<?php
$class1 = array("西門"=>"55","滅絕"=>"44","無忌"=>"22");
$class2 = array("西門"=>"54","滅絕"=>"44","無忌"=>"25");
print_r(array_diff($class1,$class2 )); //返回兩個(gè)數(shù)組中不一樣的元素
?>

<?php
$per1=array("a"=>"滅絕師太","b"=>"歐陽克","c"=>"西門大官人","d"=>"韋小寶");
$per2=array("e"=>"Peter","f"=>"慕容復(fù)","g"=>"陳近南");
$per3=array("a"=>"滅絕師太","b"=>"歐陽克","h"=>"王重陽");

$result=array_diff($per1,$per2,$per3);
print_r($result);
?>