如何从 url 中获取多个具有相同名称的值？

Question

I have created a form using checkboxes with the method set to GET.

The results are example.com/careers/?career_type=val1&career_type=val2

<?= $_GET['career_type']; ?>

This only displays val2.

Is it possible to display both values?

Answer 1

While it's perfectly valid to have multiple parameters with the same name, PHP doesn't handle it very well. You have two options.

1. Change the URL to use an array eg example.com/careers/?career_type[]=va1&career_type[]=val2 . Then $_GET['career_type'] will be returned as an array containing val1 and val2. If you're using a form to generate this URL, you can simply name your fields name="career_type[]"

2. If that's not possible, you can manually parse the query string. This will have the same effect:

    $query = explode('&', $_SERVER['QUERY_STRING']);
    $params = [];
    foreach ($query as $param) {
        [$name, $value] = explode('=', $param, 2);
        $params[urldecode($name)][] = urldecode($value);
    }

    var_dump($params['career_type']);