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)

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    User Contributed Notes 1 note

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    goran at extensionsforjoomla dot com
    18 years ago
    In versions prior to PHP 5.2.2 offsetExists() would return false if index value is null.<?php// running PHP 5.2.1$params = new ArrayObject(array('INT'=>null, 'STR'=> null, 'BOOL'=>null, 'LOB'=>null));$test = $params->offsetExists('INT');var_dump($test);// result would be bool(false)// running PHP 5.2.2$params = new ArrayObject(array('INT'=>null, 'STR'=> null, 'BOOL'=>null, 'LOB'=>null));$test = $params->offsetExists('INT');var_dump($test);// result would be bool(true)?>Both tests where made on Windows platform.
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