如何使用数据库从文件夹中检索图像？

如何使用数据库中的文件名来检索服务器上文件夹中的相应文件？

目前，我有一个正在运行的评论部分，但不确定如何检索与该评论相对应的图像。

我的数据库：评论

结构：cid A_I主要uid varchar（128）日期datetime消息文本iamges varchar（50）

HTML：

<?php 
echo "<form method='POST' enctype='multipart/form-data' action='".setComments($conn)."'><br>

        <input type='hidden' name='uid' value='Anonymous'>
        <input type='hidden' name='date' value='".date('Y-m-d H:i:s')."'>

        Select a file:<br><input type='file' name='image' id='image'><br<br><br>
        Comment:<br> <textarea name='message'></textarea><br><br>
        <button type='submit' name='commentSubmit'>Upload</button><br><br><br>

</form>";
getComments($conn); 
?>

职能：

<?php

function setComments($conn) {
    if (isset ($_POST['commentSubmit'])) {
        $uid = $_POST['uid'];
        $date = $_POST['date'];
        $message = $_POST['message'];
        $file_name = $_FILES['image']['name'];

        $sql = "INSERT INTO comments (uid, date, message, images) values ('$uid','$date','$message','$file_name')";
        $result = mysqli_query($conn, $sql);
    }
}       
        if(isset($_FILES['image'])){
            $errors= array();
            $file_name = $_FILES['image']['name'];
            $file_size = $_FILES['image']['size'];
            $file_tmp = $_FILES['image']['tmp_name'];
            $file_type = $_FILES['image']['type'];
            $tmp = explode('.', $file_name);
            $file_ext =  end($tmp);

            $expensions= array("jpeg","jpg","png"."gif");

            if(in_array($file_ext,$expensions)=== false){
             $errors[]="extension not allowed, please choose a JPEG, GIF, or PNG file.";
            }

            if($file_size > 2097152) {
             $errors[]='File size must be excately 2 MB';
            }

            if(empty($errors)==true) {
                move_uploaded_file($file_tmp,"uploads/".$file_name);
                echo "Successfully uploaded file!";

            }else{
                print_r($errors);
    }

}
function getComments($conn) {    

    $sql = "SELECT * FROM comments ORDER BY date DESC LIMIT 10";
    $result = mysqli_query($conn, $sql);
    while ($row = $result->fetch_assoc()) {
        echo $row['uid']."<br>";
        echo $row['date']."<br><br>";
        echo $row['message']."<br><br>";
    }
}