如何在 PHP 中使用 user_name 获取用户的个人资料图片？

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我开发了一个用户个人资料，他可以在第一次登录时上传他的照片。 他的个人资料图片保存到文件夹中，图像路径保存在数据库中。 现在我想使用他的用户名来获取该图像，我已使其独一无二。 当用户保存他的个人资料图片时，通过隐藏的提交按钮，我将他的用户名保存在数据库中。
但是这个获取图像的代码不起作用

我尝试过的：

这是我完全的欢迎。 php 文件，用户在其中更改他的个人资料图片并查看他的个人资料详细信息。

<?php include('config.php');?>
<?php
    // index.php
    session_start();
    if(!isset($_SESSION['username']))

     {
        header("Location: login.php");
        exit();
    }
    $username = $_SESSION['username'];
    $sql = "SELECT *  FROM services WHERE user_name = '".$_SESSION['username']."'";
    $result = $con->query($sql);

    if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        ?>
 <!-- Save username and profile picture-->   

<link rel="stylesheet" type="text/css" href="css/welcome_php.css">
<?php include('header.php');?>

<div class="container">
    <div class="row">
        <div class="col-md-7 ">
            <div class="panel panel-default">
                <div class="panel-heading">
                  <a style="float: right" href="logout.php">class="fa fa-sign-out">  Logout</a>
                 <center> <h4 >User Profile</h4></center>

               </div>
                    <div class="panel-body">

                        <div class="box box-info">

                            <div class="box-body">
                                <div class="col-sm-6">
                                    
                                        <form method="post" action="ajaxupload.php" enctype="multipart/form-data">
                                          <h5 style="color:#a66a6a;">Set your profile picture</h5>
                                          <input type="file" name="Filename"> 
                                          <input type="hidden" name="Description"  value="<?php echo $row ['user_name']; ?>" />
                                          <br/>
                                          <input TYPE="submit" name="upload" value="Submit" class="btn1" />
                                        </form>

   
                                    

              
                                </div>
                                

            <div class="col-sm-6">
            <h4 style="color:#a66a6a;"><?php echo $row ['name']; ?></h4></span>
              <span><p><?php echo $row ['service']; ?></p></span>            
            </div>
            <div class="clearfix"></div>
            <hr style="margin:5px 0 5px 0;">
  
              
<div class="col-sm-5 col-xs-6 tital " >Name</div><div class="col-sm-7 col-xs-6 "><?php echo $row ['name']; ?></div>
     <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >User Name</div><div class="col-sm-7"> <?php echo $row ['user_name']; ?></div>
  <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >Password</div><div class="col-sm-7"> <?php echo $row ['password']; ?></div>
  <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >email</div><div class="col-sm-7"><?php echo $row ['email']; ?></div>

  <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >District</div><div class="col-sm-7"><?php echo $row ['district']; ?></div>

  <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >City</div><div class="col-sm-7"><?php echo $row ['city']; ?></div>

 <div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >Address</div><div class="col-sm-7"><?php echo $row ['address']; ?></div>

<div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >Service</div><div class="col-sm-7"><?php echo $row ['service']; ?></div>
<div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >Years</div><div class="col-sm-7"><?php echo $row ['years']; ?></div>
<div class="clearfix"></div>
<div class="bot-border"></div>

<div class="col-sm-5 col-xs-6 tital " >Details</div><div class="col-sm-7"><?php echo $row ['details']; ?></div>

<center><a href="update_userinfo.php" class="btn" role="button">Update</a></center>


<?php
        }
        }
        ?>

<?php

 $sql="SELECT image_path FROM images where user_name = '".$_SESSION['username']."'";
 
      $result = $con->query($sql);

      $file_name=$row['file_name'];
      $image_path=$row['image_path'];//here you get path where you store image for user1

    ?>    
          
  <img src=<?php echo"$image_path";?> width=500 height=400> <br>

这是ajax上传文件，将图像保存在ddatabse中

<?php
	$fileExistsFlag = 0; 
	$fileName = $_FILES['Filename']['name'];
	$link = mysqli_connect("localhost","root","","construction") or die("Error ".mysqli_error($link));
	/* 
	*	Checking whether the file already exists in the destination folder 
	*/
	$query = "SELECT file_name FROM images WHERE file_name='$fileName'";	
	$result = $link->query($query) or die("Error : ".mysqli_error($link));
	while($row = mysqli_fetch_array($result)) {
		if($row['filename'] == $fileName) {
			$fileExistsFlag = 1;
		}		
	}
	/*
	* 	If file is not present in the destination folder
	*/
	if($fileExistsFlag == 0) { 
		$target = "uploads/";		
		$fileTarget = $target.$fileName;	
		$tempFileName = $_FILES["Filename"]["tmp_name"];
		$fileDescription = $_POST['Description'];	
		$result = move_uploaded_file($tempFileName,$fileTarget);
		/*
		*	If file was successfully uploaded in the destination folder
		*/
		if($result) { 
			echo "Your file <html>".$fileName."</html> has been successfully uploaded";		
			$query = "INSERT INTO images(image_path,file_name,user_name) VALUES ('$fileTarget','$fileName','$fileDescription')";
			$link->query($query) or die("Error : ".mysqli_error($link));			
		}
		else {			
			echo "Sorry !!! There was an error in uploading your file";			
		}
		mysqli_close($link);
	}
	/*
	* 	If file is already present in the destination folder
	*/
	else {
		echo "File <html>".$fileName."</html> already exists in your folder. Please rename the file and try again.";
		mysqli_close($link);
	}	
?>

解决方案1

除了我关于不显示任何包含以下代码的评论之外 img_src 多变的。

HTML 属性值应该加引号（浏览器通常也接受不带引号的属性值，但它不是有效的 HTML），并且如果它们包含空格或保留字符，则必须加引号：

PHP
<?php echo '<img src="' . $image_path . '" width="500" height="400">'; ?>

[EDIT]

此代码似乎是复制并粘贴在一起的，并且不会按预期工作：

PHP
$sql="SELECT image_path FROM images where user_name = '".$_SESSION['username']."'";

// Executing the query and assigning to $result
// OK so far but it misses checking for errors
$result = $con->query($sql);

// What is $row?
// The query result has been stored in $result!
// There is probably something missing like
//$row = $result->fetch_row(); 
// Finally, the above SQL query returns only one field: image_path
// So 'file_name' will never be present
$file_name=$row['file_name'];
$image_path=$row['image_path'];//here you get path where you store image for user1

如果上述问题已修复以从数据库返回路径（如果没有，则打印一些反馈），则该路径可用于 img 标签，前提是文件存在并且是相对于 Web 服务器文档根（以“https://www.codeproject.com/”开头）或相对于当前页面的路径。
[/EDIT]

解决方案2

非常感谢您的帮助@Jochen。 考虑到您的评论后，我编写了如下代码

我

<?php

 $sql="SELECT * FROM images where user_name = '".$_SESSION['username']."'";
 $result = $con->query($sql);

    if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        ?>
      
      <?php echo '<img src="' . $row['image_path']. '" width="500" height="400">'; ?>

    
   <?php
        }
        }
        ?>

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