仅在整数时获取查询字符串

Question

Trying to get a query string into a variable but only if it's an integer.

Code is probably a bit more complicated than it should be but this is where I'm up to-

  //get page number. default is 1. check is not empty and is a number      
     if (empty($_GET['pag'])) {$page = 1;}
     else if (is_int($_GET['pag'])){$page = $_GET['pag'];}
     else {$page = 1;}

Where am I going wrong?

Answer 1

You probably want is_numeric() instead - is_int() doesn't test to see if a string is a numeric string.

if (empty($_GET['pag'])) {$page = 1;}
else if (is_numeric($_GET['pag'])){$page = (int) $_GET['pag'];}
else {$page = 1;}