当问号出现时，parse_str不起作用？

Question

why I get error when I pass the string with something like 'form.php?', for instance,

parse_str('form.php?category=contacts');
echo $category;

I get this,

Notice: Undefined variable: category in C:\wamp\www\1hundred_2011_MVC\applications\CMS\category_manage.php on line xx

but,

parse_str('category=contacts');
echo $category;

I get what I want,

contacts

how can I fix it? I have to pass something like 'xxx.php?category=contacts' to get 'contacts' or something in the variable.

thanks.

Answer 1

The function parse_str only parses the query string, not the entire URL. Try using parse_url with the component set to PHP_URL_QUERY to extract the query string first, then use parse_str on that.

$url_query = parse_url('form.php?category=contacts', PHP_URL_QUERY);
parse_str($url_query, $output);
echo $output['category'];

Result:

contacts

See it at ideone.