//如果两个参数之间有区别.array_diff会返回第二个参数的差值 $oldData = array(0=>‘德国‘,1=>‘deguo‘); $newData = array(0=>‘德国aaa‘,1=>‘deguo‘); $diff = array_diff($oldData, $newData); print_r($diff); // ‘德国aaa‘
array_diff的参数前后循序的区别
原文：http://www.cnblogs.com/meibao/p/5141673.html
