關(guān)于php url路由的實(shí)現(xiàn)

這篇文章提供分享給大家，是關(guān)于php url路由的實(shí)現(xiàn)，下面的詳細(xì)的解析，希望對各位有所幫助。

1.符合規(guī)則定義的偽靜態(tài)訪問路徑解析

對于"test.php/user/lists/normal/id/2.html" 可解析為
control = user，action = lists，filter = normal，order = id，curPage = 3

對于"test.php/users/lists.html" 可解析為
control = user，action = lists，filter = all，order = ''，curPage = 1 可取得規(guī)則定義中的默認(rèn)值

2.不符合規(guī)則定義的偽靜態(tài)路徑解析

action,control 不符合規(guī)則
對于"test.php/users/lists/all/id1/1.html" 報(bào)錯(cuò)
試圖訪問不存在的頁面

不符合匹配模式
對于"test.php/user/lists/all/id1/1.html" 可解析為
control = user，action = lists，filter = all，order = ''，curPage = 1
可取得不符合匹配模式項(xiàng)目的默認(rèn)值,上例 order 不符合匹配模式

定義路由規(guī)則時(shí)可以定義默認(rèn)值,當(dāng)在pathinfo中找不到匹配的值，能取得默認(rèn)值

<?php

// url 路由規(guī)則定義

$urlRule = array(

    'user' => array(            // control

        'lists' => array(       // action

            //'名稱'    => '默認(rèn)值,值模式匹配'

            'filter'    => 'all,^(all|normal|admin)$',

            'order'     => ',^-?[a-zA-Z_]+$',

            'curPage'   => '1,^[0-9]+$',

          ),

    ),

);

function parseUrl(){

        $queryString = array();

        $GLOBALS['control'] = 'index';

        $GLOBALS['action'] = 'index';

        if (isset($_SERVER['PATH_INFO'])){

                //獲取  pathinfo

                $aPathInfo = explode('/', substr($_SERVER['PATH_INFO'], 1, strrpos($_SERVER['PATH_INFO'], '.')-1));

                // 獲取 control

                $GLOBALS['control'] = $aPathInfo[0];

                array_shift($aPathInfo);

                // 獲取 action

                $GLOBALS['action'] = (isset($aPathInfo[0]) ? $aPathInfo[0] : 'index');

                array_shift($aPathInfo);

                // 獲取 入口文件名

                $GLOBALS['PHP_SELF'] = str_replace($_SERVER['PATH_INFO'], '', $_SERVER['PHP_SELF']);

                $queryString = $aPathInfo;

        }

        parseQueryString($queryString);

}

function parseQueryString(array$aQueryString){

        $queryString = array();

        // control 與 action 為默認(rèn)值時(shí) 

        if ($GLOBALS['control'] == 'index' && $GLOBALS['action'] == 'index'){

                $GLOBALS['queryString'] = $queryString;

                return true;

        }

        global $urlRule;

        if (isset($urlRule[$GLOBALS['control']][$GLOBALS['action']])){

                $aActionRule = &$urlRule[$GLOBALS['control']][$GLOBALS['action']];

                foreach ($aActionRule as $key=>$val){

                        // 規(guī)則值為 '' 時(shí)

                        if ($val == '') {

                                $queryString[$key] = '';

                                continue;

                        }

                        if (isset($aQueryString[0])){

                                // 取得正則表達(dá)式

                                $pattern = '/'.substr($val, strpos($val, ',')+1).'/';

                                // 模式匹配

                                if (preg_match($pattern, $aQueryString[0])){

                                        // 取值

                                        $queryString[$key] = $aQueryString[0];

                                        // 彈出值

                                        array_shift($aQueryString);

                                }else {

                                        // 取默認(rèn)值

                                        $queryString[$key] = substr($val, 0, strpos($val, ','));

                                }

                        }else {

                                // 取默認(rèn)值

                                $queryString[$key] = substr($val, 0, strpos($val, ','));

                        }

                }

                $GLOBALS['queryString'] = $queryString;

        }else {

                throw new Exception('試圖訪問不存在的頁面');

        }

}

parseUrl();

var_dump($GLOBALS['control']);

var_dump($GLOBALS['action']);

var_dump($GLOBALS['queryString']);

?>

**
         * Pathinfo函數(shù)
         * 功能:將URL中的Pathinfo解析為$_GET全局變量
         * 返回值:解析成功返回true否則為fasle
         * 例如:http://hostname/page.php/argv/argc/a/1/b/2.html
         * 將會(huì)解析為$_GET['argv']='argc';$_GET['a']=1;$_GET['b']=3;
         */
        function pathinfo(){
                $pathinfo=explode('/',$_SERVER['PATH_INFO']);
                $count=count($pathinfo);
                for($foo=1;$foo<$count;$foo+=2){
                        $_GET[$pathinfo[$foo]]=($foo+2)==$count?array_shift(explode('.',$pathinfo[$foo+1])):$pathinfo[$foo+1];
                }
        }
        /**
         * rewrite函數(shù)
         * 功能:
         */
        Function rewrite($url=null){
                return REWRITE?$url.'.html':$_SERVER['PHP_SELF'].$url.'.html';
        }