简单教程
提交运行
代码编辑器：
<?php $a1 = array("a"=>"red","b"=>"green","c"=>"blue"); $a2 = array("c"=>"yellow","d"=>"black","e"=>"brown"); $a3 = array("f"=>"green","c"=>"purple","g"=>"red"); $result=array_intersect_key($a1,$a2,$a3); print_r($result);
运行结果：