来自PHP的JavaScript（使用Ajax）和输出缓冲

我现在有一个来自PHP脚本的JSON格式的工作文件

下一步是使用JavaScript脚本检索这些数据以进行排序、过滤和显示

我有一个可以正常工作的Ajax脚本，可以测试回拉数据，但是我需要针对个人对其进行个性化设置

在PHP中，我有一个名为MID（成员ID）的会话变量

我正在尝试使用PHP构建JavaScript，其中包含唯一的URL，MID作为变量

除了用外部PHP脚本中的MID变量替换JavaScript文本中的midValue变量外，以下所有操作似乎都能正常工作

到目前为止，代码看起来像这样

    // This is a PHP file
    // Setup PHP Output Buffering to change the MID value
    session_start();
    $MID = $_SESSION['MID'];

    function callback($buffer)
    {
      return (str_replace("midValue", $MID, $buffer));
    }

    ob_start("callback");

/*

Some bits I can't show as I haven't figured out the correct Stackoverflow tags (!) ...

 - Add the usual HTML tags such as `HTML, HEAD, TITLE, BODY, SCRIPT` etc
 - Include a DIV with an ID of **json**, this will be replaced by the JSON output it
   self.
 - Enclose the params variable with the `CDATA` tags to maintain the ampersand.

*/
    params = "url=server.com/content.php?action=json&MID=" + midValue

    request = new ajaxRequest()
    request.open("POST", "getcontent.php", true)
    request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
    request.setRequestHeader("Content-length", params.length)
    request.setRequestHeader("Connection", "close")

    request.onreadystatechange = function()
    {
        if (this.readyState == 4)
        {
            if(this.status == 200)
            {
                if(this.responseText != null)
                {
                    document.getElementById('json').innerHTML = this.responseText
                }
                else alert("Ajax Error: No data recieved")
            }
            else alert("Ajax Error: " + this.statusText)
        }
    }

    request.send(params)

    function ajaxRequest()
    {
        try
        {
            var request = new XMLHttpRequest()
        }
        catch(e1)
        {
            try
            {
                request = new ActiveXObject("Msxml2.XMLHTTP")
            }
            catch(e2)
            {
                try
                {
                    request = new ActiveXObject("Microsoft.XMLHTTP")
                }
            catch(e3)
                {
                    request = false
                }
            }
    }
    return request
   }

/*
Add the closing `SCRIPT, BODY and HTML` tags here.
*/

    ob_end_flush();

       if(isset($_POST['url'])) {
            echo file_get_contents("http://" . SanitizeString($_POST['url']));
       }

       function SanitizeString($var) {
           $var = strip_tags($var);
           $var = htmlentities($var);
           return stripslashes($var);
       }

getcontent.php文件如下所示

    // This is a PHP file
    // Setup PHP Output Buffering to change the MID value
    session_start();
    $MID = $_SESSION['MID'];

    function callback($buffer)
    {
      return (str_replace("midValue", $MID, $buffer));
    }

    ob_start("callback");

/*

Some bits I can't show as I haven't figured out the correct Stackoverflow tags (!) ...

 - Add the usual HTML tags such as `HTML, HEAD, TITLE, BODY, SCRIPT` etc
 - Include a DIV with an ID of **json**, this will be replaced by the JSON output it
   self.
 - Enclose the params variable with the `CDATA` tags to maintain the ampersand.

*/
    params = "url=server.com/content.php?action=json&MID=" + midValue

    request = new ajaxRequest()
    request.open("POST", "getcontent.php", true)
    request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
    request.setRequestHeader("Content-length", params.length)
    request.setRequestHeader("Connection", "close")

    request.onreadystatechange = function()
    {
        if (this.readyState == 4)
        {
            if(this.status == 200)
            {
                if(this.responseText != null)
                {
                    document.getElementById('json').innerHTML = this.responseText
                }
                else alert("Ajax Error: No data recieved")
            }
            else alert("Ajax Error: " + this.statusText)
        }
    }

    request.send(params)

    function ajaxRequest()
    {
        try
        {
            var request = new XMLHttpRequest()
        }
        catch(e1)
        {
            try
            {
                request = new ActiveXObject("Msxml2.XMLHTTP")
            }
            catch(e2)
            {
                try
                {
                    request = new ActiveXObject("Microsoft.XMLHTTP")
                }
            catch(e3)
                {
                    request = false
                }
            }
    }
    return request
   }

/*
Add the closing `SCRIPT, BODY and HTML` tags here.
*/

    ob_end_flush();

       if(isset($_POST['url'])) {
            echo file_get_contents("http://" . SanitizeString($_POST['url']));
       }

       function SanitizeString($var) {
           $var = strip_tags($var);
           $var = htmlentities($var);
           return stripslashes($var);
       }

---

我认为像这样简单的事情对你来说应该很好

<?php

session_start();
$MID = $_SESSION['MID'];
?>

params = "url=server.com/content.php?action=json&MID=<?php echo $MID ?>"

request = new ajaxRequest()
request.open("POST", "getcontent.php", true)
request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
request.setRequestHeader("Content-length", params.length)
request.setRequestHeader("Connection", "close")

... // rest of javascript

<?php include 'footer.php'; // include footer code here ?>

params=“url=server.com/content.php？action=json&MID=”
请求=新的ajaxRequest（）
open（“POST”，“getcontent.php”，true）
request.setRequestHeader（“内容类型”，“应用程序/x-www-form-urlencoded”）
request.setRequestHeader（“内容长度”，参数长度）
setRequestHeader（“连接”、“关闭”）
... // javascript的其余部分

---

使用此方法，您只需在PHP之外输出javascript和html，因此不需要在标记中使用它。然后，您可以根据需要回显变量或包含页眉和页脚。

谢谢drew010，这确实解决了最初的问题。但就像经常发生的那样（尤其是像我这样没有经验的黑客），我直接遇到了另一个！将删除url中的符号及其后面的所有内容（在params变量中）。我以为CDATA标签解决了这个问题。看起来我需要对url编码做更多的研究。再次感谢。我把这一点修好了。我不得不用。。。myUrl=“server.com/content.php？action=json&mid=”就像你建议的那样，然后。。params=“url=”+encodeURIComponent（myUrl）