PHP: Case-insensitive parameters

php variables performance query-string case-insensitive
VeeBee picture VeeBee · Nov 18, 2010 · Viewed 12.4k times · Source

How do I accept passed GET or POST values case insensitively?

Like sample.php?OrderBy=asc will still be the same as sample.php?orderby=asc or sample.php?ORDERBY=asc

Is there a means of achieving the above efficiently?

Answer

BoltClock picture BoltClock · Nov 18, 2010

You could use array_change_key_case() to create a copy of $_GET with either all uppercase or all lowercase keys.

$_GET_lower = array_change_key_case($_GET, CASE_LOWER);
$orderby = isset($_GET_lower['orderby']) ? $_GET_lower['orderby'] : 'asc';
echo $orderby;

(I say "create a copy" simply because I don't like polluting the original superglobals, but it's your choice to overwrite them if you wish.)

For that matter, it'd still be better if you just stick to case-sensitive matching since it might be easier on both search engine and human eyes, as well as easier on your code... EDIT: OK, based on your comment I can see why you'd want to do something like this.

Related questions

"Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset" using PHP

I'm running a PHP script and continue to receive errors like: Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10 Notice: Undefined index: my_index C:\wamp\www\mypath\index.php on line 11 Line 10 …

Read More
How to add elements to an empty array in PHP?

If I define an array in PHP such as (I don't define its size): $cart = array(); Do I simply add elements to it using the following? $cart[] = 13; $cart[] = "foo"; $cart[] = obj; Don't arrays in PHP have an add method, for …

Read More
PHP Pass variable to next page

It seems pretty simple but I can't find a good way to do it. Say in the first page I create a variable $myVariable = "Some text"; And the form's action for that page is "Page2.php". So in Page2.php, …

Read More