") as $filename){ if ($filename!='work.php') } {
    include($filename);
}

But when i try to include all files in same page, my page is getting slow and i tought it'll exhaust the server. Is there any way to create cronjob for executing all php files in a directory or is there any way to execute all files in one php file one by one? So, i hope i could explain myself, any ideas?