查找数组某个指定键值，必须用遍历吗？该如何解决

查找数组某个指定键值，必须用遍历吗？
数组格式如下：

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Array(    [0] => Array        (            [0] => ID            [1] => Nickname        )    [1] => Array        (            [0] => 29            [1] => Test1        )    [2] => Array        (            [0] => 654            [1] => Xxx1        ))

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PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->foreach($array as $value){    if($value[0]==29)    {        //判断条件成立，进行相关操作        }}

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PHP code

$array = array(0 =&gt; array('id', 'name'), array('29', 'test'), array('65', '29'));array_walk($array, $theValue = 'checkvalue', 29);if ($theValue == true) {    echo 'ok';}function checkvalue($value, $key, $number){    if ($value[0] == $number) {        //something        return true;    }}<div class="clear"></div>

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