会话变量从while循环发送特定变量

Question

I have this simple while loop which retrieves data from a mysql query and displays several links on my homepage.

I would like to avoid using the php get function and add query strings to my urls

I am thinking of using session variables but I need help and I'm pretty sure this can't be done.

When a visitor clicks a link from the several ones displayed by the while loop, that particular variable would be set in a session.

In my code, the session will always send the last var.

Can this be done?

    <? session_start(); // Start Session Variables

    $result = mysql_query("my query");

    while($slice = mysql_fetch_assoc($result)){
        $url = $slice['url'];
        $name  = $slice['name']; ?>

        <a href="<? echo $url; ?>"><? echo $name; ?></a>

    <? } 

    $_SESSION['name'] = $name; // Store session data  ?>

Answer 1

What you wish to do can be done by using a javascript function which will make an AJAX request sending the clicked name to the server. The server side code will then store the required session variable

 <? 
     session_start(); // Start Session Variables

    $result = mysql_query("my query");
    $name = '';
    while($slice = mysql_fetch_assoc($result)){
        $url = $slice['url'];
        $name  = $slice['name']; ?>

        <a href="<? echo $url; ?>" onclick='setSession(<? echo $url;?>);'><? echo $name; ?></a>

    <? } 

Now the setSession will make an AJAX call passing the value obtained. This can be then saved as session url by a simple server side code

The javascript code to present on the same page as your page having links

<script type='text/javascript'>
    function getXMLHTTPRequest() {
    try {
    req = new XMLHttpRequest();
    } catch(err1) {
      try {
      req = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (err2) {
        try {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (err3) {
          req = false;
        }
      }
    }
    return req;
    }



      var http = getXMLHTTPRequest();
       function setSession(value) {
    var myurl = "session.php";  // to be present in the same folder
     var myurl1 = myurl;
      myRand = parseInt(Math.random()*999999999999999);
      var modurl = myurl1+"?rand="+myRand+"url"+value ; // this will set the url to be sent

      http.open("GET", modurl, true);
      http.onreadystatechange = useHttpResponse;
      http.send(null);
    }


    function useHttpResponse() {
       if (http.readyState == 4) {
        if(http.status == 200) {
          var mytext = http.responseText;
          // I dont think u will like to do any thing with the response
          // u can redirect the user to the req page (link clicked), once the session url has been setted
            }
         }
         else {
             // don't do anything until any result is obtained
            }
        } 
</script>

PHP server side code to be present to set the required url as session value

<?php
session_start();
if($_SESSION['url']!=""){
unset($_SESSION['url']);   
$_SESSION['url'] = $_REQUEST['url'];  
}
else {
$_SESSION['url'] = $_REQUEST['url'];  
}
?>