php的路由规则
php里的路由的意思是
地址转发
，那么可以在生成URL的函数里传入各个参数生成一个新的的地址（而这个地址也就是伪静态地址）
先说下我的大体思路：
第一、服务器上apache或者nginx把伪静态rewrite到实际地址。
第二、在PHP生成URL地址的时候做url的规则（而这个规则就路由文件）替换。
第三、保证用户访问的一定是伪静态地址，当用户访问非伪静态地址的时候PHP端根据
$_SERVER['REQUEST_URI']判断其是否非伪静态地址，如果不是就跳转到路由表规定的伪静态地址。
伪静态配置(nginx.conf)
路由表文件location / {rewrite ^/?([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = blog & id = $1 last ;rewrite ^/?([ 0 - 9 ]+)-([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = blog & id = $1 & p = $2 last ;rewrite ^/? about . html$ / index . php ? m = Blog & a = about last ;rewrite ^/? tags . html$ / index . php ? m = Blog & a = tags last ;rewrite ^/? notebook . html$ / index . php ? m = Blog & a = blogList & nav = 1 last ;rewrite ^/? notebook -([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = blogList & nav = 1 & p = $1 last ;rewrite ^/? homesick . html$ / index . php ? m = Blog & a = blogList & nav = 2 last ;rewrite ^/? homesick -([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = blogList & nav = 2 & p = $1 last ;rewrite ^/? playground . html$ / index . php ? m = Blog & a = blogList & nav = 3 last ;rewrite ^/? playground -([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = blogList & nav = 3 & p = $1 last ;rewrite ^/? tag -([ 0 - 9 ]+). html$ / index . php ? m = Blog & a = readByTags & tag = $1 last ;}
Url函数以及路由函数return array (//一级路由'blog/index' => './' ,'blog/about' => 'about.html' ,'blog/tags' => 'tags.html' ,//二级路由'blog/blog' => array (1 => '[id].html' ,2 => '[id]-[p].html'),'blog/readbytags' => array (1 => 'tag-[tag].html' ,2 => 'tag-[tag]-[p].html'),//三级路由'blog/bloglist' => array ('nav' => array ('1' => array (1 => 'notebook.html' ,2 => 'notebook-[p].html' ,),'2' => array (1 => 'homesick.html' ,2 => 'homesick-[p].html' ,),'3' => array (1 => 'playground.html' ,2 => 'playground-[p].html' ,),)));
/*** Url地址构造函数* @param string $url 控制器和方法 'Blog/blog'* @param array $params array('id'=>1,'p'=>3)* @return string $real_url 伪静态地址 或者真实的$_SERVER['QUERY_STRING']*/function U ( $url , $params = null ){//是否开启路由if ( ROUTE ){//导入路由static $router_ruler = array ();if ( empty ( $router_ruler )){$router_ruler = include ( dirname ( __FILE__ ). '/route.php' );}$real_url = route ( $router_ruler , $url , $params );} else {$real_url = urlBuild ( $url , $params );}return $real_url ;}/*** @param array $router_ruler 路由表* @param string $url 路由键* @param array $params 参数列表*/function route ( $router_ruler , $url , $params ){//路由规则里全写成小写吧$router_key = strtolower ( trim ( trim ( $url ), '/' ));if ( isset ( $router_ruler [ $router_key ])){//一级路由$real_url = $router_ruler [ $router_key ];//由于规定参数格式必须是数组，所以这里只存在是数组和不是数组（为空）的情况if ( is_array ( $real_url )){//看其是不是索引数组if ( array_product ( array_map ( 'is_numeric' , array_keys ( $real_url )))== 1 ){//二级路由if ( is_array ( $params )){$real_url = routeMatch ( $real_url [ count ( $params )], $params );}} else {//三级路由foreach ( $params as $k => $v ){if ( array_key_exists ( $k , $real_url )){$routeReg = $real_url [ $k ][ $v ][ count ( $params )];unset ( $params [ $k ]);$real_url = routeMatch ( $routeReg , $params );}}}}} else {$real_url = urlBuild ( $url , $params );}return $real_url ;}/*** 配合http_build_query实现正常的动态地址，类似于index.php?m=xxx&a=xxx&id=xxx&p=xxx* @param string $url 控制器和方法* @param array $params 参数列表* @return string $real_url 实际地址*/function urlBuild ( $url , $params ){$url = explode ( '/' , trim ( $url , '/' ));$real_url = SITE_URL . '?m=' . $url [ 0 ]. '&a=' . $url [ 1 ];if ( $params ){if ( is_array ( $params )){$params = http_build_query ( $params );$params = urldecode ( $params );}$real_url .= '&' . $params ;}return $real_url ;}/*** 路由匹配* @param string $routeReg 路由规则字符串，类似于'tag'=>'tag_[tag].html'* @param string $params 需要替换正则字符串里面的关键字的实际参数值* @return string $routeReg 返回最终匹配完的伪静态地址*/function routeMatch ( $routeReg , $params ){foreach ( $params as $key => $value ){if ( strstr ( $routeReg , '[' . $key . ']' )){$routeReg = str_replace ( '[' . $key . ']' , $value , $routeReg );}}return $routeReg ;}
在头部添加路由判断保证最终访问地址为伪静态地址
if ( defined ( 'ROUTE' ) && ROUTE ){if ( strstr ( $_SERVER [ 'REQUEST_URI' ], 'index.php' )){parse_str ( $_SERVER [ 'QUERY_STRING' ], $params );if ( in_array ( $params [ 'a' ], array ( 'blog' , 'bloglist' , 'readbytags' ))){switch ( strtolower ( $params [ 'a' ])){case 'blog' :$route = $params [ 'id' ];break ;case 'bloglist' :$type = array ( 1 => 'notebook' , 2 => 'homesick' , 3 => 'playground' );$route = $type [ $params [ 'nav' ]];break ;case 'readbytags' :$route = 'tag-' . $params [ 'tag' ];break ;}if ( $params [ 'p' ]< 2 ){header ( 'Location:' . SITE . '/' . $route . '.html' );} else {header ( 'Location:' . SITE . '/' . $route . '-' . $params [ 'p' ]. '.html' );}}}}