- var_dump: documentation ( source)
- function_exists: documentation ( source)
- ini_get: documentation ( source)
<?php
$overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'mbstring.func_overload' ) & 2 );
var_dump($overloaded);
$overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'dont_exist' ) & 2 );
var_dump($overloaded);