NO LONGER MAINTAINED

PHP 7 now has native Unicode support.

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php-unicode

Utilities for working with Unicode characters in PHP.

The following prints a multi-byte tick mark from the code point U+2714.

   require('u.php');  
   header('Content-Type: text/html; charset=utf8', true );  
   echo u('\u2714');  

For further documentation, see the tests.