如何根据登录人的身份更改图片

Question

我需要帮助您了解如何在用户登录后更改图片。'因为我正在创建一个在线广播电台，我希望我的听众能够查看DJ的当前在线状态，基于该图像的空气。该图像存储在一个php页面（djonair.php）中，该页面内的图像（djonair.php）将在用户登录后更改，然后使用iframe在主页面（index.html）中调用该页面。我使用iframe来调用该页面，因为我的主页是一个HTML页面（index.html）。

，这里是我的login.php代码：

<? 
    session_start(); 
    if(session_is_registered(myusername)){ 
    header("location:djmain.php"); 
    } 
    ?> 

    <font face="calibri" color="white" size="6">: DJ Log In :</font><br> 
    <table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC"> 
    <tr> 
    <form name="form1" method="post" action="checklogin.php"> 
    <td> 
    <table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#005180"> 
    <tr> 
    <td colspan="3"><strong>Member Login </strong></td> 
    </tr> 
    <tr> 
    <td width="78">Username</td> 
    <td width="6">:</td> 
    <td width="294"><input name="myusername" type="text" id="myusername"></td> 
    </tr> 
    <tr> 
    <td>Password</td> 
    <td>:</td> 
    <td><input name="mypassword" type="password" id="mypassword"></td> 
    </tr> 
    <tr> 
    <td>&nbsp;</td> 
    <td>&nbsp;</td> 
    <td><input type="submit" name="Submit" value="Login"></td> 
    </tr> 
    </table> 
    </td> 
    </form> 
    </tr> 
    </table> 

这里是我的checklogin.php代码：

<?php 
    $host="sqlhostname"; // Host name 
    $username="sqlusername"; // Mysql username 
    $password="sqkpassword"; // Mysql password 
    $db_name="dbname"; // Database name 
    $tbl_name="tablename"; // Table name 

    // Connect to server and select databse. 
    mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
    mysql_select_db("$db_name")or die("cannot select DB"); 

    // username and password sent from form 
    $myusername=$_POST['myusername']; 
    $mypassword=$_POST['mypassword']; 

    // To protect MySQL injection 
    $myusername = stripslashes($myusername); 
    $mypassword = stripslashes($mypassword); 
    $myusername = mysql_real_escape_string($myusername); 
    $mypassword = mysql_real_escape_string($mypassword); 

    $sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'"; 
    $result=mysql_query($sql); 

    // Mysql_num_row is counting table row 
    $count=mysql_num_rows($result); 
    // If result matched $myusername and $mypassword, table row must be 1 row 

    if($count==1){ 
    // Register $myusername, $mypassword and redirect to file "login_success.php" 
    session_register("myusername"); 
    session_register("mypassword"); 
    header("location:djmain.php"); 
    } 
    else { 
    echo "Wrong Username or Password"; 
    echo '<br>Go back to <a href="login.php">log-in</a> page.'; 
    } 
    ?> 

Answer 1

改变一些记录在数据库中，你的DJ存储与图像的URL，然后选择它每次用户访问页面，所以他/她可以让她在空中。例如

$q = "UPDATE statistics SET on_Air_image_url = '".mysql_real_Escape_string($_SESSION['djname']).".png'";