Ds\Map::hasKey
(PECL ds >= 1.0.0)
Ds\Map::hasKey — Determines whether the map contains a given key
參數
-
key
-
The key to look for.
返回值
Returns true
if the key could found, false
otherwise.
範例
示例 #1 Ds\Map::hasKey() example
<?php
$map = new \Ds\Map(["a" => 1, "b" => 2, "c" => 3]);
var_dump($map->hasKey("a")); // true
var_dump($map->hasKey("e")); // false
?>
以上例程的輸出類似於:
bool(true) bool(false)