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PHP水印类库分享

---water.class.php---类库文件

<?PHP
class WaterMask{
public $waterType = 1; //:0、1
public $pos = 0; //
public $transparent = 45; //
public $waterStr = 'www.itwhy.org'; //
public $fontSize = 16; //
public $fontColor = array(255,0,255); //(RGB
public $fontFile = 'AHGBold.ttf'; //
public $waterImg = 'logo.png'; //
private $srcImg = ''; //
private $im = ''; //
private $water_im = ''; //
private $srcImg_info = ''; //
private $waterImg_info = ''; //
private $str_w = ''; //
private $str_h = ''; //
private $x = ''; //印X
private $y = ''; //印y

function __construct($img) { //
$this->srcImg = file_exists($img) ? $img : die('"'.$img.'" 源文件不存在!');
}
private function imginfo() { //
$this->srcImg_info = getimagesize($this->srcImg);
switch ($this->srcImg_info[2]) {
case 3:
$this->im = imagecreatefrompng($this->srcImg);
break 1;
case 2:
$this->im = imagecreatefromjpeg($this->srcImg);
break 1;
case 1:
$this->im = imagecreatefromgif($this->srcImg);
break 1;
default:
die('原图片('.$this->srcImg.')格式不对,只支持PNG、JPEG、GIF。');
}
}
private function waterimginfo() { //
$this->waterImg_info = getimagesize($this->waterImg);
switch ($this->waterImg_info[2]) {
case 3:
$this->water_im = imagecreatefrompng($this->waterImg);
break 1;
case 2:
$this->water_im = imagecreatefromjpeg($this->waterImg);
break 1;
case 1:
$this->water_im = imagecreatefromgif($this->waterImg);
break 1;
default:
die('水印图片('.$this->srcImg.')格式不对,只支持PNG、JPEG、GIF。');
}
}
private function waterpos() { //
switch ($this->pos) {
case 0: //
$this->x = rand(0,$this->srcImg_info[0]-$this->waterImg_info[0]);
$this->y = rand(0,$this->srcImg_info[1]-$this->waterImg_info[1]);
break 1;
case 1: //
$this->x = 0;
$this->y = 0;
break 1;
case 2: //
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = 0;
break 1;
case 3: //
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0];
$this->y = 0;
break 1;
case 4: //
$this->x = 0;
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 5: //
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 6: //
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0];
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 7: //
$this->x = 0;
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1];
break 1;
case 8: //
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1];
break 1;
default: //
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0]-8;
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1]-8;
break 1;
}
}
private function waterimg() {
if ($this->srcImg_info[0] <= $this->waterImg_info[0] || $this->srcImg_info[1] <= $this->waterImg_info[1]){
die('水印比原图大!');
}
$this->waterpos();
$cut = imagecreatetruecolor($this->waterImg_info[0],$this->waterImg_info[1]);
imagecopy($cut,$this->im,0,0,$this->x,$this->y,$this->waterImg_info[0],$this->waterImg_info[1]);
$pct = $this->transparent;
imagecopy($cut,$this->water_im,0,0,0,0,$this->waterImg_info[0],$this->waterImg_info[1]);
imagecopymerge($this->im,$cut,$this->x,$this->y,0,0,$this->waterImg_info[0],$this->waterImg_info[1],$pct);
}
private function waterstr() {
$rect = imagettfbbox($this->fontSize,0,$this->fontFile,$this->waterStr);
$w = abs($rect[2]-$rect[6]);
$h = abs($rect[3]-$rect[7]);
$fontHeight = $this->fontSize;
$this->water_im = imagecreatetruecolor($w, $h);
imagealphablending($this->water_im,false);
imagesavealpha($this->water_im,true);
$white_alpha = imagecolorallocatealpha($this->water_im,255,255,255,127);
imagefill($this->water_im,0,0,$white_alpha);
$color = imagecolorallocate($this->water_im,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);
imagettftext($this->water_im,$this->fontSize,0,0,$this->fontSize,$color,$this->fontFile,$this->waterStr);
$this->waterImg_info = array(0=>$w,1=>$h);
$this->waterimg();
}
function output() {
$this->imginfo();
if ($this->waterType == 0) {
$this->waterstr();
}else {
$this->waterimginfo();
$this->waterimg();
}
switch ($this->srcImg_info[2]) {
case 3:
imagepng($this->im,$this->srcImg);
break 1;
case 2:
imagejpeg($this->im,$this->srcImg);
break 1;
case 1:
imagegif($this->im,$this->srcImg);
break 1;
default:
die('添加水印失败!');
break;
}
imagedestroy($this->im);
imagedestroy($this->water_im);
}
}
?>

---demo.php----调用示例文件

<?PHP
include 'water.class.php';
$obj = new WaterMask("2000.jpg");//
$obj->waterType = 1 ;//为0为1
$obj->transparent = 100 ;//度0-100
$obj->pos = 9;//置1-
/*1: 上左 2: 上中 3: 上右 4: 中左 5: 中中 6: 中右 7: 下左 8: 下中 >=9 下右
*/
$obj->waterStr = 'www'; //
$obj->fontSize = 16 ;//处16为16px
$obj->fontColor = array(255,0255);//
$obj->fontFile ='mini.ttf'; //
$obj->output(); //

echo '<img src="2000.jpg">';//
?>

ps:水印为图片时即$obj->waterType =1 ,水印logo图片默认于类库文件在同一个文件夹,并且取名logo.png ;您可以修改类库文件设置放置位置。

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