php man page for ini_set

INI_SET(3)								 1								INI_SET(3)

ini_set - Sets the value of a configuration option

SYNOPSIS
       string ini_set (string  $varname, string  $newvalue)

DESCRIPTION
	Sets  the  value  of  the given configuration option. The configuration option will keep this new value during the script's execution, and
       will be restored at the script's ending.

PARAMETERS
	      o $varname
		- Not all the available options can be changed using ini_set(3). There is a list of all available options in the appendix.

	      o $newvalue
		- The new value for the option.

RETURN VALUES
	Returns the old value on success, FALSE on failure.

EXAMPLES
       Example #1

	      Setting an ini option

	      <?php
	      echo ini_get('display_errors');

	      if (!ini_get('display_errors')) {
		  ini_set('display_errors', '1');
	      }

	      echo ini_get('display_errors');
	      ?>

SEE ALSO
       get_cfg_var(3), ini_get(3), ini_get_all(3), ini_restore(3), How to change configuration settings.

PHP Documentation Group 														INI_SET(3)