Returns whether the requested index exists
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    ArrayObject::offsetExists

    (PHP 5, PHP 7, PHP 8)

    ArrayObject::offsetExists — Returns whether the requested index exists

    Description

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

    Parameters

    key

    The index being checked.

    Return Values

    true if the requested index exists, otherwise false

    Examples

    Example #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'));?>

    The above example will output:

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