(PECL ds >= 1.0.0)
Ds\Map::hasKey — Determines whether the map contains a given key
public Ds\Map::hasKey ( mixed $key ) : bool
Determines whether the map contains a given key.
key
The key to look for.
Returns true if the key could found, false otherwise.
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)
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/ds-map.haskey.php