dbConfig.php

<?php
// Database configuration
$dbHost     = "localhost";
$dbUsername = "root";
$dbPassword = "";
$dbName     = "photo";

// Create database connection
$db = new mysqli($dbHost, $dbUsername, $dbPassword, $dbName);

// Check connection
if ($db->connect_error) {
    die("Connection failed: " . $db->connect_error);
}
?>




<form action="" method="post" enctype="multipart/form-data">
    Select Image Files to Upload:
    <input type="file" name="files[]" multiple >
    <input type="submit" name="submit" value="UPLOAD">
</form>





<?php
if(isset($_POST['submit'])){
    // Include the database configuration file
    include_once 'dbConfig.php';
    
    // File upload configuration
    $targetDir = "uploads/";
    $allowTypes = array('jpg','png','jpeg','gif');
    
    $statusMsg = $errorMsg = $insertValuesSQL = $errorUpload = $errorUploadType = '';
    if(!empty(array_filter($_FILES['files']['name']))){
        foreach($_FILES['files']['name'] as $key=>$val){
            // File upload path
            $fileName = basename($_FILES['files']['name'][$key]);
            $targetFilePath = $targetDir . $fileName;
            
            // Check whether file type is valid
            $fileType = pathinfo($targetFilePath,PATHINFO_EXTENSION);
            if(in_array($fileType, $allowTypes)){
                // Upload file to server
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$key], $targetFilePath)){
                    // Image db insert sql
                    $insertValuesSQL .= "('".$fileName."', NOW()),";
                }else{
                    $errorUpload .= $_FILES['files']['name'][$key].', ';
                }
            }else{
                $errorUploadType .= $_FILES['files']['name'][$key].', ';
            }
        }
        
        if(!empty($insertValuesSQL)){
            $insertValuesSQL = trim($insertValuesSQL,',');
            // Insert image file name into database
            $insert = $db->query("INSERT INTO images (file_name, uploaded_on) VALUES $insertValuesSQL");
            if($insert){
                $errorUpload = !empty($errorUpload)?'Upload Error: '.$errorUpload:'';
                $errorUploadType = !empty($errorUploadType)?'File Type Error: '.$errorUploadType:'';
                $errorMsg = !empty($errorUpload)?'<br/>'.$errorUpload.'<br/>'.$errorUploadType:'<br/>'.$errorUploadType;
                $statusMsg = "Files are uploaded successfully.".$errorMsg;
            }else{
                $statusMsg = "Sorry, there was an error uploading your file.";
            }
        }
    }else{
        $statusMsg = 'Please select a file to upload.';
    }
    
    // Display status message
    echo $statusMsg;
}
?>





<?php
// Include the database configuration file
include_once 'dbConfig.php';

// Get images from the database
$query = $db->query("SELECT * FROM images ORDER BY id DESC");

if($query->num_rows > 0){
    while($row = $query->fetch_assoc()){
        $imageURL = 'uploads/'.$row["file_name"];
?>
    <img src="<?php echo $imageURL; ?>" alt="" />
<?php }
}else{ ?>
    <p>No image(s) found...</p>
<?php } ?>