PHP中获取GET的值?

Question

PHP中获取GET的值

Answer 1

playall.php?id=1&id=2&id=3&a=ok
换成：playall.php?id1=1&id2=2&id3=3&a=ok
参数名不能有重名
$ID = $_GET["id1"] + "," + $_GET["id2"] + "," + $_GET["id3"];

Answer 2

加号是js用的啦~~应该这样组合，用.
$ID = $_GET["id1"] . "," . $_GET["id2"] . "," . $_GET["id3"];
其实很奇怪既然要那种形式为什么不直接playall.php?id=1,2,3&&a=ok
这样传值~~