PHP与Javascript的两种交互方式

2007-12-29

    在网页制作过程中怎样在不刷新页面的情况下使前台页面和
后台CGI页面保持交互一直是个问题。这里介绍两个我在实践中使
用的方法。

    方法一：通过Cookie交互。一共是三个文件，分别为：
index.htm，action.php，main.htm
      原理为前台页面main.htm和后台action.php通过页面框架
index.htm组织起来，将action.php的页面宽度设为0，这样并不
影响显示。action.php将信息放入cookie中，main.htm通过读取
cookie来实现交互。在main.htm中也可以通过重新读取action.php
来实现控制后台CGI程序。

index.htm
---------------------------------------------------------------
<html>
<head>
<title>Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>

<frameset framespacing="0" border="false" frameborder="0" cols="0，*">
  <frame name="leftFrame" scrolling="no" noresize src="action.php">
  <frame name="rightFrame" scrolling="auto" src="main.htm">
</frameset><noframes>
  <body bgcolor="#FFFFFF">
  <p>本页使用页面框架，但是您的浏览器不支持。</p>
  </body>
</noframes>
</html>
---------------------------------------------------------------

action.php
---------------------------------------------------------------
<?
srand((double)microtime()*1000000);
$result=rand(0，100);
setcookie("action"，$result，time()+900，"/");
?>
---------------------------------------------------------------

main.htm
---------------------------------------------------------------
<html>
<head>
<title>Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="javascript">
function get_cookie()
{
  document.test.current_cookie.value=document.cookie;
}
</script>
</head>
<body bgcolor="#FFFFFF">
<form name="test" >
当前参数为<input type="text" name="current_cookie" size="80" maxlength="1000">
</form>
<script language="javascript">
  setInterval("get_cookie()"，200);
</script>
<br>
<a href="action.php?sid=9187847ffd2d82e855527ea780a10b89" target="leftFrame">重新读取Cookie</a>
</body>
</html>
---------------------------------------------------------------

    方法二：直接通过parent.*.*来实现交互。一共是三个文件，分别为：
index.htm，action.php，main.htm，其中index.htm和前面的一样。
    原理为通过parent.rightFrame.test.current_cookie.value直接传递
信息。

action.php
---------------------------------------------------------------
<?
srand((double)microtime()*1000000);
$result=rand(0，100);
?>
<script language="javascript">
  parent.rightFrame.test.current_cookie.value="<? echo $result?>";
</script>
---------------------------------------------------------------

main.htm
---------------------------------------------------------------
<html>
<head>
<title>Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF">
<form name="test" >
当前参数为<input type="text" name="current_cookie" size="80" maxlength="1000">
</form>
<br>
<a href="action.php?sid=9187847ffd2d82e855527ea780a10b89" target="leftFrame">重新读取Cookie</a>
</body>
</html>
---------------------------------------------------------------

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