PHP – Download Image in SQLite3

June 1, 2020
PHP
download image in php

In this tutorial, we will create a Download Image In SQLite3 using PHP. This code will download the image file from the SQLite database when the user clicks the download button. The system uses href or Hypertext Referencing to direct the user to another page bound by id to download the image using header() function with a different set of parameters. This a free program; you can apply this to your system as your own.

We will be using SQLite that provides an interface for accessing the database. It includes class interfaces to the SQL commands. And also, it allows you to create SQL functions and aggregate using PHP.

Getting started:

First, you have to download & install XAMPP or any local server that runs PHP scripts. Here’s the link for the XAMPP server https://www.apachefriends.org/index.html.

And, this is the link for the bootstrap that I used for the layout design https://getbootstrap.com/.

Installing SQLite Browser

We will now then install the SQLite data viewer, here’s the link for the DB Browser for SQLite http://sqlitebrowser.org/.

Setting Up SQLite

First, we are going to enable SQLite 3 in our PHP.

  1. Open localhost server folder XAMPP, etc. and locate php.ini.
  2. Open php.ini and enable sqlite3 by removing the semicolon in the line.

download image in php

Save changes and Restart Server.

Creating the database connection

Open your any kind of text editor(notepad++, etc..). Then just copy/paste the code below then name it conn.php.

<?php
    $conn=new SQLite3('db/db_image') or die("Unable to open database!");
    $query="CREATE TABLE IF NOT EXISTS `image`(image_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, image_name TEXT, location TEXT)";
 
    $conn->exec($query);
?>

Creating The Interface

This is where we will create a simple form for our application. To create the forms simply copy and write it into you text editor, then save it as index.php.

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
    </head>
<body>
    <nav class="navbar navbar-default">
        <div class="container-fluid">
            <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
        </div>
    </nav>
    <div class="col-md-3"></div>
    <div class="col-md-6 well">
        <h3 class="text-primary">PHP - Download Image In SQLite3</h3>
        <hr style="border-top:1px dotted #ccc;"/>
        <div class="col-md-3">
            <form method="POST" action="upload.php" enctype="multipart/form-data">
                <div class="form-group">
                    <label>Uploade here</label>
                    <input type="file" name="image" required="required" class="form-control"/>
                </div>
                <center><button class="btn btn-primary" name="upload">Upload</button></center>
            </form>
        </div>
        <div class="col-md-9">
            <div class="table-responsive">
                <table class="table table-bordered">
                    <thead class="alert-info">
                        <tr>
                            <th>Image</th>
                            <th>Image Name</th>
                            <th>Location</th>
                            <th>Action</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php
                            require'conn.php';
 
                            $query=$conn->query("SELECT * FROM `image`") or die("Failed to fetch row!");
                            while($fetch=$query->fetchArray()){
                                echo"<tr><td><img src='".$fetch['location']."' heigth='70px' width='70px'></td><td>".$fetch['image_name']."</td><td>".$fetch['location']."</td><td><a href='download.php?image=".$fetch['location']."' >Download</a></td></tr>";
                            }
                        ?>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</body>	
</html>

Creating the Upload Function

This code contains the upload function of the application. This code will upload the image data to SQLite database. To do this just copy and write these block of codes as shown below inside the text editor, then save it as upload.php.

<?php
    require_once 'conn.php';
 
    if(ISSET($_POST['upload'])){
        $file_name = $_FILES['image']['name'];
        $file_temp = $_FILES['image']['tmp_name'];
 
        $exp = explode(".", $file_name);
        $ext = end($exp);
        $image = time().'.'.$ext;
        $ext_allowed = array("png", "gif", "jpeg", "jpg");
        $location = "uploads/".$image;
        if(in_array($ext, $ext_allowed)){
            if(move_uploaded_file($file_temp, $location)){
                $query="INSERT INTO `image` (image_name, location) VALUES('$image', '$location')";
 
                $conn->exec($query);
 
                echo "<script>alert('Image uploaded!')</script>";
                echo "<script>window.location='index.php'</script>";
            }
        }else{
            echo "<script>alert('Only image to upload!')</script>";
            echo "<script>window.location='index.php'</script>";
        }
    }
?>

Creating the Main Function

This code contains the main function of the application. This code will download the image file from SQLite database. To do this just copy and write these block of codes as shown below inside the text editor, then save it as download.php.

<?php
    if(ISSET($_REQUEST['image'])){
        $exp=explode("/", $_REQUEST['image']);
        $image=$exp[1];
 
        header("Cache-Control: public");
        header("Content-Description: File Transfer");
        header("Content-Disposition: attachment; filename=".basename($image));
        header("Content-Type: application/octet-stream;");
        header("Content-Transfer-Encoding: binary");
        readfile("uploads/".$image);
    }
?>
There you have it we successfully created a Download Image In SQLite3 using PHP. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!!!
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