PHP – Watermark your images with PHP 5 and GD
Posted by elg3ne on 5 Mar 2008 10:09 am. Filed under Scipts & Tutorials.
I used this script to add watermark image on the picture uploaded to my previous site. Very nice script.
============================
WATERMARK.PHP
============================
<?php
// NOTE: class is experimental
// Copyright (c) 2006, Simon Jansson <http://www.litewebsite.com> all rights reserved.
// License <http://litewebsite.com/license_BSD.html>
//liteStamp::GDversion();
//$stamp = new LiteStamp('originalImage.jpg', 'stampImage.jpg', 'stamp_');
//$stamp->stampPicture();
class LiteStamp{
// class variables
private $fileHandle = null;
private $newPictureName = null;
private $pictureInfo = null;
private $pictureName = null;
private $prefix = null;
private $stampInfo = null;
private $stampName = null;
private $stampXpos = null;
private $stampYpos = null;
function __construct($picture, $stamp, $prefix = 'stamp_'){
$this->pictureName = $picture; // original picture to place stamp/watermark on
$this->stampName = $stamp; // stamp/watermark picture
$this->prefix = $prefix; // prefix of new stamped picture
}// end of construct
public static function GDversion(){
// GD 2.0.28 or newer is recommended version to use
// http://www.php.net/manual/en/function.gd-info.php
var_dump(gd_info()); // dump information about your GD version
return true;
}// end of GDversion
private function openImage($fileName, $type){
// open picture with correct image function. Add more types if needed.
// GIF: http://php.net/manual/en/function.imagecreatefromgif.php
// JPG/JPEG: http://php.net/manual/en/function.imagecreatefromjpeg.php
// PNG: http://php.net/manual/en/function.imagecreatefrompng.php
switch ($type){
case 1: // GIF
$this->fileHandle = imagecreatefromgif($fileName);
break;// case 1
case 2: // JPG/JPEG
$this->fileHandle = imagecreatefromjpeg($fileName);
break;// case 2
case 3: // PNG
$this->fileHandle = imagecreatefrompng($fileName);
break;// case 3
default:
die('Unsupported filetype: '.$fileName);
}
return $this->fileHandle;
}// end of openImage
public function stampPicture(){
// get picture info such as width, height and extension
// http://php.net/manual/en/function.getimagesize.php
$this->pictureInfo = getimagesize($this->pictureName) or die('Error getting picture info. Double check file path.');
$this->stampInfo = getimagesize($this->stampName) or die('Error getting stamp info. Double check file path.');
// open images with class method openImage()
$this->pictureFile = $this->openImage($this->pictureName, $this->pictureInfo[2]);
$this->stampFile = $this->openImage($this->stampName, $this->stampInfo[2]);
// position the stamp in the lower right corner
$this->stampXpos = $this->pictureInfo[0] - $this->stampInfo[0] - 15; // width - width - margin
$this->stampYpos = $this->pictureInfo[1] - $this->stampInfo[1] - 15; // height - height - margin
// set a new name for the stamped picture and keep the original picture intact
$this->newPictureName = $this->prefix.$this->pictureName;
// alpha blending: http://php.net/manual/en/function.imagealphablending.php
imagealphablending($this->pictureFile, true);
// merge the two images: http://php.net/manual/en/function.imagecopymerge.php
imagecopymerge($this->pictureFile, $this->stampFile, $this->stampXpos, $this->stampYpos, 0, 0, $this->stampInfo[0], $this->stampInfo[1], 100);
// output the stamped image as GIF, JPG/JPEG or PNG. Add more types if needed.
// default type is the same as the original file
// GIF: http://php.net/manual/en/function.imagegif.php
// JPG/JPEG: http://php.net/manual/en/function.imagejpeg.php
// PNG: http://php.net/manual/en/function.imagepng.php
switch ($this->pictureInfo[2]){
case 1: // GIF
imagegif($this->pictureFile, $this->newPictureName);
break;// case 1
case 2:// JPG/JPEG
imagejpeg($this->pictureFile, $this->newPictureName);
break;// case 2
case 3: // PNG
imagepng($this->pictureFile, $this->newPictureName);
break;// case 3
default:
die('Unsupported filetype: '.$fileName);
}
return true;
}// end of stampPicture
function destruct(){
unset($fileHandle, $newPictureName, $pictureInfo, $pictureName, $prefix, $stampInfo, $stampName, $stampXpos, $stampYpos);
}// end of destruct
}// end of class
?>
<?php
$stamp = new LiteStamp('location_map2.gif', 'watermark.png', 'stamp_');
$stamp->stampPicture();
?>
WATERMARK.PHP
============================
<?php
// NOTE: class is experimental
// Copyright (c) 2006, Simon Jansson <http://www.litewebsite.com> all rights reserved.
// License <http://litewebsite.com/license_BSD.html>
//liteStamp::GDversion();
//$stamp = new LiteStamp('originalImage.jpg', 'stampImage.jpg', 'stamp_');
//$stamp->stampPicture();
class LiteStamp{
// class variables
private $fileHandle = null;
private $newPictureName = null;
private $pictureInfo = null;
private $pictureName = null;
private $prefix = null;
private $stampInfo = null;
private $stampName = null;
private $stampXpos = null;
private $stampYpos = null;
function __construct($picture, $stamp, $prefix = 'stamp_'){
$this->pictureName = $picture; // original picture to place stamp/watermark on
$this->stampName = $stamp; // stamp/watermark picture
$this->prefix = $prefix; // prefix of new stamped picture
}// end of construct
public static function GDversion(){
// GD 2.0.28 or newer is recommended version to use
// http://www.php.net/manual/en/function.gd-info.php
var_dump(gd_info()); // dump information about your GD version
return true;
}// end of GDversion
private function openImage($fileName, $type){
// open picture with correct image function. Add more types if needed.
// GIF: http://php.net/manual/en/function.imagecreatefromgif.php
// JPG/JPEG: http://php.net/manual/en/function.imagecreatefromjpeg.php
// PNG: http://php.net/manual/en/function.imagecreatefrompng.php
switch ($type){
case 1: // GIF
$this->fileHandle = imagecreatefromgif($fileName);
break;// case 1
case 2: // JPG/JPEG
$this->fileHandle = imagecreatefromjpeg($fileName);
break;// case 2
case 3: // PNG
$this->fileHandle = imagecreatefrompng($fileName);
break;// case 3
default:
die('Unsupported filetype: '.$fileName);
}
return $this->fileHandle;
}// end of openImage
public function stampPicture(){
// get picture info such as width, height and extension
// http://php.net/manual/en/function.getimagesize.php
$this->pictureInfo = getimagesize($this->pictureName) or die('Error getting picture info. Double check file path.');
$this->stampInfo = getimagesize($this->stampName) or die('Error getting stamp info. Double check file path.');
// open images with class method openImage()
$this->pictureFile = $this->openImage($this->pictureName, $this->pictureInfo[2]);
$this->stampFile = $this->openImage($this->stampName, $this->stampInfo[2]);
// position the stamp in the lower right corner
$this->stampXpos = $this->pictureInfo[0] - $this->stampInfo[0] - 15; // width - width - margin
$this->stampYpos = $this->pictureInfo[1] - $this->stampInfo[1] - 15; // height - height - margin
// set a new name for the stamped picture and keep the original picture intact
$this->newPictureName = $this->prefix.$this->pictureName;
// alpha blending: http://php.net/manual/en/function.imagealphablending.php
imagealphablending($this->pictureFile, true);
// merge the two images: http://php.net/manual/en/function.imagecopymerge.php
imagecopymerge($this->pictureFile, $this->stampFile, $this->stampXpos, $this->stampYpos, 0, 0, $this->stampInfo[0], $this->stampInfo[1], 100);
// output the stamped image as GIF, JPG/JPEG or PNG. Add more types if needed.
// default type is the same as the original file
// GIF: http://php.net/manual/en/function.imagegif.php
// JPG/JPEG: http://php.net/manual/en/function.imagejpeg.php
// PNG: http://php.net/manual/en/function.imagepng.php
switch ($this->pictureInfo[2]){
case 1: // GIF
imagegif($this->pictureFile, $this->newPictureName);
break;// case 1
case 2:// JPG/JPEG
imagejpeg($this->pictureFile, $this->newPictureName);
break;// case 2
case 3: // PNG
imagepng($this->pictureFile, $this->newPictureName);
break;// case 3
default:
die('Unsupported filetype: '.$fileName);
}
return true;
}// end of stampPicture
function destruct(){
unset($fileHandle, $newPictureName, $pictureInfo, $pictureName, $prefix, $stampInfo, $stampName, $stampXpos, $stampYpos);
}// end of destruct
}// end of class
?>
<?php
$stamp = new LiteStamp('location_map2.gif', 'watermark.png', 'stamp_');
$stamp->stampPicture();
?>