think\template\TagLib::parseAttr PHP Метод

    public function parseAttr($str, $name, $alias = '')
    {
        $regex = '/\\s+(?>(?P<name>[\\w-]+)\\s*)=(?>\\s*)([\\"\'])(?P<value>(?:(?!\\2).)*)\\2/is';
        $result = [];
        if (preg_match_all($regex, $str, $matches)) {
            foreach ($matches['name'] as $key => $val) {
                $result[$val] = $matches['value'][$key];
            }
            if (!isset($this->tags[$name])) {
                // 检测是否存在别名定义
                foreach ($this->tags as $key => $val) {
                    if (isset($val['alias'])) {
                        $array = (array) $val['alias'];
                        if (in_array($name, explode(',', $array[0]))) {
                            $tag = $val;
                            $type = !empty($array[1]) ? $array[1] : 'type';
                            $result[$type] = $name;
                            break;
                        }
                    }
                }
            } else {
                $tag = $this->tags[$name];
                // 设置了标签别名
                if (!empty($alias) && isset($tag['alias'])) {
                    $type = !empty($tag['alias'][1]) ? $tag['alias'][1] : 'type';
                    $result[$type] = $alias;
                }
            }
            if (!empty($tag['must'])) {
                $must = explode(',', $tag['must']);
                foreach ($must as $name) {
                    if (!isset($result[$name])) {
                        throw new Exception('tag attr must:' . $name);
                    }
                }
            }
        } else {
            // 允许直接使用表达式的标签
            if (!empty($this->tags[$name]['expression'])) {
                static $_taglibs;
                if (!isset($_taglibs[$name])) {
                    $_taglibs[$name][0] = strlen(ltrim($this->tpl->config('taglib_begin'), '\\') . $name);
                    $_taglibs[$name][1] = strlen(ltrim($this->tpl->config('taglib_end'), '\\'));
                }
                $result['expression'] = substr($str, $_taglibs[$name][0], -$_taglibs[$name][1]);
                // 清除自闭合标签尾部/
                $result['expression'] = rtrim($result['expression'], '/');
                $result['expression'] = trim($result['expression']);
            } elseif (empty($this->tags[$name]) || !empty($this->tags[$name]['attr'])) {
                throw new Exception('tag error:' . $name);
            }
        }
        return $result;
    }