<?php $this->text = preg_replace('/&(#(?:x[a-fA-F0-9]+|[0-9]+);)/', '&\1', $this->text);
$this->text = mb_encode_numericentity($this->text, array(0x0080, 0xffff, 0, 0xffff), 'UTF-8');
$box = imagettfbbox($this->getPointSize(), 0, $this->file, $this->text);