I’m working on a project right now that uses a PHP crontab to run a heavy script, and the problem I faced was the server kept timing out because by default PHP has a time limit for script execution.
There’s an easy way around this by adding the following line of code to the top of your php code. It simply overrides the maximum execution time for the script.
ini_set('max_execution_time', 600); //600 seconds, you can change this to what ever you like
tejas says: You can change maximum execution time to unlimited using this code:
ini_set(‘max_execution_time’, 0);
bajick says: Thank you very much!!! Keep up the good work!!!
Also note that your server admin can disable this ability, so you’ll want to check if it works before relying upon it.
I like that you are sharing every trick, every helpful code and etc.. That is good 
Thanks for it.
Your trick also possible with line at .htaccess
php_value max_execution_time 600
Designer and web developer, Co-founder and Technical Director at Harkable.com London. Previously I worked at InMobi, Spotify and MySpace. Interests include photography and making short videos. Also an avid F1 fan.
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5 discussions around Increase a PHP scripts execution time limit