keyExists()

The keyExists() method tests whether the requested index exists.

Example.php

<?php use kim\present\utils\arrays\ArrayUtils;

$arrayUtils = ArrayUtils::from(["Apple", "Banana", "Carrot", "FAV" => "Becon"]);

//Check array has each indexs
$arrayUtils->keyExists(1);      // expected output: true
$arrayUtils->keyExists(2);      // expected output: true
$arrayUtils->keyExists(3);      // expected output: false
$arrayUtils->keyExists("HATE"); // expected output: false
$arrayUtils->keyExists("FAV");  // expected output: true

Syntax

$arrayUtils->keyExists(int|string $key) : bool;

Parameter

• $key

  The index being checked.

Return value

• Boolean the whether the requested index exists

Prefixing

ArrayUtils::keyExistsFrom(iterable $from, int|string $key) : bool;

References

https://www.php.net/manual/en/function.issetwww.php.net

https://www.php.net/manual/en/function.array-key-existswww.php.net