Alias /labs/ "E:/ecc_ecd_rep/labs_proj/trunk/"
<Directory "E:/ecc_ecd_rep/labs_proj/trunk/">
Options Indexes FollowSymLinks
AllowOverride All
Order deny,allow
allow from all
</Directory>
其中关键的是这句 AllowOverride All 允许使用mod_rewrite模块
3、在.htaccess文件中，需要使用 RewriteBase ，不然rewrite无法生效。
举个例子：
RewriteEngine On
# Some hosts may require you to use the `RewriteBase` directive.
# If you need to use the `RewriteBase` directive, it should be the
# absolute physical path to the directory that contains this htaccess file.
#
RewriteBase /labs/jdpat/import/api/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]
这种写法称为： IIFE （Imdiately Invoked Function Expression 立即执行的函数表达式）。
一步步来分析这段代码。
先弄清 函数表达式（function expression）和 函数声明（function declaration）的区别： 函数表达式 Function Expression – var test = function() {}; 函数申明 Function Declaration – function test() {};
函数表达式中的函数可以为匿名函数，也可以有函数名，但是该函数实际上不能直接使用，只能通过表达式左边的变量 a 来调用。
var a = function(){
alert('Function expression');
}
var b = new a();
// Anonymous function that has three arguments
function(window, document, $) {
// You can now reference the window, document, and jQuery objects in a local scope
}(window, document, window.jQuery); // The global window, document, and jQuery objects are passed into the anonymous function
// Anonymous function that has three arguments
function(w, d, $) {
// You can now reference the window, document, and jQuery objects in a local scope
}(window, document, window.jQuery); // The global window, document, and jQuery objects are passed into the anonymous function
3、避免全局命名冲突 。当使用jQuery的时候，全局的window.jQuery对象 作为一个参数传递给$，在匿名函数内部你再也不需要担心$和其他库或者模板申明冲突。 正如James padolsey所说： An IIFE protects a module’s scope from the environment in which it is placed.
b页面不需要使用Kindeditor，没有引入kindeditor.js。但是在合并JS代码后，b页面也会执行a.js中的代码，页面报错Uncaught ReferenceError: KindEditor is not defined。也就是b页面执行了KindEditor，难道所有页面都要加载Kindeditor源文件？ 可以这么修改a.js，将KindEditor变量参数化，通过给立即执行的函数表示式的参数赋值，那么其他页面都不需要加载Kindeditor源文件
(function (library) {
// Calls the second IIFE and locally passes in the global jQuery, window, and document objects
library(window, document, window.jQuery);
}
// Locally scoped parameters
(function (window, document, $) {
// Library code goes here
}));
// IIFE - Immediately Invoked Function Expression
+function(yourcode) {
// The global jQuery object is passed as a parameter
yourcode(window.jQuery, window, document);
}(function($, window, document) {
// The $ is now locally scoped
// Listen for the jQuery ready event on the document
$(function() {
// The DOM is ready!
}));
具体请看工程师，请优化你的代码
其他 在Bootstrap和其他插件中经常看到如下写法：
+function ($) { "use strict";
}(window.jQuery);
关于字符串”use strict”;请看严格模式
参考资料： 《Javascript高级程序设计（第3版）》 7.3 模仿块级作用域 Immediately-Invoked Function Expression (IIFE) – Ben Alman ECMA-262-3 in detail. Chapter 5. Functions. – Dmitry A. Soshnikov Functions and function scope – Mozilla Developer Network Named function expressions – Juriy “kangax” Zaytsev JavaScript Module Pattern: In-Depth – Ben Cherry Closures explained with JavaScript – Nick Morga what does function function window jquery do – Stackoverflow
function getDescription($html){
// Get the 'content' attribute value in a <meta name="description" ... />
$matches = array();
// Search for <meta name="description" content="Buy my stuff" />
preg_match('/<meta.*?name=("|\')description("|\').*?content=("|\')(.*?)("|\')/i', $html, $matches);
if (count($matches) > 4) {
return trim($matches[4]);
}
// Order of attributes could be swapped around: <meta content="Buy my stuff" name="description" />
preg_match('/<meta.*?content=("|\')(.*?)("|\').*?name=("|\')description("|\')/i', $html, $matches);
if (count($matches) > 2) {
return trim($matches[2]);
}
// No match
return null;
}
