**一.Get\_defined\_functions改進禁用函數** #php.ini:disable\_functions=substr 1.代碼實例 ~~~ function Foo(string $name,int $age){ return "$name,$age"; } function substr(){ echo 23; } $ref=get_defined_functions(); echo "<pre>"; print_r($ref); echo "</pre>"; ~~~ 2.低版本 ~~~ Fatal error: Cannot redeclare substr() ~~~ 3.新版本 ~~~ [user] => Array ( [0] => foo [1] => substr ) ~~~