5.5.15

ArrayObject::offsetExists

(PHP 5 >= 5.0.0)

ArrayObject::offsetExistsReturns whether the requested index exists

Description

public bool ArrayObject::offsetExists ( mixed $index )

Parameters

index

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
7 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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