How we can increase the execution time of a PHP script ?

I have given you some function using them you can increase the execution time of a PHP script.Default time for execution of a PHP script is 30 seconds.These are -

1.set_time_limit()//change execution time temporarily.

2.ini_set()//change execution time temporarily.

3. By modifying `max_execution_time' value in PHPconfiguration(php.ini) file.//change execution time permanent.