PHP
//thinkPHP 路由定义规则
$route = array(
'news/:action/:year\d/:month/:day'=>'news/read?year=:2&month=:3&day=:4',
'news/:action^delete|update|insert/:year\d/:month/:day'=>array( 'news/read?extra=:2&status=1','year=:2&month=:3&day=:4'),
);

$url = 'http://www.test.com/index.PHP/news/read/2012/2/21/extraparam/test.html';

//后缀名
$extension = 'html';

//可知: $_SERVER['PATH_INFO'] = 'news/read/2012/2/21/extraparam/test.html';
$regx = 'news/read/2012/2/21/extraparam/test.html';

//循环匹配路由规则
foreach($route as $key=>$value){
//如果匹配成功，则不继续匹配
if(parseUrlRule($key,$value,$regx,$extension))
break;
}

//运行结果： 打印$_GET
//Array
// (
// [actionName] => read
// [moduleName] => news
// [extra] => 2012
// [status] => 1
// [extraparam] => test
// [year] => 2012
// [month] => 2
// [day] => 21
// [finalUrl] => news/read?extra=2012&status=1&extraparam=test&year=2012&month=2&day=21
// )
// [Finished in 0.6s]

//相当于访问: http://www.test.com/news/read?extra=2012&status=1&extraparam=test&year=2012&month=2&day=21

//在部署时会把index.PHP隐藏，开启apache的重写模块
//重写规则 ： RewriteRule ^(.+)$ /index.PHP/$1
//开启后，apache会自动把 http:/www.test.com/news/read/2012/2/21/extraparam/test.html转换为 http:/www.test.com/index.PHP/news/read/2012/2/21/extraparam/test.html

/**
* @$rule string 路由规则
* @$route string 规则映射的新地址
* @$regx string 地址栏pathinfo字符串
* @$extension stirng 伪静态拓展名
* return bool
*/
function parseUrlRule($rule,$route,$extension=null){
//去掉后缀名
!is_null($extension) && $regx = str_replace('.'.$extension,'',$regx);

//把路由规则和地址,分割到数组中，然后逐项匹配
$ruleArr = explode('/',$rule);
$regxArr = explode('/',$regx);

//$route以数组的格式传递，则取第一个
$url = is_array($route) ? $route[0] : $route;
$match =true;

//匹配检测
foreach($ruleArr as $key=>$value){
if(strpos($value,':')===0){
if(substr($value,-2)=='\\d' && !is_numeric($regxArr[$key])){
$match = false;
break;
}elseif(strpos($value,'^')){
$stripArr = explode('|',trim(strstr($value,'^'),'^'));
if(in_array($regxArr[$key],$stripArr)){
$match = false;
break;
}
}
//静态项不区分大小写
}elseif(strcasecmp($value,$regxArr[$key])!==0){
$match = false;
break;
}
}

//匹配成功
if($match){
//把动态变量写入到数组$matches 中，同时去除静态匹配项
foreach($ruleArr as $key=>$value){
if(strpos($value,':')===0){
//获取动态变量，作为数组下标
if(substr($value,-2,1)=='\\')
$matchKey = substr($value,1,-2);
elseif($pos=strpos($value,'^'))
$matchKey =substr($value,$pos-1);
else
$matchKey = substr($value,1);

$matches[$matchKey] = array_shift($regxArr);
}else
array_shift($regxArr); //去除静态匹配项
}

//获取数组中的值，目的是配合子模式进行替换
$values = array_values($matches);
//正则匹配替换,正则需要用'e'作为修饰符
$url = preg_replace('/:(\d+)/e','$values[\\1-1]',$url);

//解析url 格式: 分组/模块/操作?key1=value1&key2=value2
if(strpos($url,'?')!==false){
// 分组/模块/操作?key1=value1&key2=value2
$arr = parse_url($url);
$paths = explode('/',$arr['path']);
parse_str($arr['query'],$queryArr);
}elseif(strpos($url,'/')!==false) //分组/模块/操作)
$paths = explode('/',$url);
else // key1=value1&key2=value2
parse_str($url,$queryArr);

//获取 分组 模块 操作
if(!empty($paths)){
$var['actionName'] = array_pop($paths);
$var['moduleName'] = array_pop($paths);
if(!empty($paths)){
$groupList = 'Home,Admin';
$temp = array_pop($paths);
if(in_array($temp,explode(',',$groupList)))
$var['groupName'] = $temp;
}
}
//合并的到GET数组中，方便全局调用
$_GET = array_merge($_GET,$var);

//合并参数
if(isset($queryArr))
$_GET = array_merge($_GET,$queryArr);

//匹配url中剩余的参数
preg_replace('/(\w+)\/([^,\/]+)/e','$tempArr[\'\\1\']=\'\\2\'',implode('/',$regxArr));
if(!empty($tempArr))
$_GET = array_merge($_GET,$tempArr);

//route是数组的话
if(is_array($route)){
$route[1]=preg_replace('/:(\d+)/e',$route[1]);
parse_str($route[1],$var);
$_GET = array_merge($_GET,$var);
strpos($url,'?')!==false ? $der ='&' : $der='?';
//最终写入到$_GET中的参数，包括三个部分
//1.地址栏剩余参数
//2.路由地址中的参数
//3.$route是数组时的第二个参数
if(!empty($tempArr))
$var = array_merge($tempArr,$var);
$url .=$der.http_build_query($var);
}
$_GET['finalUrl'] = $url;
//保证$_REQUEST 也能访问
$_REQUEST = array_merge($_REQUEST,$_GET);
//结果
print_r($_GET);
return true;
}
return $match;
}

//以下是正则路由代码：
$rule = '/news\/read\/(\d+)\/(\d+)\/(\d+)/';
$route ='news/read?year=:1&month=:2&day=:3';
$regx = 'news/read/2012/2/21/extraparam/test.html';
$extension = 'html';
parseUrlRuleRegx($rule,$extension);

/**
* @$rule string 路由规则
* @$route string 规则映射的新地址
* @$regx string 地址栏pathinfo字符串
* @$extension stirng 伪静态拓展名
* return bool
*/
function parseUrlRuleRegx($rule,$extension=null){
!is_null($extension) && $regx = str_replace('.'.$extension,$regx);
$url = is_array($route) ? $route[0] : $route;
if(preg_match($rule,$matches)){
$url = preg_replace('/:(\d+)/e','$matches[\\1]',$url);
}else
return false;
//解析url 格式: 分组/模块/操作?key1=value1&key2=value2
if(strpos($url,'?')!==false){
// 分组/模块/操作?key1=value1&key2=value2
$arr = parse_url($url);
$paths = explode('/',$arr['path']);
parse_str($arr['query'],$queryArr);
}elseif(strpos($url,'/')!==false) //分组/模块/操作)
$paths = explode('/',$url);
else // key1=value1&key2=value2
parse_str($url,$queryArr);

//获取 分组 模块 操作
if(!empty($paths)){
$var['actionName'] = array_pop($paths);
$var['moduleName'] = array_pop($paths);
if(!empty($paths)){
$groupList = 'Home,Admin';
$temp = array_pop($paths);
if(in_array($temp,$groupList)))
$var['groupName'] = $temp;
}
}
//合并的到GET数组中，方便全局调用
$_GET = array_merge($_GET,$var);
if(isset($queryArr))
$_GET = array_merge($_GET,$queryArr);

//匹配剩余的参数
$regx = str_replace($matches[0],$regx);
preg_replace('/(\w+)\/([^,$regx);
if(!empty($tempArr)){
$_GET = array_merge($_GET,$tempArr);
strpos($url,'?')!==false ? $der='&':$der='?';
$url .=$der.http_build_query($tempArr);
}
if(is_array($route)){
$route[1] = preg_replace('/:(\d+)/e',$route[1]);
parse_str($route[1],$var);
if(!empty($var)){
!empty($queryArr) && $var =array_merge($queryArr,$var);
$_GET= array_merge($_GET,$var);
}
strpos($url,'?')!==false ? $der='&':$der='?';
$url .=$der.http_build_query($var);
}

$_GET['finalUrl'] = $url;
print_r($_GET);
$_REQUEST = array_merge($_GET,$_REQUEST);
return true;
}

//运行结果：
//Array
// (
// [actionName] => read
// [moduleName] => news
// [year] => 2012
// [month] => 2
// [day] => 21
// [extraparam] => test
// [finalUrl] => news/read?year=2012&month=2&day=21&extraparam=test
// )
// [Finished in 0.1s]