Description:
------------
Adding a string class to PHP would be greatly appreciated. It would 
allow for direct operations on a string:

<?php
$helloWorld = 'Hello World';

// Assign string 'Hello' to $hello
$hello = $helloWorld->subString(0, 5);
?>

Of course it would support a whole lot more string operations. See C# 
or Java as reference for example.
It should also be compatible with the current string functions. PHP 6 
would be a nice target for this feature.

If for some reason it's not possible to combine this with the current 
approach, consider looking at Objective-C's solution. It requires an @ 
to be appended before the string, so it becomes a NSString instead of  
a regular C string.