array_key_exists

array_key_exists

(PHP 4 >= 4.0.7, PHP 5, PHP 7)

array_key_existsChecks if the given key or index exists in the array

Description

bool array_key_exists ( mixed $key , array $array )

array_key_exists() returns TRUE if the given key is set in the array. key can be any value possible for an array index.

Parameters

key 登录查看完整内容