php 数组

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;
?> 

 

转载于:https://www.cnblogs.com/jly553/p/4233120.html