Jarves\Translation\Utils::parsePo PHP Method

    public function parsePo($file)
    {
        $res = array('container' => array(), 'translations' => array(), 'file' => $file);
        if (!file_exists($file)) {
            return $res;
        }
        $lastPluralId = $lastId = $lastWasPlural = $inHeader = $nextIsThisContext = null;
        $fh = fopen($file, 'r');
        while (($buffer = fgets($fh)) !== false) {
            if (preg_match('/^msgctxt "(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                $lastWasPlural = false;
                $nextIsThisContext = $match[1];
            }
            if (preg_match('/^msgid "(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                $lastWasPlural = false;
                if ($match[1] == '') {
                    $inHeader = true;
                } else {
                    $inHeader = false;
                    $lastId = $match[1];
                    if ($nextIsThisContext) {
                        $lastId = $nextIsThisContext . "" . $lastId;
                        $nextIsThisContext = false;
                    }
                }
            }
            if (preg_match('/^msgstr "(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                if ($inHeader == false) {
                    $lastWasPlural = false;
                    $res['translations'][static::evalString($lastId)] = static::evalString($match[1]);
                }
            }
            if (preg_match('/^msgid_plural "(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                if ($inHeader == false) {
                    $lastWasPlural = true;
                    $res['plurals'][static::evalString($lastId)] = static::evalString($match[1]);
                }
            }
            if (preg_match('/^msgstr\\[([0-9]+)\\] "(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                if ($inHeader == false) {
                    $lastPluralId = intval($match[1]);
                    $res['translations'][static::evalString($lastId)][$lastPluralId] = static::evalString($match[2]);
                }
            }
            if (preg_match('/^"(((\\\\.)|[^"])*)"/', $buffer, $match)) {
                if ($inHeader == true) {
                    $fp = strpos($match[1], ': ');
                    $res['container'][substr($match[1], 0, $fp)] = str_replace('\\n', '', substr($match[1], $fp + 2));
                } else {
                    if (is_array($res['translations'][$lastId])) {
                        $res['translations'][static::evalString($lastId)][$lastPluralId] .= static::evalString($match[1]);
                    } else {
                        if ($lastWasPlural) {
                            $res['plurals'][static::evalString($lastId)] .= static::evalString($match[1]);
                        } else {
                            $res['translations'][static::evalString($lastId)] .= static::evalString($match[1]);
                        }
                    }
                }
            }
        }
        return $res;
    }