PHP 5.0 also introduces E_STRICT, which is primarily used to indicate functionality that has been deprecated in PHP5.

PHP 5.0 Error Reporting
# Inside PHP.ini
error_reporting = E_ALL | E_STRICT

# Inside httpd.conf or .htacess
php_value error_reporting 4095

# Inside a script
<?php
ini_set("error_reporting", E_ALL | E_STRICT);
/* or */
error_reporting(E_ALL | E_STRICT);
?>