thinkphp/library/think/route/dispatch/Url.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\route\dispatch;

use think\exception\HttpException;
use think\Loader;
use think\route\Dispatch;

class Url extends Dispatch
{
    public function init()
    {
        // 解析默认的URL规则
        $result = $this->parseUrl($this->dispatch);

        return (new Module($this->request, $this->rule, $result))->init();
    }

    public function exec()
    {}

    /**
     * 解析URL地址
     * @access protected
     * @param  string   $url URL
     * @return array
     */
    protected function parseUrl($url)
    {
        $depr = $this->rule->getConfig('pathinfo_depr');
        $bind = $this->rule->getRouter()->getBind();

        if (!empty($bind) && preg_match('/^[a-z]/is', $bind)) {
            $bind = str_replace('/', $depr, $bind);
            // 如果有模块/控制器绑定
            $url = $bind . ('.' != substr($bind, -1) ? $depr : '') . ltrim($url, $depr);
        }

        list($path, $var) = $this->rule->parseUrlPath($url);
        if (empty($path)) {
            return [null, null, null];
        }

        // 解析模块
        $module = $this->rule->getConfig('app_multi_module') ? array_shift($path) : null;

        if ($this->param['auto_search']) {
            $controller = $this->autoFindController($module, $path);
        } else {
            // 解析控制器
            $controller = !empty($path) ? array_shift($path) : null;