- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
<?php
var_dump(mb_convert_encoding('&2D7d6g-', 'UTF-8', 'UTF7-IMAP'));
var_dump(mb_convert_encoding('&2d7d6g-', 'UTF-8', 'UTF7-IMAP'));
var_dump(mb_convert_encoding('&2D7D6G-', 'UTF-8', 'UTF7-IMAP'));