Increase Maximum Execution Time for PHP Scripts

Some times we would need out scripts to excutes longer than the default "30 seconds" limit of execution.
In such cases use the following in your file,
Execution Time Limit:
In your file or php.ini file :-

ini_set('max_execution_time', 300);

In .htaccess file :-

<IfModule mod_php5.c>
php_value max_execution_time 259200
</IfModule>