I found a user reply below about the strcmp() function in PHP, and I am baffled by why this would be. Anyone understand the reason why mixing quoting styles on an HTML form would fail the strcom comparison?

Source: http://www.php.net/manual/en/function.strcmp.php#50151

When using strcmp to compare results received from a form, keep in mind that the way you decide to encapsulate the value of the form will have an effect on your strcmp() results.

Example:

<input type="post" name="user[0]" value="abc">
<input type="post" name="user[1]" value='abc'>

strcmp() will not return the values sent from this form as "0".

However, by using single-quotes or double-quotes to encapsulate BOTH values, strcmp() will return a "0" result. 

Have you verified this? I've never heard of it personally. Could it have something to do with "post" not being a valid value for the type attribute? Also, shouldn't the value of the name attribute just be user[] rather than user[0] or user[1]?

Edit:
It just occurred to me that if this is true it may be browser dependent since it has to do with how the form data is sent to the server. PHP wouldn't even be aware of which type of quote is used. Checking the value of each character in the string should reveal if there is a difference between the two strings:

PHP Code:

$strings = $_POST['user'];
foreach($strings as $str)
{
    $arr = array();
    $i = 0;
    
    while(isset($str[$i]))
    {
        $arr[] = ord($str[$i]);
        $i++;
    }
    
    print_r($arr);
} 


Good observation...