PHP与JavaScript下的Cookie操作

下面的例子列出几种情形交互场景，列出JS和php交互的方法。总结下，以免日后再为cookie问题困扰。

setcookie.php

getcookie.php

总结:

1. php用自身函数读取php 的cookie，没有任何障碍，无需解码处理。
2. js采用cookie.js方法读取js 的cookie，没有任何障碍，无需解码处理。
3. js读取php的中文cookie，需要做 "decodeURIComponent (escape(php_cn_ck)) "函数处理
4. php读取js的中文cookie 需要做 "unescape()" 函数处理

cookie.js

	var Cookies = {}; 
	/** 
	* 设置Cookies 
	*/ 
	Cookies.set = function(name, value){ 
		var argv = arguments; 
		var argc = arguments.length; 
		var expires = (argc > 2) ? argv[2] : null; 
		if(expires != null){ 
        	var exp　　 = new Date(); 
	 		exp.setTime(exp.getTime() + 8*3600 + expires); 
		} 
		alert(exp.toGMTString()); 
		var path = (argc > 3) ? argv[3] : '/'; 
		var domain = (argc > 4) ? argv[4] : null; 
      	var secure = (argc > 5) ? argv[5] : false; 
		document.cookie = name + "=" + escape (value) + 
		((expires == null) ? "" : ("; expires=" + exp.toGMTString())) + 
		((path == null) ? "" : ("; path=" + path)) + 
		((domain == null) ? "" : ("; domain=" + domain)) + 
		((secure == true) ? "; secure" : ""); 
	}; 
	/** 
	* 读取Cookies 
	*/ 
	Cookies.get = function(name){ 
		var arg = name + "="; 
		var alen = arg.length; 
		var clen = document.cookie.length; 
		var i = 0; 
		var j = 0; 
		while(i < clen){ 
			j = i + alen; 
			if (document.cookie.substring(i, j) == arg) 
				return Cookies.getCookieVal(j); 
			i = document.cookie.indexOf(" ", i) + 1; 
			if(i == 0) 
				break; 
		} 
		return null; 
	}; 
	/** 
	* 清除Cookies 
	*/ 
	Cookies.clear = function(name) { 
		if(Cookies.get(name)){ 
		var expdate = new Date();  
		expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));  
		Cookies.set(name, "", expdate);  
	} 
}; 
	Cookies.getCookieVal = function(offset){ 
		var endstr = document.cookie.indexOf(";", offset); 
		if(endstr == -1){ 
			endstr = document.cookie.length; 
		} 
		return unescape(document.cookie.substring(offset, endstr)); 
	}; 

4 function.php

　　

参考：http://www.nowamagic.net/webdesign/webdesign_CookieInPhpJavascript.phpPHP与JavaScript下的Cookie操作