Map
PHP Manual

Ds\Map::hasKey

Determines whether the map contains a given key.

Description

public bool Ds\Map::hasKey ( mixed $key )

Determines whether the map contains a given key.

Parameters

key

The key to look for.

Return Values

Returns TRUE if the key could found, FALSE otherwise.

Examples

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
?>

The above example will output something similar to:

bool(true)
bool(false)