How to Add Watermark in Image using PHP

Generally, a watermark in image is used as a logo or brand identification image. This watermark is generally transparent type. But our main target in this tutorial is to learn how to add a watermark image to another image using PHP.

Every digital picture published to the web can be copied by other users. To avoid copying and further commercial use, you can protect picture by adding Watermark in Image.

These days, you’re probably seeing more and more photos with watermarks on Facebook, Twitter, Pinterest, LinkedIn, Google+ and on the Internet in general.

There are some another benefits of put watermark on your image is that it will identify that particular image or photo is created or uploaded by you. In most of the website, logo is used as watermark and put on image.

Add Watermark in Image using PHP

For this all feature here in this post, we will show you how to add watermark to image using PHP.

Source Code

index.php

<?php
//index.php
$connect = new PDO("mysql:host=localhost;dbname=watermark", "root", "");
$message = '';
if(isset($_POST["upload"]))
{
  if(!empty($_FILES["select_image"]["name"]))
  { 
    $extension = pathinfo($_FILES["select_image"]["name"],PATHINFO_EXTENSION);
    
    $allow_extension = array('jpg','png','jpeg');
    $file_name = uniqid() . '.' . $extension;
    $upload_location = 'upload/' . $file_name;
    if(in_array($extension, $allow_extension))
    {
      $image_size = $_FILES["select_image"]["size"];
      if($image_size < 2 * 1024 * 1024)
      {
        if(move_uploaded_file($_FILES["select_image"]["tmp_name"], $upload_location))
        { 
          
          $watermark_image = imagecreatefrompng('round-logo.png');
          if($extension == 'jpg' || $extension == 'jpeg')
          {
            $image = imagecreatefromjpeg($upload_location);
          }

          if($extension == 'png')
          {
            $image = imagecreatefrompng($upload_location);
          }

          $margin_right = 10; 
          $margin_bottom = 10;

          $watermark_image_width = imagesx($watermark_image); 
          $watermark_image_height = imagesy($watermark_image);  

          imagecopy($image, $watermark_image, imagesx($image) - $watermark_image_width - $margin_right, imagesy($image) - $watermark_image_height - $margin_bottom, 0, 0, $watermark_image_width, $watermark_image_height); 

          imagepng($image, $upload_location); 

          imagedestroy($image);
          if(file_exists($upload_location))
          { 
            $message = "Image Uploaded with Watermark";
            $data = array(
              ':image_name'   =>  $file_name
            );
            $query = "
            INSERT INTO images_table 
            (image_name, upload_datetime) 
            VALUES (:image_name, now())
            ";
            $statement = $connect->prepare($query);
            $statement->execute($data);
          }
          else
          { 
            $message = "There is some error, try again";
          }
        }
        else
        {
          $message = "There is some error, try again";
        }
      }
      else
      {
        $message = "Selected Image Size is very big";
      }      
    }
    else
    {
      $message = 'Only .jpg, .png and .jpeg image file allowed to upload';
    }
  }
  else
  { 
    $message = 'Please select Image';
  } 
}

$query = "
SELECT * FROM images_table 
ORDER BY image_id DESC
";

$statement = $connect->prepare($query);
$statement->execute();
$result = $statement->fetchAll();
?>

<!DOCTYPE html>
<html>
  <head>
    <title>How to Dynamically Add Watermark to Image using PHP</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
  </head>
  <body>
    <br />
    <div class="container">
      <h3 align="center">How to Dynamically Add Watermark to Image using PHP</h3>
      <br />
      <?php
      if($message != '')
      {
        echo '
        <div class="alert alert-info">
        '.$message.'
        </div>
        ';
      }
      ?>
      <div class="panel panel-default">
        <div class="panel-heading">Add Wartermark to an Image</div>
        <div class="panel-body">
          <form method="post" enctype="multipart/form-data">
            <div class="row">
              <div class="form-group">
                <label class="col-md-6" align="right">Select Image</label>
                <div class="col-md-6">
                  <input type="file" name="select_image" />
                </div>
              </div>              
            </div>
            <br />
            <div class="form-group" align="center">
              <input type="submit" name="upload" class="btn btn-primary" value="Upload" />
            </div>
          </form>
        </div>
      </div>
      <div class="panel panel-default">
        <div class="panel-heading">Uploaded Image with Watermark</div>
        <div class="panel-body" style="height: 700px;overflow-y: auto;">
          <div class="row">
          <?php
          foreach($result as $row)
          {
            echo '
            <div class="col-md-2" style="margin-bottom:16px;">
              <img src="upload/'.$row["image_name"].'" class="img-responsive img-thumbnail"  />
            </div>
            ';
          }
          ?>
          </div>
        </div>
      </div>
    </div>
  </body>
</html>

Database

-- Database: `watermark`
-- Table structure for table `images_table`

CREATE TABLE `images_table` (
  `image_id` int(11) NOT NULL,
  `image_name` varchar(250) NOT NULL,
  `upload_datetime` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

-- Indexes for dumped tables
-- Indexes for table `images_table`

ALTER TABLE `images_table`
  ADD PRIMARY KEY (`image_id`);

-- AUTO_INCREMENT for dumped tables
-- AUTO_INCREMENT for table `images_table`

ALTER TABLE `images_table`
  MODIFY `image_id` int(11) NOT NULL AUTO_INCREMENT;

With the help of above source code, you can make one functionality like you can upload an image with watermark and save one server by using PHP. When you have upload image then it will automatically add watermark on image using PHP. You can also change the position of watermark image by change the value of margin offset, you can add watermark on an image at any position. By using this tutorial, you can also add text as watermark to image using PHP

5 Advantages of using Watermarking

Base Image watermark module is one perfect solution to protect your image. There are several benefits of using this watermarking in Odoo. Let’s have a quick look.