Does strtoupper work with letters and numbers
I have a short line of code that I would like to make uppercase.

    $box = mysql_real_escape_string(strtoupper($_POST['box']));

For some reason, it is not making it uppercase. Could it be because the post is a mixture of letters and numbers? ie; ee588. Thanks
Does strtoupper work with letters and numbers
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I have a short line of code that I would like to make uppercase.

    $box = mysql_real_escape_string(strtoupper($_POST['box']));

For some reason, it is not making it uppercase. Could it be because the post is a mixture of letters and numbers? ie; ee588. Thanks