Ds\Map::hasKey
(PECL ds >= 1.0.0)
Ds\Map::hasKey — Determines whether the map contains a given key
参数
-
key
-
The key to look for.
返回值
Returns TRUE
if the key could found, FALSE
otherwise.
范例
Example #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
?>
以上例程的输出类似于:
bool(true) bool(false)