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# ArrayIterator::key

(no version information, might be only in CVS)

ArrayIterator::key -- Return current array key

## Description

mixed ArrayIterator::key ( void )

This function returns the current array key

示範 1.ArrayIterator::key() example
`<?php $array = array('key' => 'value'); $arrayobject = new ArrayObject($array); $iterator = $arrayobject->getIterator(); echo $iterator->key(); //key ?>`

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