PHP watermark code supports text and image watermarks_PHP tutorial

PHP adds picture watermark and text watermark code. PHP adds watermark class. It supports the transparency setting of text and picture watermarks and the transparent background of watermark pictures. I wrote a class myself, because it needs to be used in a set of CMS I developed. People on the Internet always feel that it is not easy to use. I hope everyone likes this class. The usage method of the class is attached.

　001

　002class WaterMask{

　003 public $waterType = 1; //Watermark type: 0 is text watermark, 1 is picture watermark

　004 public $pos = 0; //Watermark position

　005 public $transparent = 45; //Watermark transparency

　006 public $waterStr = 'www.codefans.net'; //Watermark text

　007 public $fontSize = 16; //Text font size

　008 public $fontColor = array(255,0,255); //Watermark text color (RGB)

　009 public $fontFile = 'AHGBold.ttf';//Font file

　010 public $waterImg = 'logo.png';//Watermark image

　011 private $srcImg = '';//Pictures that need to be watermarked

　012 private $im = '';//image handle

　013 private $water_im = '';//Watermark image handle

　014 private $srcImg_info = '';//Picture information

　015 private $waterImg_info = '';//Watermark image information

　016 private $str_w = '';//Watermark text width

　017 private $str_h = '';//Watermark text height

　018 private $x = '';//Watermark X coordinate

　019 private $y = '';//watermark y coordinate

　020 function __construct($img) {

　021 $this->srcImg = file_exists($img) $img : die('"'.$img.'" Sorry, the watermark file does not exist!');

　022}

　023 private function imginfo() {//Get the watermark image information and load it.

　024 $this->srcImg_info = getimagesize($this->srcImg);

　025 switch ($this->srcImg_info[2]) {

　026 case 3:

　027 $this->im = imagecreatefrompng($this->srcImg);

　028 break 1;

　029 case 2:

　030 $this->im = imagecreatefromjpeg($this->srcImg);

　031 break 1;

　032 case 1:

　033 $this->im = imagecreatefromgif($this->srcImg);

　034 break 1;

　035 default:

　036 die('Watermark image ('.$this->srcImg.') The format of the watermark image is incorrect, please choose an image in PNG, JPEG, or GIF format.');

　037}

　038}

　039 private function waterimginfo() {//Get the watermark image and load it.

　040 $this->waterImg_info = getimagesize($this->waterImg);

　041 switch ($this->waterImg_info[2]) {

　042 case 3:

　043 $this->water_im = imagecreatefrompng($this->waterImg);

　044 break 1;

　045 case 2:

　046 $this->water_im = imagecreatefromjpeg($this->waterImg);

　047 break 1;

　048 case 1:

　049 $this->water_im = imagecreatefromgif($this->waterImg);

　050 break 1;

　051 default:

　052 die('The format of the watermark image ('.$this->srcImg.') is incorrect, only PNG, JPEG, and GIF are supported.');

　053}

　054}

　055 private function waterpos() {//Watermark position algorithm

　056 switch ($this->pos) {

　057 case 0: //Random position

　058 $this->x = rand(0,$this->srcImg_info[0]-$this->waterImg_info[0]);

　059 $this->y = rand(0,$this->srcImg_info[1]-$this->waterImg_info[1]);

　060 break 1;

　061 case 1: //Top left

　062 $this->x = 0;

　063 $this->y = 0;

　064 break 1;

　065 case 2: //upper middle

　066 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

　067 $this->y = 0;

　068 break 1;

　069 case 3: //Top right

　070 $this->x = $this->srcImg_info[0]-$this->waterImg_info[0];

　071 $this->y = 0;

　072 break 1;

　073 case 4: //center left

　074 $this->x = 0;

　075 $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

　076 break 1;

　077 case 5: //中中

　078 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

　079 $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

　080 break 1;

　081 case 6: //Center right

　082 $this->x = $this->srcImg_info[0]-$this->waterImg_info[0];

　083 $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

　084 break 1;

　085 case 7: //Lower left

　086 $this->x = 0;

　　087 $this->y = $this->srcImg_info[1]-$this->waterImg_info[1];

　　088 break 1;

　　089 case 8: //下中

　　090 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

　　091 $this->y = $this->srcImg_info[1]-$this->waterImg_info[1];

　　092 break 1;

　　093 default: //下右

　　094 $this->x = $this->srcImg_info[0]-$this->waterImg_info[0];

　　095 $this->y = $this->srcImg_info[1]-$this->waterImg_info[1];

　　096 break 1;

　　097 }

　　098 }

　　099 private function waterimg() {

　　100 if ($this->srcImg_info[0] <= $this->waterImg_info[0] || $this->srcImg_info[1] <= $this->waterImg_info[1]){

　　101 die('水印比原图大!');

　　102 }

　　103 $this->waterpos();

　　104 $cut = imagecreatetruecolor($this->waterImg_info[0],$this->waterImg_info[1]);

　　105 imagecopy($cut,$this->im,0,0,$this->x,$this->y,$this->waterImg_info[0],$this->waterImg_info[1]);

　　106 $pct = $this->transparent;

　　107 imagecopy($cut,$this->water_im,0,0,0,0,$this->waterImg_info[0],$this->waterImg_info[1]);

　　108 imagecopymerge($this->im,$cut,$this->x,$this->y,0,0,$this->waterImg_info[0],$this->waterImg_info[1],$pct);

　　109 }

　　110 private function waterstr() {

　　111 $rect = imagettfbbox($this->fontSize,0,$this->fontFile,$this->waterStr);

　　112 $w = abs($rect[2]-$rect[6]);

　　113 $h = abs($rect[3]-$rect[7]);

　　114 $fontHeight = $this->fontSize;

　　115 $this->water_im = imagecreatetruecolor($w, $h);

　　116 imagealphablending($this->water_im,false);

　　117 imagesavealpha($this->water_im,true);

　　118 $white_alpha = imagecolorallocatealpha($this->water_im,255,255,255,127);

　　119 imagefill($this->water_im,0,0,$white_alpha);

　　120 $color = imagecolorallocate($this->water_im,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);

　　121 imagettftext($this->water_im,$this->fontSize,0,0,$this->fontSize,$color,$this->fontFile,$this->waterStr);

　　122 $this->waterImg_info = array(0=>$w,1=>$h);

　　123 $this->waterimg();

　　124 }

　　125 function output() {

　　126 $this->imginfo();

　　127 if ($this->waterType == 0) {

　　128 $this->waterstr();

　　129 }else {

　　130 $this->waterimginfo();

　　131 $this->waterimg();

　　132 }

　　133 switch ($this->srcImg_info[2]) {

　　134 case 3:

　　135 imagepng($this->im,$this->srcImg);

　　136 break 1;

　　137 case 2:

　　138 imagejpeg($this->im,$this->srcImg);

　　139 break 1;

　　140 case 1:

　　141 imagegif($this->im,$this->srcImg);

　　142 break 1;

　　143 default:

　　144 die('原因未知：水印添加失败!');

　　145 break;

　　146 }

　　147 imagedestroy($this->im);

　　148 imagedestroy($this->water_im);

　　149 }

　　150}

　　151?>

　　PHP生成水印类用法：

　　view sourceprint?01

　　02$obj = new WaterMask($imgFileName);

　　03$obj->$waterType = 1;//水印类型：0为文字水印、1为图片水印

　　04$obj->$transparent = 45;//水印透明度

　　05$obj->$waterStr = 'www.codefans.net';//水印文字

　　06$obj->$fontSize = 16;//字体大小

　　07$obj->$fontColor = array(255,0,255);//水印文字颜色(RGB值)

　　08$obj->$fontFile = = 'AHGBold.ttf'; //字体名称

　　09$obj->output(); //输出水印图片

　　10?>

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