Ds\Map::hasKey

(PECL ds >= 1.0.0)

Ds\Map::hasKey — Determines whether the map contains a given key

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

Determines whether the map contains a given key.

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key

The key to look for.

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Returns TRUE if the key could found, FALSE otherwise.

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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
?>

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bool(true)
bool(false)