if( $this->water ){ $this->watermark($this->filePath,$this->filePath);}

 /** 图片加水印* $source  string  图片资源* $target  string  添加水印后的名字* $w_pos   int     水印位置安排（1-10）【1:左头顶；2:中间头顶；3:右头顶...值空:随机位置】* $w_img   string  水印图片路径* $w_text  string  显示的文字* $w_font  int     字体大小* $w_color string  字体颜色*/public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = '留学问多点',$w_font = 10, $w_color = '#CC0000') {$this->w_img = '../watermark.png';//水印图片$this->w_pos = 9;$this->w_minwidth = 220;//最少宽度$this->w_minheight = 220;//最少高度$this->w_quality = 80;//图像质量$this->w_pct = 50;//透明度$w_pos = $w_pos ? $w_pos : $this->w_pos;$w_img = $w_img ? $w_img : $this->w_img;if(!$this->check($source)) return false;if(!$target) $target = $source;$source_info = getimagesize($source);//图片信息$source_w  = $source_info[0];//图片宽度$source_h  = $source_info[1];//图片高度if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false;switch($source_info[2]) { //图片类型case 1 : //GIF格式$source_img = imagecreatefromgif($source);break;case 2 : //JPG格式$source_img = imagecreatefromjpeg($source);break;case 3 : //PNG格式$source_img = imagecreatefrompng($source);//imagealphablending($source_img,false); //关闭混色模式imagesavealpha($source_img,true); //设置标记以在保存 PNG 图像时保存完整的 alpha 通道信息（与单一透明色相反）break;default :return false;}if(!empty($w_img) && file_exists($w_img)) { //水印图片有效$ifwaterimage = 1; //标记$water_info  = getimagesize($w_img);$width    = $water_info[0];$height    = $water_info[1];switch($water_info[2]) {case 1 :$water_img = imagecreatefromgif($w_img);break;case 2 :$water_img = imagecreatefromjpeg($w_img);break;case 3 :$water_img = imagecreatefrompng($w_img);imagealphablending($water_img,false);imagesavealpha($water_img,true);break;default :return;}}else{$ifwaterimage = 0;$temp = imagettfbbox(ceil($w_font*2.5), 0, './MPublic/fonts/heiti.otf', $w_text); //imagettfbbox返回一个含有 8 个单元的数组表示了文本外框的四个角$width = $temp[2] - $temp[6];$height = $temp[3] - $temp[7];unset($temp);}switch($w_pos) {case 1:$wx = 5;$wy = 5;break;case 2:$wx = ($source_w - $width) / 2;$wy = 0;break;case 3:$wx = $source_w - $width;$wy = 0;break;case 4:$wx = 0;$wy = ($source_h - $height) / 2;break;case 5:$wx = ($source_w - $width) / 2;$wy = ($source_h - $height) / 2;break;case 6:$wx = $source_w - $width;$wy = ($source_h - $height) / 2;break;case 7:$wx = 0;$wy = $source_h - $height;break;case 8:$wx = ($source_w - $width) / 2;$wy = $source_h - $height;break;case 9:$wx = $source_w - ($width+5);$wy = $source_h - ($height+5);break;case 10:$wx = rand(0,($source_w - $width));$wy = rand(0,($source_h - $height));break;       default:$wx = rand(0,($source_w - $width));$wy = rand(0,($source_h - $height));break;}/*dst_im  目标图像src_im  被拷贝的源图像dst_x   目标图像开始 x 坐标dst_y   目标图像开始 y 坐标，x,y同为 0 则从左上角开始src_x   拷贝图像开始 x 坐标src_y   拷贝图像开始 y 坐标，x,y同为 0 则从左上角开始拷贝src_w   （从 src_x 开始）拷贝的宽度src_h   （从 src_y 开始）拷贝的高度pct 图像合并程度，取值 0-100 ，当 pct=0 时，实际上什么也没做，反之完全合并。*/if($ifwaterimage) {if($water_info[2] == 3) {imagecopy($source_img, $water_img, $wx + 10, $wy , 0, 0, $width, $height);}else{imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);}}else{if(!empty($w_color) && (strlen($w_color)==7)) {$r = hexdec(substr($w_color,1,2));$g = hexdec(substr($w_color,3,2));$b = hexdec(substr($w_color,5));}else{return;}imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));}switch($source_info[2]) {case 1 :imagegif($source_img, $target); //GIF 格式将图像输出到浏览器或文件(欲输出的图像资源, 指定输出图像的文件名)break;case 2 :imagejpeg($source_img, $target, $this->w_quality);break;case 3 :imagepng($source_img, $target);break;default :return;}// $font = "./MPublic/fonts/heiti.otf";// $image->open($name)->text("留学问多点",$font,27,'#82797A',array(95,$height))->save($name);if(isset($water_info)){unset($water_info);}if(isset($water_img)) {imagedestroy($water_img);}unset($source_info);imagedestroy($source_img);return true;}public function check($image){return extension_loaded('gd') && preg_match("/\.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));}

<span class="water"">水印: <input  type="radio" name="iswater" class="iswater iswater_a" value="1" checked>是<input type="radio" name="iswater" class="iswater iswater_b" value="0" >否</span>