<?php
$arr=array(
array("num"=>100,"name"=>"Liuxy","score"=>"hello")
);
foreach ($arr as $key =>&$value) {
if($value[‘name‘]=="Liuxy"){
$value[‘name‘]=$value[‘score‘];
}
}
print_r($arr);
?>
原文：http://www.cnblogs.com/25miao/p/7160393.html