PHP generates watermark, including position and transparency

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.

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

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

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

* | 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

PHP generates watermark, including position and transparency_PHP tutorial