<?php    /*PHP图片加文字水印类库           该类库暂时只支持文字水印，位置为右下角，颜色随机       调用方法：     1、在需要加水印的文件顶部引入类库：        include_once 'imageClass.php';     2、声明新类：     $tpl=new image_fu;     3、给图片水印提供参数：        $tpl->img(图片路径,水印文字,字体路径,字体大小,字体角度);     比如：$tpl->img('abc.jpg','这是水印文字','ziti.ttf',30,0)       */     class image_fu{        private $image;    private $img_info;    private $img_width;    private $img_height;    private $img_im;    private $img_text;    private $img_ttf='';    private $img_new;    private $img_text_size;    private $img_jd;            function img($img='',$txt='',$ttf='',$size=12,$jiaodu=0){    if(isset($img)&&file_exists($img)){//检测图片是否存在       $this->image   =$img;        $this->img_text=$txt;       $this->img_text_size=$size;       $this->img_jd=$jiaodu;      if(file_exists($ttf)){       $this->img_ttf=$ttf;      }else{       exit('字体文件：'.$ttf.'不存在！');       }       $this->imgyesno();    }else{         exit('图片文件:'.$img.'不存在');      }     }       private function imgyesno(){        $this->img_info  =getimagesize($this->image);    $this->img_width =$this->img_info[0];//图片宽    $this->img_height=$this->img_info[1];//图片高        //检测图片类型    switch($this->img_info[2]){               case 1:$this->img_im = imagecreatefromgif($this->image);break;                case 2:$this->img_im = imagecreatefromjpeg($this->image);break;                case 3:$this->img_im = imagecreatefrompng($this->image);break;                default:exit('图片格式不支持水印');     }           $this->img_text();    }            private function img_text(){          imagealphablending($this->img_im,true);          //设定颜色      $color=imagecolorallocate($this->img_im,rand(0,255),rand(0,255),rand(0,255));      $txt_height=$this->img_text_size;      $txt_jiaodu=$this->img_jd;      $ttf_im=imagettfbbox($txt_height,$txt_jiaodu,$this->img_ttf,$this->img_text);      $w = $ttf_im[2] - $ttf_im[6];             $h = $ttf_im[3] - $ttf_im[7];       //$w = $ttf_im[7];             //$h = $ttf_im[8];               unset($ttf_im);            $txt_y     =$this->img_height-$h;      $txt_x     =$this->img_width-$w;      //$txt_y     =0;      //$txt_x     =0;                    $this->img_new=@imagettftext($this->img_im,$txt_height,$txt_jiaodu,$txt_x,$txt_y,$color,$this->img_ttf,$this->img_text);          @unlink($this->image);//删除图片    switch($this->img_info[2]) {//取得背景图片的格式             case 1:imagegif($this->img_im,$this->image);break;             case 2:imagejpeg($this->img_im,$this->image);break;             case 3:imagepng($this->img_im,$this->image);break;             default: exit('水印图片失败');           }       }            //显示图片    function img_show(){echo '<img src="'.$this->image.'" border="0" alt="'.$this->img_text."" />';}        //释放内存    private function img_nothing(){     unset($this->img_info);            imagedestroy($this->img_im);     }       }     ?>