1.php array根据value获取key
array_search()
<?php $array = array(0 => ‘blue‘, 1 => ‘red‘, 2 => ‘green‘, 3 => ‘red‘); $key = array_search(‘green‘, $array); // $key = 2; ?>
php 数组
原文：http://www.cnblogs.com/jly553/p/4233120.html
