PHP图片水印

 <?php/** * PHP图片水印 (水印支持图片或文字)支持中文 * @param string $groundImage 背景图片路径 * @param intval $waterPos 水印位置:有10种状态，1-9以外为随机位置； * 1为顶端居左，2为顶端居中，3为顶端居右； * 4为中部居左，5为中部居中，6为中部居右； * 7为底端居左，8为底端居中，9为底端居右； * @param array $water_arr 参数数组，可包含如下值： *---------------------------------------------------------------- * string $type 添加水印的类型 , 'img' => 添加水印图片, 'text' => 添加水印文字, * string $path 添加水印图片时,水印图片的路径, * string $content 添加水印文字的文字内容 * string $textColor 添加水印文字的文字颜色 * string $textFont 添加水印文字的文字小大 * string $textFile 添加水印文字的文字字库路径 *---------------------------------------------------------------- * @return mixed 返回TRUE或错误信息，只有当返回TRUE时，操作才是成功的 * @example * <code> * imageWaterMark('./apntc.gif', 1, array('type' => 'img', 'path')); 添加水印图片 * imageWaterMark('./apntc.gif', 1, array('type' => 'text', 'content' => '', 'textColor' => '', 'textFont' => '')); 添加水印文字 * </code> */function imageWaterMark($backgroundPath, $waterPos = 0, $water_arr ){$isWaterImage = FALSE; //读取背景图片if(!empty($backgroundPath) && file_exists($backgroundPath)){$background_info = getimagesize($backgroundPath);$ground_width = $background_info[0];//取得背景图片的宽$ground_height = $background_info[1];//取得背景图片的高 switch($background_info[2])//取得背景图片的格式{case 1:$background_im = imagecreatefromgif($backgroundPath);break;case 2:$background_im = imagecreatefromjpeg($backgroundPath);break;case 3:$background_im = imagecreatefrompng($backgroundPath);break;default:die($formatMsg);}} else { return 'water image is not exists'; } //设定图像的混色模式imagealphablending($background_im, true); if (is_array($water_arr) && !empty($water_arr)) {if($water_arr['type'] === 'img' && !empty($water_arr['path']) && file_exists($water_arr['path'])){$isWaterImage = TRUE; $set = 0;$offset = isset($water_arr['offset']) && !empty($water_arr['offset']) ? $water_arr['offset'] : 0;$water_info = getimagesize($water_arr['path']); $water_width = $water_info[0];//取得水印图片的宽$water_height = $water_info[1];//取得水印图片的高switch($water_info[2])//取得水印图片的格式{case 1:$water_im = imagecreatefromgif($water_arr['path']);break;case 2:$water_im = imagecreatefromjpeg($water_arr['path']);break;case 3:$water_im = imagecreatefrompng($water_arr['path']);break;default:return 'picture format mistake'; } } elseif ($water_arr['type'] === 'text' && $water_arr['content'] !='') { $fontfile = isset($water_arr['fontFile']) && !empty($water_arr['fontFile']) ? $water_arr['fontFile'] : 'simkai.ttf'; $fontfile = 'C:/WINDOWS/Fonts//' . $fontfile ;$waterText = $water_arr['content'];$set = 1;$offset = isset($water_arr['offset']) && !empty($water_arr['offset']) ? $water_arr['offset'] : 5;$textColor = !isset($water_arr['textColor']) || empty($water_arr['textColor']) ? '#FF0000' : $water_arr['textColor']; $textFont = !isset($water_arr['textFont']) || empty($water_arr['textFont']) ? 20 : $water_arr['textFont']; $temp = @imagettfbbox(ceil($textFont),0,$fontfile,$waterText);//取得使用 TrueType 字体的文本的范围 $water_width = $temp[2] - $temp[6]; $water_height = $temp[3] - $temp[7]; unset($temp);} else {return 'parameter mistake';}} else {return FALSE;} if( ($ground_width< $water_width) || ($ground_height<$water_height) ) {return "water image larger than background image"; }switch($waterPos){case 1://1为顶端居左$posX = $offset * $set; $posY = ($water_height + $offset) * $set; break;case 2://2为顶端居中$posX = ($ground_width - $water_width) / 2;$posY = ($water_height + $offset) * $set;break;case 3://3为顶端居右$posX = $ground_width - $water_width - $offset * $set;$posY = ($water_height + $offset) * $set;break;case 4://4为中部居左$posX = $offset * $set;$posY = ($ground_height - $water_height) / 2;break;case 5://5为中部居中$posX = ($ground_width - $water_width) / 2;$posY = ($ground_height - $water_height) / 2;break;case 6://6为中部居右$posX = $ground_width - $water_width - $offset * $set;$posY = ($ground_height - $water_height) / 2;break;case 7://7为底端居左$posX = $offset * $set;$posY = $ground_height - $water_height;break;case 8://8为底端居中$posX = ($ground_width - $water_width) / 2;$posY = $ground_height - $water_height;break;case 9://9为底端居右$posX = $ground_width - $water_width - $offset * $set;$posY = $ground_height -$water_height;break;default://随机$posX = rand(0,($ground_width - $water_width));$posY = rand(0,($ground_height - $water_height)); break;} if($isWaterImage === TRUE) {//图片水印imagealphablending($water_im,true); imagealphablending($background_im,true); imagecopy($background_im, $water_im, $posX, $posY, 0, 0, $water_width,$water_height);//拷贝水印到目标文件} else { //文字水印if( !empty($textColor) && (strlen($textColor)==7) ) {$R = hexdec(substr($textColor,1,2));$G = hexdec(substr($textColor,3,2));$B = hexdec(substr($textColor,5));} else { return "text color format mistake";}imagettftext($background_im, $textFont, 0, $posX, $posY, imagecolorallocate($background_im, $R, $G, $B), $fontfile , $waterText); } //生成水印后的图片@unlink($backgroundPath);switch($background_info[2])//取得背景图片的格式{case 1:imagegif($background_im,$backgroundPath);break;case 2:imagejpeg($background_im,$backgroundPath);break;case 3:imagepng($background_im,$backgroundPath);break;default:die($errorMsg);}if(isset($water_im)) {imagedestroy($water_im);}imagedestroy($background_im);}for ($i =1 ; $i<=9 ;$i++) { imageWaterMark("unset.jpg",$i,array('type' => 'img', 'path' => 'http_imgloadCA9189EB.jpg')); ///imageWaterMark("unset.jpg",$i,array('type' => 'text', 'content' => 'fuck', 'textColor' => '#FF0000', 'textFont' => 20));}?>