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电梯直达

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发表于 2010-03-23 14:11 |只看该作者 |倒序浏览

最近开发大量采用了EXT.JS和PHP,所以这两种语言之间的交互非常多.cookie是最适合他们交互的方式.

下面的例子列出4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

1 setcookie.php

<?php //上面不能有空行
setcookie('php_cn_ck','php_中文_cookie');
setcookie('php_en_ck','php_english_cookie');
?>
<script src="cookie.js"></script>
<script>
set_cookie('js_cn_ck','js_中文_cookie');
set_cookie('js_en_ck','js_english_cookie');
</script>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf8">
PHP cookie已经设置 php_cn_ck=php_中文_cookie php_en_ck=php_english_cookie 
JS cookie已经设置 js_cn_ck=js_中文_cookie js_en_ck=js_english_cookie 
<a href=getcookie.php>读取cookie</a> 
</html>

2 getcookie.php

<meta http-equiv="Content-Type" content="text/html; charset=utf8">
一读取php传送的中英文cookie 
1 php读取php设置php cookie 
<?php
include('function.php');
$php_cn_ck=$_COOKIE['php_cn_ck'];
$un_php_cn_ck=unescape($php_cn_ck);
echo "解码前的中文cookie:php_cn_ck=$php_cn_ck ";
echo "解码后的中文cookie:un_php_cn_ck=$un_php_cn_ck ";
$php_en_ck=$_COOKIE['php_en_ck'];
echo "英文cookie无需解码:php_en_ck=$php_en_ck ";
?>
2 js读取php设置cookie 
<script src="cookie.js"></script>
<script>
php_cn_ck=get_cookie('php_cn_ck');
un_php_cn_ck = decodeURIComponent (escape(php_cn_ck));
document.write("解码前的中文cookie :php_cn_ck="+php_cn_ck+" ");
document.write("解码后的中文cookie :un_php_cn_ck="+un_php_cn_ck+" ");
php_en_ck=get_cookie('php_en_ck');
document.write("英文cookie无需解码 :php_en_ck="+php_en_ck+" ");
</script>
----------------------------------------------- 
二读取JS传送的中英文cookie 
1 php读取JS设置js cookie 
<?php
$js_cn_ck=$_COOKIE['js_cn_ck'];
$un_js_cn_ck=unescape($js_cn_ck);
echo "解码前的中文cookie:js_cn_ck=$js_cn_ck ";
echo "解码后的中文cookie:un_js_cn_ck=$un_js_cn_ck ";
$js_en_ck=$_COOKIE['js_en_ck'];
echo "英文cookie无需解码:js_en_ck=$js_en_ck ";
?>

2 js读取js设置的cookie 
<script>
js_cn_ck=get_cookie('js_cn_ck');
document.write("解码前的中文cookie :js_cn_ck="+js_cn_ck+" ");
//un_js_cn_ck = decodeURIComponent (escape(js_cn_ck)); 调用这两句会出现js解析中断
//document.write("解码后的中文cookie :un_js_cn_ck="+un_js_cn_ck+" ");
js_en_ck=get_cookie('js_en_ck');
document.write("英文cookie无需解码 :js_en_ck="+js_en_ck+" ");
</script>
<pre>
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
</pre>

文件中的函数包文件如下

3 cookie.js

function set_cookie(name, value, expires, path, domain, secure)
{
// set time, it's in milliseconds
var today = new Date();
today.setTime( today.getTime() );

if ( expires )
{
expires = expires * 1000 * 60 * 60 * 24;
}
var expires_date = new Date( today.getTime() + (expires) );

document.cookie = name + "=" +escape( value ) +
( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
( ( path ) ? ";path=" + path : "" ) +
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}
/*
* This will retrieve the cookie by name, if the cookie does not exist, it will return false, so you can do things like
* if ( Get_Cookie( 'your_cookie' ) ) do something.
*/
function get_cookie(name) {
var start = document.cookie.indexOf(name + "=");
var len = start + name.length + 1;
if ((!start) && (name != document.cookie.substring(0, name.length )))
{
 return null;
}
if (start == -1) return null;
var end = document.cookie.indexOf(";", len);
if (end == -1) end = document.cookie.length;
return unescape(document.cookie.substring(len, end));
}

4 function.php

function unescape($str) {
$str = rawurldecode ( $str );
preg_match_all ( "/(?:%u.{4})|&#x.{4};|&#d+;|.+/U", $str, $r );
$ar = $r [0];
foreach ( $ar as $k => $v ) {
 if (substr ( $v, 0, 2 ) == "%u") {
if (! eregi ( "WIN", PHP_OS )) {
$tmpString = "%u" . substr ( $v, 4, 2 ) . substr ( $v, 2, 2 );
}
$ar [$k] = iconv ( "UCS-2", "utf-8", pack ( "H4", substr ( $tmpString, - 4 ) ) );
 } elseif (substr ( $v, 0, 3 ) == "&#x")
$ar [$k] = iconv ( "UCS-2", "utf-8", pack ( "H4", substr ( $v, 3, - 1 ) ) );
 elseif (substr ( $v, 0, 2 ) == "&#") {
$ar [$k] = iconv ( "UCS-2", "utf-8", pack ( "n", substr ( $v, 2, - 1 ) ) );
 }
}
return join ( "", $ar );
}