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ArrayObject::offsetExists

(PHP 5, PHP 7, PHP 8)

ArrayObject::offsetExists — Returns whether the requested index exists

Опис

public ArrayObject::offsetExists(mixed $key): bool

Параметри

key

The index being checked.

Значення, що повертаються

true if the requested index exists, otherwise false

Приклади

Приклад #1 ArrayObject::offsetExists() example

<?php
$arrayobj = new ArrayObject(array('zero', 'one', 'example'=>'e.g.'));
var_dump($arrayobj->offsetExists(1));
var_dump($arrayobj->offsetExists('example'));
var_dump($arrayobj->offsetExists('notfound'));
?>

Поданий вище приклад виведе:

bool(true)
bool(true)
bool(false)