Php adding watermark to image

How To Add Watermark in Images Using PHP – Source Code

Hello programmers in this PHP Tutorial I’m gonna show you how to add watermark to image using PHP. I will create a PHP file which will process two images, One image will be our main image and another one is our watermark image. I will create a PHP file which will take these two images and the watermark image will be placed on the main image.

You might also be inteested in How To Add text to image in PHP

Generally, a watermark 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.

How to add watermark to image using PHP with Explanation

Adding watermark to images in PHP is not a hard task to do. what you need to know is some PHP function to work with images. Those functions are –

imagecreatefrompng() PHP function

imagesx() and imagesy() PHP function

imagecreatetruecolor() PHP function

imagecreatefromjpeg() PHP function

getimagesize() PHP function

imagecopymerge() PHP function

You just need to have some basic knowledge of these functions and some basic idea on what these functions do.

PHP code to add watermark to any image

The below code will process two images and display the newly created watermarked image from those two images on your browser while running this code.

Code Explanation Line By Line of Adding Watermark to images in PHP

Just save the above PHP code as a PHP file and in the directory suppose I have two image files. One is image.jpg which is our main image. And another one is watermark.png .

The watermark.png file is going to be used as a watermark here on the image image.jpg .

So what I am going to do is simply took our main image and then will put watermark.png image on that main image.

So before going to explain how we can do this, I would like to tell you what is the purpose of those above functions listed and used in this PHP code.

header('Content-type: image/jpeg')

This is our Content-type of this PHP file. Many of us do not use this content type if he or she is intending to use HTML content type for the page. Because by default PHP mark this file as HTML page type.

But here we want that, when I will run my PHP file I wish that I will get my watermarked image on my browser page. That’s why I have set header(‘Content-type: image/jpeg’); as I wish to have an image type page.

Here, $source variable refers my main image file. You can use your filename followed by your file path. My main image’s filename is image.jpg

Functions used in this tutorial of adding watermark to images using PHP

$watermark=imagecreatefrompng('watermark.png');

This function takes a filename as a parameter and Returns an image resource identifier on success, FALSE on errors.
You can use URL too if fopen wrappers have been enabled.

$watermark_height= imagesy($watermark);

This function imagesy() returns the height of an image resource. But remember the resource image must be get returned by one of the image creation functions in PHP.

$watermark_width=imagesx($watermark);

This PHP function imagesx() is very much similar to the previous one. But it returns the width of an image resource.

In both the lines, our image resource is our watermark.png image file. We have got the height and width of that image file.

$image=imagecreatetruecolor($watermark_width, $watermark_height)

By this line, we create a new true color image from our watermark image height and width.

This is actually a black image of the same height and width of watermark.png file.

imagecreatefromjpeg() function in PHP almost do the same job as imagecreatefrompng() function. But here our source image resource fill is jpeg type.

imagecopymerge($image, $watermark, $x, $y, 0, 0, $watermark_width, $watermark_width, 100);

Now this line is very much important to add watermark to image using PHP.

In this function, we have several parameters.

The first parameter is $image, this is the place where we can put our main image and just after it we have to use our second parameter. The second parameter is for our watermark.png file.

$x and $y might be confusing for you. This is nothing but the position where we gonna keep our watermark image.

Then 0 and 0 these are the initial or starting position of our x and y-axis.

And the last parameter is known as pct. This is similar two opacity and this value varies from zero to hundred.

This is the function which gonna give us the output watermarked final image.

How to save the watermarked image created by this PHP code

To save this image in your local drive path just simply add another parameter like the below

imagejpeg($image,'watermarked.jpg'); 

This function will create a new file watermarked.jpg which is nothing but the watermarked image. After running this PHP code on your server you can check that in the same path a new file will be generated if everything goes perfect. And the new file is nothing but your final output of this program.

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Add text or image Watermark on image and PDF files

License

ajaxray/php-watermark

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README.md

Add text or image Watermark on image and PDF using PHP and ImageMagick.

PHP ImageMagick extension is not required.

Add as a dependency with composer

$ composer require ajaxray/php-watermark

Or download latest version as a Zip file.

$ composer require ajaxray/php-watermark:v0.1.2

Also you should check older readme file for PHP version

 // Initiate with source image or pdf $watermark = new Watermark('/path/to/source.jpg'); // Customize some options (See list of supported options below) $watermark->withText('ajaxray.com') ->setFontSize(48) ->setRotate(30) ->setOpacity(.4) ->write('path/to/output.jpg'); // Watermark with Image $watermark->withImage('path/to/logo.png') ->setPosition(Watermark::POSITION_BOTTOM_RIGHT) ->setStyle(Watermark::STYLE_IMG_DISSOLVE) ->write('path/to/output.jpg');

If output file name is skipped for Watermark::write() function, the source file will be overridden.

The table below shows customization options and their support matrix. Listed functions should be called on an object of Ajaxray\PHPWatermark\Watermark . Checkmark column titles means the following —

• Txt-Img: Watermarking with text on Image (sample, sample-tiled)
• Img-Img: Watermarking with Image on Image (sample)
• Txt-PDF: Watermarking with text on PDF (sample)
• Img-PDF: Watermarking with Image on PDF (sample)

Function	Value	Txt-Img	Img-Img	Txt-PDF	Img-PDF
setFont(‘Arial’)	string; Font Name	✅	✅
setFontSize(36)	int; Font size	✅	✅
setOpacity(.4)	float; between 0 (opaque) to 1 (transparent)	✅	✅	✅	✅
setRotate(245)	int; between 0 to 360	✅	✅
setPosition($position)	int; One of Watermark::POSITION_* constants	✅	✅	✅	✅
setOffset(50, 100)	int, int; X and Y offset relative to position	✅	✅	✅	✅
setStyle($style)	int; One of Watermark::STYLE_* constants	⌛	✅	⌛	⌛
setTiled()	boolean; (default true )	✅	✅	⌛	⌛
setTileSize(200, 150)	int, int; Width and Height of each tile	✅	⌛

BTW, all the samples linked above are the results of these examples. You may generate them yourself just by running example scripts from command line —

$ php vendor/ajaxray/php-watermark/examples/example_img.php $ php vendor/ajaxray/php-watermark/examples/example_pdf.php

Then you should get the result files in vendor/ajaxray/php-watermark/examples/img and vendor/ajaxray/php-watermark/examples/pdf directories.

Something unexpected? Debug! 🐞 🔫

If anything unexpected happened, try to debug the issue.

First step is to check if PHP is configured to display errors. Alternatively you may add these lines at the top of your script.

ini_set('display_errors', 1); error_reporting(E_ALL);

• The file path mentioned in the second argument of Watermark::withText() and Watermark::withImage() methods.
• Parent of the source file itself if no separate destination mentioned in above methods.

• To see the list of supported font names in your system, run convert -list font on command prompt
• Remember to set appropriate output file extension (e,g, .pdf for pdf files)
• If possible, use absolute path for files to avoid various mistakes.
• STYLE_IMG_* constants are for Image watermarks and Watermark::STYLE_TEXT_* are for text.
• Default text style ( Watermark::STYLE_TEXT_BEVEL ) is expected to be visible on any background. Use other text styles only on selective backgrounds.
• UnitTest are executed and all green against PHP 5.6 and PHP 7.1 using PHPUnit 5.7.5
• I’v tested all intended functionality with ImageMagick 7.0.4-6 Q16 x86_64 and GPL Ghostscript 9.20 installed.

Important Update for PDF watermarking:

When using the imagemagick + ghostscript extraction and joining pdf pages, it has a few drawbacks including file-size issue. Many developers were asking for a solution about the file size and PDF quality since releasing of this library. So, I’ve created a command line tool for PDF watermarking that will work without converting pages into images. As a result, you’ll get better PDF quality and dramatically smaller file size.

Please note that, it’s not a PHP library. So you’ve to use it using exec, shell_exec or Symfony Process Component.

«This is the Book about which there is no doubt, a guidance for those conscious of Allah» — Al-Quran

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Php adding watermark to image

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