本代码是在apache上的LoadModule rewrite_module modules/mod_rewrite.so运行成功后的操作,利用php代码对网站url重定向为更复杂的逻辑结构

对于apache的rewrite模块打开和设置则非本文主题,请见其他文章详解.
这个类只能php 5.30以上的版本才能使用,继承了上一个版本的快速重定向的特点(单独类,全部使用静态调用),增添了一个很重要的功能和属性 可以调用其他url中的模块了 也使得模块与模块间或页面与页面间的函数简化共享得以实现
.htaccess文件写法:

 
#-------------- .htaccess start --------------- 
RewriteEngine on 
RewriteRule !\.(js|ico|gif|jpg|png|css|swf|htm|txt)$ index.php 
php_flag magic_quotes_gpc off 
php_flag register_globals off 
#-------------- .htaccess end --------------- 

重写功能引入:让站点根目录的index.php末尾写上下列代码,重写就开启了(正常条件:1.apache的重写配置成功,且开启了.htaccess支持的.2.站点根目录的.htaccess文件设置好了.3.class.rewrite.php类文件在index.php前面部分加载了.4.页面模块文件位置及写法无误):

 
//............ 
Rewrite::__config( 
$config['path'],/*'http://xxxxx/mysite/'URL基础位置*/ 
$config['md_path'],/*'c:/phpsite/www/mysite/modules/'模块文件物理目录*/ 
array( 
'phpinfo' 
) 
); 
Rewrite::__parse(); 
//.......... 

模块文件写法:
testPk.php

 
<?php 
class Rw_testPk extends Rewrite { 
//这个是前导函数,只要访问到testpk这个页面,这个必然会执行,可用来控制本页面内函数访问权限或本页面全局变量 
public static function init(){ 
//if (!defined('SITE_PASS')){ 
echo self::$linktag.'<br/>';//self::$linktag是页面解析位置路径值,会常使用. 
//} 
} 
//当访问"http://localhost/testpk/"时会执行 
public static function index(){ 
echo 'test'; 
} 
//当访问"http://localhost/testpk/blank"时会执行或写作"http://localhost/testpk/index/blank"一般"index/"都是可以被省略的 
public static function blank(){} 
} 
?> 

class.rewrite.php;

 
<?php 
class Rewrite{ 
public static $debug = false;//是否打开调试 
public static $time_pass = 0;//获得模块文件整体执行时间 
public static $version = 2.2; 
public static $pretag = 'Rw_';//模块文件类的名称前缀 
public static $linktag = 'index';//页面链接标记,用来标记解析的是那个链接,可用来控制各种菜单效果和链接访问权限 
protected static $time_start = 0; 
protected static $time_end = 0; 
protected static $physical_path = '';//模块文件的物理路径 
protected static $website_path = '';//模块文件的站点路径,因为可能把站点放大站点的子目录下,如:http://localhost/site/mysite 
protected static $ob_contents = ''; 
protected static $uid = 0;//配合个人主页访问方式 如http://localhost/423/则是访问http://localhost/profile?uid=423 
//允许的系统函数如$allow_sys_fun=array('phpinfo')那么系统将允许链接访问phpinfo内容了,当http://localhost/phpinfo或http://localhost/......./phpinfo时就会直接执行phpinfo这个函数,不需要phpinfo.php模块文件 
private static $allow_sys_fun = array(); 
private static function __get_microtime(){ 
list($usec, $sec) = explode(" ",microtime()); 
return ((float)$usec + (float)$sec); 
} 
//设置调试Rewrite::__debug(true); 
public static function __debug($d = true){ 
static::$debug = $d; 
} 
//配置路径和允许函数 
public static function __config($website_path = '',$physical_path = '',$allow_sys_fun = array()){ 
self::$physical_path = $physical_path; 
self::$website_path = $website_path; 
self::$allow_sys_fun = $allow_sys_fun; 
} 
//调试函数 
public static function __msg($str){ 
if(static::$debug){ 
echo "\n<pre>\n".print_r($str,true)."\n</pre>\n"; 
} 
} 
//解析开始时间 
public static function __start(){ 
self::$time_start = self::__get_microtime(); 
} 
//解析结束时间 
public static function __end($re = false){ 
self::$time_end = self::__get_microtime(); 
self::$time_pass = round((self::$time_end - self::$time_start),6) * 1000; 
if($re){ 
return self::$time_pass; 
}else{ 
self::__msg('PASS_TIME: '.self::$time_pass.' ms'); 
} 
} 
//内部跨模块url解析调用,如在test1.php模块页面中执行了Rwrite::__parseurl('/test2/show')这句,将调用test2.php模块页面中的show方法(Rw_test2这个class的方法) 
public static function __parseurl($url = '',$fun = '',$data = NULL){ 
if(!empty($url)&&!empty($fun)){ 
$p = static::$physical_path; 
if(file_exists($p.$url) || file_exists($p.$url.'.php') ){ 
$part = strtolower(basename( $p.$url , '.php' )); 
static::$linktag = $part.'/'.$fun; 
$fname = static::$pretag.$part; 
if(class_exists($fname, false)){ 
if(method_exists($fname,$fun)){ 
return $fname::$fun($data); 
} 
}else{ 
include( $p.$url ); 
if( class_exists($fname, false) && method_exists($fname,$fun)){ 
return $fname::$fun($data); 
} 
} 
} 
} 
} 
//核心链接解析函数Rwrite::__parse();在顶级重写核心定向目标index.php中的执行,意味着Rwrite自定义重写开启 
public static function __parse($Url = ''){ 
self::__start(); 
$p = static::$physical_path; 
$w = static::$website_path; 
$req_execute = false; 
$url_p = empty($Url) ? $_SERVER['REQUEST_URI'] : $Url; 
$local = parse_url($w); 
$req = parse_url($url_p); 
$req_path = preg_replace('|[^\w/.\\\]|','',$req['path']); 
$req_para = empty($Url) ? strstr($_SERVER['SERVER_NAME'],'.',true) : 'www'; 
if(empty($Url) && substr_count($_SERVER['SERVER_NAME'],'.') == 2 && $req_para != 'www'){ 
self::__goto($req_para,preg_replace('|^'.$local['path'].'|',"",$req_path)); 
return ; 
}else{ 
$req_path_arr = empty($req_path)?array():preg_split("|[/\\\]+|",preg_replace('|^'.$local['path'].'|',"",$req_path)); 
$req_fun = array_pop($req_path_arr); 
if(substr($req_fun,0,2)=='__'){ 
$req_fun = substr($req_fun,2); 
} 
$req_path_rearr = array_filter($req_path_arr); 
self::__msg($req_path_rearr); 
$req_temp = implode('/',$req_path_rearr); 
$fname = $req_temp.'/'.$req_fun; 
if(!empty($req_fun)&&in_array($req_fun,static::$allow_sys_fun)){ 
$req_fun(); 
}else{ 
if(!empty($req_fun)&&file_exists($p.$fname.'.php') ){ 
include( $p.$fname.'.php' ); 
}else{ 
$fname = empty($req_temp) ? 'index' : $req_temp; 
if(file_exists($p.$fname.'.php') ){ 
include( $p.$fname.'.php' ); 
}else{ 
$fname = $req_temp.'/index'; 
if(file_exists($p.$fname.'.php')){ 
include( $p.$fname.'.php' ); 
}else{ 
//这个地方是对"个人主页"的这种特殊链接定向到"profile/"了,可自己修改 
//如:www.xxx.com/12/将表示www.xxx.com/profile/?uid=12或www.xxx.com/profile?uid=12 
$uid = is_numeric($req_temp) ? $req_temp : strstr($req_temp, '/', true); 
$ufun = is_numeric($req_temp) ? 'index' : strstr($req_temp, '/'); 
if(is_numeric($uid)){ 
self::$uid = $uid; 
if(!isset($_GET['uid'])) $_GET['uid'] = $uid; 
$fname = 'profile/'.$ufun; 
if(file_exists($p.$fname.'.php')){ 
include( $p.$fname.'.php' ); 
}else{ 
header("location:".$w); 
exit(); 
} 
}else if(file_exists($p.'index.php')){ 
$fname = 'index'; 
include( $p.'index.php' ); 
}else{ 
header("location:".$w); 
exit(); 
} 
} 
} 
} 
$ev_fname = strrpos($fname,'/')===false ? $fname : substr($fname,strrpos($fname,'/')+1); 
$ev_fname = static::$pretag.$ev_fname; 
if( class_exists($ev_fname, false) && method_exists($ev_fname,$req_fun)){ 
static::$linktag = $req_fun=='index' ? $fname.'/' : $fname.'/'.$req_fun; 
if($req_fun != 'init' && method_exists($ev_fname,'init')){ 
$ev_fname::init(); 
} 
$ev_fname::$req_fun(); 
}else if( class_exists($ev_fname, false) && method_exists($ev_fname,'index') ){ 
static::$linktag = $fname.'/'; 
if(method_exists($ev_fname,'init')){ 
$ev_fname::init(); 
} 
$ev_fname::index(); 
}else if( $fname != 'index' && class_exists(static::$pretag.'index', false) && method_exists(static::$pretag.'index','index') ){ 
$ev_fname = static::$pretag.'index'; 
static::$linktag = 'index/'; 
if(method_exists($ev_fname,'init')){ 
$ev_fname::init(); 
} 
$ev_fname::index(); 
}else{ 
self::__msg('Function Not Exist!'); 
} 
} 
} 
self::__end(); 
} 
//这里是用户自定义链接的解析(用数据库存储的解析值) 如: xiaoming.baidu.com 
//数据库中 xiaoming这个标签指向一个人的博客 就会到了www.baidu.com/blog?uid=12或www.baidu.com/blog?uname=xiaoming(这个就看自己咋设计数据库了) 
public static function __goto($para = '',$path = ''){ 
$w = static::$website_path; 
if(empty($para)){ 
exit('未知链接,解析失败,不能访问'); 
} 
if(class_exists('Parseurl')){ 
$prs = Parseurl::selectone(array('tag','=',$para)); 
self::__msg($prs); 
if(!empty($prs)){ 
$parastr = $prs['tag']; 
$output = array(); 
$_GET[$prs['idtag']] = $prs['id']; 
parse_str($prs['parastr'], $output); 
$_GET = array_merge($_GET,$output); 
$path = $prs['type'].'/'.preg_replace('|^/'.$prs['type'].'|','',$path); 
self::__msg($path); 
header('location:'.$w.$path.'?'.http_build_query($_GET)); 
exit(); 
}else{ 
header("location:".$w); 
exit(); 
} 
}else{ 
header("location:".$w); 
exit(); 
} 
} 
} 
?>