PHP generates watermark, including position and transparency_PHP tutorial

/*

Recommend it to everyone! It mainly includes image cropping, scaling, watermarking, etc. Here are some simple ways to use it.

include("imageclass.php"); //Pay attention to the path of imageclass.php here

$imgs=new image();

$imgs->param($tempFile);

if(!$imgs->thumb($targetFile,600,500))die('--Image upload failed!'); //Zoom the image

$imgs->water($targetFile,$water,$pos=0,$pct=50); mainly includes two parameters, $targetFile is the file path that has been uploaded to the server, $water is the watermark image, $pos is Watermark image position, $pct is transparency;

$pos location description:

0://random

1://1 is the top left

2://2 is top and center

3://3 means top right

4://4 means the center is on the left

5://5 is centered in the middle

6://6 means the center is on the right

7://7 means the bottom is on the left

8://8 is bottom-centered

9://9 means the bottom is on the right

Save the contents of // in imageclass.php and you can call it.

////////////////////////////////////////////////////// /////////////

*/

?>

/* +-------------------------------------------------- ---------------+

* | Copyright (c) 2008-2009 Diqiye.Com All rights reserved.

* +------------------------------------------------ -------------+

* | Info: Image processing class

* +------------------------------------------------ -------------+

*/

class image {

// The current picture <<>

        protected $img;

​​​​ // Image type correspondence table

         protected $types = array(

1 = & gt; 'gif',

2 = & gt; 'jpg',

3 = & gt; 'png',

6 = & gt; 'BMP'

);

// image

         public function __construct($img=''){

                     !$img && $this->param($img);

}

               // Info

         public function param($img){

                     $this->img = $img;

                    return $this;

}

// imageInfo

         public function getImageInfo($img){

                      $info = @getimagesize($img);

If(isset($this->types[$info[2]])){

$info['ext'] = $info['type'] = $this->types[$info[2]];

                     } else{

$info['ext'] = $info['type'] = 'jpg';

                }

$info['type'] == 'jpg' && $info['type'] = 'jpeg';

                       $info['size'] = @filesize($img);

                       return $info;

}

                  // thumb(new image address, width, height, crop, allow zooming in)

Public function thumb($filename,$new_w=160,$new_h=120,$cut=0,$big=0){

                         

​​​​ // Get original image information

$info = $this->getImageInfo($this->img);

If(!empty($info[0])) {

               $old_w = $info[0];

               $old_h = $info[1];

$type = $info['type'];

$ext = $info['ext'];

                unset($info);

                    // If the original image is smaller than the thumbnail and no enlargement is allowed

If($old_w < $new_h && $old_h < $new_w && !$big){

                         return false;

            }

                                                                                                                                                    

                if($cut == 0){ // Equiproportional sequence

                           $scale = min($new_w/$old_w, $new_h/$old_h); // Calculate the scaling ratio

                          $width = (int)($old_w*$scale); // Thumbnail size

                          $height = (int)($old_h*$scale);

$start_w = $start_h = 0;

                          $end_w = $old_w;

                        $end_h = $old_h;

                 } elseif($cut == 1){ // center center crop

$scale1 = round($new_w/$new_h,2);

                               $scale2 = round($old_w/$old_h,2);

If($scale1 > $scale2){

$end_h = round($old_w/$scale1,2);

                                                                     

                                                          

                                                                 

                                                                                                                                                                                                       

$end_w = round($old_h*$scale1,2);

                                $start_w  = ($old_w-$end_w)/2;

                                $start_h = 0;

                                $end_h   = $old_h;

                        }

                        $width = $new_w;

                    $height= $new_h;

                } elseif($cut == 2){ // left top 裁剪

                        $scale1 = round($new_w/$new_h,2);

                    $scale2 = round($old_w/$old_h,2);

                    if($scale1 > $scale2){

                            $end_h = round($old_w/$scale1,2);

                            $end_w = $old_w;

                    } else{

                            $end_w = round($old_h*$scale1,2);

                            $end_h = $old_h;

                    }

                    $start_w = 0;

                    $start_h = 0;

                    $width = $new_w;

                    $height= $new_h;

                }

            // 载入原图

            $createFun  = 'ImageCreateFrom'.$type;

            $oldimg     = $createFun($this->img);

            // 创建缩略图

            if($type!='gif' && function_exists('imagecreatetruecolor')){

                $newimg = imagecreatetruecolor($width, $height);

            } else{

                $newimg = imagecreate($width, $height);

            }

            // 复制图片

            if(function_exists("ImageCopyResampled")){

                    ImageCopyResampled($newimg, $oldimg, 0, 0, $start_w, $start_h, $width, $height, $end_w,$end_h);

               } else{

ImageCopyResized($newimg, $oldimg, 0, 0, $start_w, $start_h, $width, $height, $end_w,$end_h);

            }

//Set interlacing for jpeg graphics

$type == 'jpeg' && imageinterlace($newimg,1);

                                                                                                                                                                                                                                                                                     

              $imageFun = 'image'.$type;

              !@$imageFun($newimg,$filename,100) && die('Save failed! Check whether the directory exists and is writable?');

ImageDestroy($newimg);

ImageDestroy($oldimg);

                return $filename;

}

         return false;

}

// water(save address, watermark image, watermark position, transparency)

         public function water($filename,$water,$pos=0,$pct=50){

                                                                                                                                                                                                                 

$info = $this->getImageInfo($water);

If(!empty($info[0])){

$water_w = $info[0];

                              $water_h = $info[1];

                                 $type = $info['type'];

$fun = 'imagecreatefrom'.$type;

$waterimg = $fun($water);

                     } else{

                                                  return false;

                }

​​​​​​​​

$info = $this->getImageInfo($this->img);

If(!empty($info[0])){

                                                         

$old_h = $info[1];

$type = $info['type'];

$fun = 'imagecreatefrom'.$type;

$oldimg = $fun($this->img);

                     } else{

                                                  return false;

                }

                                                                                                                                                                                                         

$water_w >$old_w && $water_w = $old_w;

$water_h >$old_h && $water_h = $old_h;

// Watermark position

switch($pos){

case 0://random

                             $posX = rand(0,($old_w - $water_w));

                              $posY = rand(0,($old_h - $water_h));

break;

case 1://1 is the top left

                          $posX = 0;

                           $posY = 0;

break;

case 2://2 is top-centered

                          $posX = ($old_w - $water_w) / 2;

                        $posY = 0;

break;

case 3://3 is the top right

                            $posX = $old_w - $water_w;

                          $posY = 0;

break;

case 4://4 is the center on the left

                          $posX = 0;

                           $posY = ($old_h - $water_h) / 2;

break;

case 5://5 is centered in the middle

                          $posX = ($old_w - $water_w) / 2;

                           $posY = ($old_h - $water_h) / 2;

break;

case 6://6 is the center on the right

                            $posX = $old_w - $water_w;

                           $posY = ($old_h - $water_h) / 2;

break;

case 7://7 means the bottom is on the left

                          $posX = 0;

                           $posY = $old_h - $water_h;

break;

                   case 8://8 is the bottom center

                          $posX = ($old_w - $water_w) / 2;

                           $posY = $old_h - $water_h;

break;

case 9://9 is the bottom right

                            $posX = $old_w - $water_w;

                           $posY = $old_h - $water_h;

break;

Default: // Random

                             $posX = rand(0,($old_w - $water_w));

                              $posY = rand(0,($old_h - $water_h));

break;

                }

                                                                                             // Set the color blending mode of the image

Imagealphablending($oldimg, true);

                                                                                                                                                                         

Imagecopymerge($oldimg, $waterimg, $posX, $posY, 0, 0, $water_w,$water_h,$pct);

                     $fun = 'image'.$type;

                   !@$fun($oldimg, $filename,100) && die('Save failed! Check whether the directory exists and is writable?');

                      imagedestroy($oldimg);

                      imagedestroy($waterimg);

                                                    return $filename;

}

}

$imgs=new image();

$tempFile = "./images/hdb.jpg";

$water = "./images/bamiluo.jpg";

$imgs->param($tempFile);

//if(!$imgs->thumb($targetFile,600,500))die('fail');

$imgs->water($targetFile,$water,0,10);

echo "aaa";

?>

Excerpted from: ws07_byyy’s column

http://www.bkjia.com/PHPjc/478568.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478568.htmlTechArticle?php /* Recommend it to everyone! It mainly includes image cropping, scaling, watermarking, etc. Here are some simple ways to use it. include(imageclass.php); //Pay attention to imageclass.php here...