简单教程
提交运行
代码编辑器：
<?php function myfunction($a,$b) { if ($a===$b) { return 0; } return ($a>$b)?1:-1; } $a1 = array("a"=>"red","b"=>"green","c"=>"blue","yellow"); $a2 = array("A"=>"red","b"=>"GREEN","yellow","black"); $a3 = array("a"=>"green","b"=>"red","yellow","black"); $result = array_udiff($a1,$a2,$a3,"myfunction"); print_r($result);
运行结果：