I have a URL parameter that contains a category ID and I want to treat it as an array like this:
http://example.com?cat[]=3,9,13
In PHP I use this to get an array from a URL parameter:
$catIDs = $_GET['cat'];
When I do echo gettype($catIDs); it shows that it is actually treated as an array, but when I do print_r($catIDs); I Get the following results:
Array ([0] => 3,9,13)
But I expected this:
Array ([0] => 3, [1] => 9, [2] => 13)
What am I missing here? Thanks!
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The error is not on the server/PHP side, but on the client/requester side. The given URL gives you an array containing one element, which is a comma-separated string:
Yield:
To specify an array via a URL parameter, you need to repeat the parameter name for each item:
Yield:
Alternatively, you can specify a comma-separated parameter:
Then split it:
$cat = explode(',', $_GET['cat']);