intraface / intraface.dk

            if (isset($this->fonts[$cf]) && $this->fonts[$cf]['isUnicode']) {

                $text = $this->utf8toUtf16BE($text, $bom); // convert utf8 chars into utf16

                // store all used characters if subset font is set to true

                if ($this->fonts[$cf]['isSubset']) {

                    for ($i = 0; $i < mb_strlen($text, 'UTF-16BE'); $i++) {

                        $this->fonts[$cf]['subset'][mb_substr($text, $i, 1, 'UTF-16BE')] = true;

                    }

                }

            } else {

                $text = mb_convert_encoding($text, $this->targetEncoding);

                $hexStr = $this->strToHex($text);

                $text = mb_convert_encoding($text, $this->targetEncoding);

                $hexStr = $this->strToHex($text);

                // store all used characters if subset font is set to true

                if ($this->fonts[$cf]['isSubset']) {

                    for ($i = 0; $i < (strlen($hexStr) / 2); $i++) {

                        array_push($this->fonts[$cf]['subset'], substr($hexStr, ($i * 2), 2));

                    }

                }

            }

        }

        $text = strtr($text, array(')' => '\\)', '(' => '\\(', '\\' => '\\\\', chr(8) => '\\b', chr(9) => '\\t', chr(10) => '\\n', chr(12) => '\\f' ,chr(13) => '\\r'));