(PHP 5 >= 5.0.0)
ArrayObject::offsetExists — Returns whether the requested index exists
The index being checked.
TRUE if the requested index exists, otherwise FALSE
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)