无法在聊天应用中为管理员和简单用户显示特定图片

问题描述：

Trying to display a different pic for the logged in user if it's an admin or a simple user. Here is my function

function isAdminPhotoChange() {
    // check if user is admin or user
    if (isset($_SESSION['user']) && $_SESSION['user']['user_type'] == 'admin') {
        if (file_exists("images/metcircle13.png")) {
            $filename = "$metcircle13.png";
            echo '<img src="images/<?php echo'. $filename.'?>" style="height: 50px;">';
        } else {
            if (isset($_SESSION['user']) && $_SESSION['user']['user_type'] == 'user') {
                $filename = "user_profile.jpg";
                echo '<img src="images/<?php echo'. $filename.'?>" style="height: 50px;">';
            }
        }
    }
}

And here is the call in another php file

<?php
include("functions.php");

$comm = mysqli_query($db, "select name,comment,post_time from comments");
while($row=mysqli_fetch_array($comm)){

    $name=$row['name'];
    $comment=$row['comment'];
    $time=$row['post_time'];
}

?>
<div class="sxolion">
<strong style="margin: 3px; color: #000; text-shadow: 2px 2px 5px #3d5c5c;"><?php isAdminPhotoChange(); ?><br><p style="margin: 4px;"><?=$name?></p></strong><p style="margin: 3px;"><?=$comment?></p><span class="time"><br><p style="margin: 4px;"><?=date("j/m/Y g:i:sa", strtotime($time))?></p></span>

Thank You!

如果是管理员或简单用户，请尝试为登录用户显示不同的图片。这是我的函数 p>

  function isAdminPhotoChange（）{
 //检查用户是admin还是user 
 if（isset（$ _ SESSION ['user']）＆amp;  ＆amp; $ _SESSION ['user'] ['user_type'] =='admin'）{
 if（file_exists（“images / metcircle13.png”））{
 $ filename =“$ metcircle13.png”; \  n echo'＆lt; img src =“images /＆lt;？php echo'。$ filename。'？＆gt;”  style =“height：50px;”＆gt;'; 
} else {
 if（isset（$ _ SESSION ['user']）＆amp;＆amp; $ _SESSION ['user'] ['user_type'] =='  user'）{
 $ filename =“user_profile.jpg”; 
 echo'＆lt; img src =“images /＆lt;？php echo'。$ filename。'？＆gt;”  style =“height：50px;”＆gt;'; 
} 
} 
} 
} 
  code>  pre> 
 
 这是另一个php文件中的调用  p> 
 
 
 ＆lt;？php 
include（“functions.php”）; 
 
 $ comm = mysqli_query（$ db，“select name，comment，post_time from comments”  ）; 
while（$ row = mysqli_fetch_array（$ comm））{
 
 $ name = $ row ['name']; 
 $ comment = $ row ['comment']; 
 $ time = $ row  ['post_time']; 
} 
 
？＆gt; 
＆lt; div class =“sxolion”＆gt; 
＆lt; strong style =“margin：3px; color：＃000; text-shadow：2px 2px 5px  ＃3d5c5c;“＆gt;＆lt;？php isAdminPhotoChange（）;  ？＆gt;＆lt; br＆gt;＆lt; p style =“margin：4px;”＆gt;＆lt;？= $ name？＆gt;＆lt; / p＆gt;＆lt; / strong＆gt;＆lt; p style =“margin：3px;”  ＆gt;＆lt;？= $ comment？＆gt;＆lt; / p＆gt;＆lt; span class =“time”＆gt;＆lt; br＆gt;＆lt; p style =“margin：4px;”＆gt;＆lt;？= date（“  j / m / Y g：i：sa“，strtotime（$ time））？＆gt;＆lt; / p＆gt;＆lt; / span＆gt; 
  code>  pre> 
 
    p> 
 
 
谢谢！ p> 
  div>

答

In the nicest way possible, there was an awful lot of logic/syntax errors in your isAdminPhotoChange() function that have been mentioned in the comments, and some more - though none that would of thrown an error.

Here's my attempt at fixing just that function, as the rest appears OK:

function isAdminPhotoChange()
{
    // ENSURE SESSION HAS STARTED
    if(session_status() === PHP_SESSION_NONE)
    {
        session_start();
    }

    $admin_img = "images/metcircle13.png";
    $user_img = "images/user_profile.jpg";

    // IS ADMIN
    if (isset($_SESSION['user']) && $_SESSION['user']['user_type'] == 'admin' && file_exists($admin_img))
    {
        echo '<img src="'.$admin_img.'" style="height: 50px;">';
    }
    // IS USER
    else if (isset($_SESSION['user']) && $_SESSION['user']['user_type'] == 'user' && file_exists($user_img))
    {
        echo '<img src="'.$user_img.'" style="height: 50px;">';
    }
}

无法在聊天应用中为管理员和简单用户显示特定图片

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