Type of $_GET variable

问题

I have this rewriterule in .htaccess file

RewriteRule ^(.+)$ index.php?url=$1

Then, when I check type of $_GET['url'], is always a string.

I interested to know whether or not it's possible, to write in the browser's address bar some magic symbols (or something like this) and obtain in $_GET['url'] an other type (not string)?

Or will the type of $_GET always be string?

回答1:

If you do this:

 index.php?url=asd&url[]=asd //asd&url[]=asd being the dynamic part

Then $_GET['url'] will be an array.

回答2:

Whatever you take from $_GET will always be a string.

回答3:

$_GET parameters will always be strings.

But you could check if your variable is a number, and then use a cast:

if (is_numeric($_GET['url'])) {
  $url = (int) $_GET['url'];
}

http://php.net/manual/en/function.is-numeric.php

http://php.net/manual/en/language.types.type-juggling.php

来源：https://stackoverflow.com/questions/13388933/type-of-get-variable