Check if “exec” is disabled [duplicate]

Answer 1

The following function is more robust. It deals with the disabled_functions value having 0 or more spaces between function names, checks the suhosin patch's blacklist setting, covers safe_mode, and stores the answer for future reference.

function is_exec_available() {
    static $available;

    if (!isset($available)) {
        $available = true;
        if (ini_get('safe_mode')) {
            $available = false;
        } else {
            $d = ini_get('disable_functions');
            $s = ini_get('suhosin.executor.func.blacklist');
            if ("$d$s") {
                $array = preg_split('/,\s*/', "$d,$s");
                if (in_array('exec', $array)) {
                    $available = false;
                }
            }
        }
    }

    return $available;
}