**一.ReflectionFunction::isDisabled弃用** 1.禁用函数 #php.ini ~~~ disable_functions=substr ~~~ 1.低版本 #Method ReflectionFunction::isDisabled() is deprecated ~~~ $ref=new ReflectionFunction('substr'); var_dump($ref->isDisabled()) ~~~ 2.新版本 #true ~~~ $ref=new ReflectionFunction('substr'); var_dump($ref->isDisabled()) ~~~