php文章URL规则,如何实现一个php框架系列文章【4】url路由管理

//url重写模式

if (! empty ( $_REQUEST [ &＃39;_rewrite&＃39; ]) && is_string ( $_REQUEST [ &＃39;_rewrite&＃39; ])) {

//1.支持apache 重写模式下?后的参数缺失的情况

if ( stripos ( $_SERVER [ &＃39;SERVER_SOFTWARE&＃39; ], &＃39;nginx&＃39; ) &＃61;&＃61;&＃61; false) {

$_REQUEST [ &＃39;_rewrite&＃39; ] &＃61; urldecode( substr ( $_SERVER [ &＃39;QUERY_STRING&＃39; ], strlen ( &＃39;_rewrite&＃61;&＃39; )));

}

//2. 丢弃_rewrite中的后缀名

$rewrite &＃61; substr ( $_REQUEST [ &＃39;_rewrite&＃39; ], 0, strrpos ( $_REQUEST [ &＃39;_rewrite&＃39; ], &＃39;.&＃39; ));

//3. 支持/作为分隔符

$sp &＃61; &＃39;.&＃39; ;

for ( $i &＃61; 0; $i

if (in_array( $rewrite [ $i ], array ( &＃39;.&＃39; , &＃39;/&＃39; ))) {

$sp &＃61; $rewrite [ $i ];

break ;

}

}

$rewrite &＃61; explode ( $sp , $rewrite , 4);

//最后1段是必填后缀名

switch ( count ( $rewrite )) {

case 3:

case 4: {

$_GET [ &＃39;_a&＃39; ] &＃61; $_REQUEST [ &＃39;_a&＃39; ] &＃61; $rewrite [0];

$_GET [ &＃39;_u&＃39; ] &＃61; $_REQUEST [ &＃39;_u&＃39; ] &＃61; $rewrite [1]. &＃39;.&＃39; . $rewrite [2];

if (! empty ( $rewrite [3])) {

if ( strpos ( $rewrite [3], &＃39;/&＃39; )) {

$params &＃61; explode ( &＃39;/&＃39; , $rewrite [3]);

for ( $i &＃61;0; $i &＃43;1

$_REQUEST [urldecode( $params [ $i ])] &＃61; urldecode( $params [ $i &＃43;1]);

}

}

else {

foreach ( explode ( &＃39;&&＃39; , $rewrite [3]) as $p ) {

list( $k , $v ) &＃61; explode ( &＃39;&＃61;&＃39; , $p , 2);

$_REQUEST [urldecode( $k )] &＃61; urldecode( $v );

}

}

}

break ;

}

case 2:

$_GET [ &＃39;_a&＃39; ] &＃61; $_REQUEST [ &＃39;_a&＃39; ] &＃61; $rewrite [0];

$_GET [ &＃39;_u&＃39; ] &＃61; $_REQUEST [ &＃39;_u&＃39; ] &＃61; $rewrite [1];

break ;

case 1:

$_GET [ &＃39;_a&＃39; ] &＃61; $_REQUEST [ &＃39;_a&＃39; ] &＃61; $rewrite [0];

break ;

default :

break ;

}

}