PHP加水印代码 支持文字和图片水印
PHP加图片水印、文字水印类代码,PHP加水印类,支持文字图片水印的透明度设置、水印图片背景透明。自己写的一个类,因为自己开发的一套CMS中要用到,网上的总感觉用着不顺手,希望大家也喜欢这个类,后附有类使用方法。
<?php class WaterMask{ public $waterType = 1; //水印类型:0为文字水印、1为图片水印 public $pos = 0; //水印位置 public $transparent = 45; //水印透明度 public $waterStr = 'www.aizhanzhe.com'; //水印文字 public $fontSize = 16; //文字字体大小 public $fontColor = array(255,0,255); //水印文字颜色(RGB) public $fontFile = 'AHGBold.ttf';//字体文件 public $waterImg = 'logo.png';//水印图片 private $srcImg = '';//需要添加水印的图片 private $im = '';//图片句柄 private $water_im = '';//水印图片句柄 private $srcImg_info = '';//图片信息 private $waterImg_info = '';//水印图片信息 private $str_w = '';//水印文字宽度 private $str_h = '';//水印文字高度 private $x = '';//水印X坐标 private $y = '';//水印y坐标 function __construct($img) { $this->srcImg = file_exists($img) $img : die('"'.$img.'" 对不起,水印文件不存在!'); } private function imginfo() {//获取水印图片信息,并加载。 $this->srcImg_info = getimagesize($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('水印图片('.$this->srcImg.')水印图片格式不对,请选择PNG、JPEG、GIF格式的图片。'); } } private function waterimginfo() {//获取水印图片并载入。 $this->waterImg_info = getimagesize($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('.$this->srcImg.')格式不对,只支持PNG、JPEG、GIF。'); } } private function waterpos() {//水印位置算法 switch ($this->pos) { case 0: //随机位置 $this->x = rand(0,$this->srcImg_info[0]-$this->waterImg_info[0]); $this->y = rand(0,$this->srcImg_info[1]-$this->waterImg_info[1]); break 1; case 1: //上左 $this->x = 0; $this->y = 0; break 1; case 2: //上中 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2; $this->y = 0; break 1; case 3: //上右 $this->x = $this->srcImg_info[0]-$this->waterImg_info[0]; $this->y = 0; break 1; case 4: //中左 $this->x = 0; $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2; break 1; case 5: //中中 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2; $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2; break 1; case 6: //中右 $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: //下左 $this->x = 0; $this->y = $this->srcImg_info[1]-$this->waterImg_info[1]; break 1; case 8: //下中 $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2; $this->y = $this->srcImg_info[1]-$this->waterImg_info[1]; break 1; default: //下右 $this->x = $this->srcImg_info[0]-$this->waterImg_info[0]; $this->y = $this->srcImg_info[1]-$this->waterImg_info[1]; 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('原因未知:水印添加失败!'); break; } imagedestroy($this->im); imagedestroy($this->water_im); } } ?>
PHP生成水印类用法:
<?php $obj = new WaterMask($imgFileName); $obj->$waterType = 1;//水印类型:0为文字水印、1为图片水印 $obj->$transparent = 45;//水印透明度 $obj->$waterStr = 'www.aizhanzhe.com';//水印文字 $obj->$fontSize = 16;//字体大小 $obj->$fontColor = array(255,0,255);//水印文字颜色(RGB值) $obj->$fontFile = = 'AHGBold.ttf'; //字体名称 $obj->output(); //输出水印图片 ?>
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