简单教程
提交运行
代码编辑器：
<?php $a1 = array("a"=>array("red"),"b"=>array("green","blue")); $a2 = array("a"=>array("yellow"),"b"=>array("black")); $a3 = array("a"=>array("orange"),"b"=>array("burgundy")); print_r(array_replace_recursive($a1,$a2,$a3));
运行结果：