若是一個頁面的內容呈現,須要根據url上傳遞的參數來進行渲染。不少時候多是這樣子寫:xxx.com/xx?c=x&m=x& t=..,而咱們看到的url每每是這樣子的(以新浪微遊戲的咖啡戀人爲例) game.weibo.com/ilovecoffee….這種URL設計看上去比前一種更好一點:)php
若是咱們訪問一下不存在的遊戲應用,例如game.weibo.com/ilovecoffee222,則會輸出以下的錯誤提示:html
game.weibo.com後面匹配到的項,指向了某個php頁面,而後根據參數獲取要訪問的遊戲應用標識,後數據庫或者緩存裏查詢該應用標識,若是不存在則輸出錯誤提示,若是應用存在則加載遊戲應用連接地址。linux
如今寫一個php例子,假設個人ip爲192.168.0.33,我加了一層名爲router的路徑,以後跟隨的是 「/模塊名/方法名/參數1的key/參數1的value/….」數據庫
相似這樣的地址:緩存
192.168.0.33/router/Hello/router/a/b/c/d/abc/index.html?id=3&url=http:………………服務器
也就是要調用Ha這個模塊中的router方法,並傳入url後面的參數/a/b/c/d/index………….app
第一步,首先要在服務器的配置上對/router/路徑進行攔截post
調用某個文件夾目錄下的index.php頁面,假定如今全部模塊使用單獨的文件存放於class目錄下,該目錄與router平級,以下圖所示:測試
第二步,路由分發器的實現(index.php)ui
1: <!Doctype html>
2: <html>
3: <head>
4: <title>路由測試~~</title>
5: <meta http-equiv="content-type" content="text/html; charset=utf-8" />
6: </head>
7: <body>
8:
9: <?php
10:
11: date_default_timezone_set("Asia/Shanghai");
12:
13: define("MODULE_DIR", "../class/");
14:
15:
16: $_DocumentPath = $_SERVER['DOCUMENT_ROOT'];
17: $_FilePath = __FILE__;
18: $_RequestUri = $_SERVER['REQUEST_URI'];
19:
20: $_AppPath = str_replace($_DocumentPath, '', $_FilePath); //==>\router\index.php
21: $_UrlPath = $_RequestUri; //==>/router/hello/router/a/b/c/d/abc/index.html?id=3&url=http:
22:
23: $_AppPathArr = explode(DIRECTORY_SEPARATOR, $_AppPath);
24:
25: /**
26: * http://192.168.0.33/router/hello/router/a/b/c/d/abc/index.html?id=3&url=http:
27: *
28: * /hello/router/a/b/c/d/abc/index.html?id=3&url=http:
29: */
30:
31: for ($i = 0; $i < count($_AppPathArr); $i++) {
32: $p = $_AppPathArr[$i];
33: if ($p) {
34: $_UrlPath = preg_replace('/^\/'.$p.'\//', '/', $_UrlPath, 1);
35: }
36: }
37:
38: $_UrlPath = preg_replace('/^\//', '', $_UrlPath, 1);
39:
40: $_AppPathArr = explode("/", $_UrlPath);
41: $_AppPathArr_Count = count($_AppPathArr);
42:
43: $arr_url = array(
44: 'controller' => 'index',
45: 'method' => 'index',
46: 'parms' => array()
47: );
48:
49: $arr_url['controller'] = $_AppPathArr[0];
50: $arr_url['method'] = $_AppPathArr[1];
51:
52: if ($_AppPathArr_Count > 2 and $_AppPathArr_Count % 2 != 0) {
53: die('參數錯誤');
54: } else {
55: for ($i = 2; $i < $_AppPathArr_Count; $i += 2) {
56: $arr_temp_hash = array(strtolower($_AppPathArr[$i])=>$_AppPathArr[$i + 1]);
57: $arr_url['parms'] = array_merge($arr_url['parms'], $arr_temp_hash);
58: }
59: }
60:
61: $module_name = $arr_url['controller'];
62: $module_file = MODULE_DIR.$module_name.'.class.php';
63: $method_name = $arr_url['method'];
64:
65: if (file_exists($module_file)) {
66: include $module_file;
67:
68: $obj_module = new $module_name();
69:
70: if (!method_exists($obj_module, $method_name)) {
71: die("要調用的方法不存在");
72: } else {
73: if (is_callable(array($obj_module, $method_name))) {
74: $obj_module -> $method_name($module_name, $arr_url['parms']);
75:
76: $obj_module -> printResult();
77: }
78: }
79:
80: } else {
81: die("定義的模塊不存在");
82: }
83:
84:
85: ?>
86:
87: </body>
88: </html>
獲取請求的uri,而後拿到要加載的模塊名、調用方法名,對uri參數進行簡單的判斷..
第三步,模塊的編寫
根據上述的uri,咱們要調用的是Hello模塊下的router方法,那麼能夠在class目錄下定義一個名爲Hello.class.php的文件(注意linux下是區分大小寫的)
1: <?php
2:
3: class Hello {
4:
5: private $_name;
6: private $_varValue;
7:
8: function __construct() {
9:
10: }
11:
12: function router() {
13: $this->_name = func_get_arg(0);
14: $this->_varValue = func_get_arg(1);
15: }
16:
17: function printResult() {
18: echo $this->_name;
19: echo "<p>";
20: echo var_dump($this->_varValue);
21: echo "</p>";
22: }
23: }
24:
25: ?>
同理,咱們能夠編寫Ha模塊..
這算是實現了很簡單的url路由分發功能了…
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