下面是一個添加水印的方法,可以添加文字水印和圖片水印
- <?php
- /*
- * 功能:PHP圖片水印 (水印支持圖片或文字)
- * 參數:
- * $groundImage 背景圖片,即需要加水印的圖片,暫只支持GIF,JPG,PNG格式;
- * $waterPos 水印位置,有10種狀態,0爲隨機位置;
- * 1爲頂端居左,2爲頂端居中,3爲頂端居右;
- * 4 爲中部居左,5爲中部居中,6爲中部居右;
- * 7爲底端居左,8爲底端居中,9爲底端居右;
- * $waterImage 圖片水印,即作爲水印的圖片,暫只支持GIF,JPG,PNG格式;
- * $waterText 文字水印,即把文字作爲爲水印,支持ASCII碼,不支持中文;
- * $textFont 文字大小,值爲1、2、3、4或5,默認爲5;
- * $textColor 文字顏色,值爲十六進制顏色值,默認爲#FF0000(紅色);
- *
- * 注意:Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
- * $waterImage 和 $waterText 最好不要同時使用,選其中之一即可,優先使用 $waterImage。
- * 當$waterImage有效時,參數$waterString、$stringFont、$stringColor均不生效。
- * 加水印後的圖片的文件名和 $groundImage 一樣。
- * 作者:longware @ 2004-11-3 14:15:13
- */
- function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000")
- {
- $isWaterImage = FALSE;
- $formatMsg = "暫不支持該文件格式,請用圖片處理軟件將圖片轉換爲GIF、JPG、PNG格式。";
- //讀取水印文件
- if(!empty($waterImage) && file_exists($waterImage))
- {
- $isWaterImage = TRUE;
- $water_info = getimagesize($waterImage);
- $water_w = $water_info[0];//取得水印圖片的寬
- $water_h = $water_info[1];//取得水印圖片的高
- switch($water_info[2])//取得水印圖片的格式
- {
- case 1:$water_im = imagecreatefromgif($waterImage);break;
- case 2:$water_im = imagecreatefromjpeg($waterImage);break;
- case 3:$water_im = imagecreatefrompng($waterImage);break;
- default:die('水印圖片格式不正確');
- }
- }
- //讀取背景圖片
- if(!empty($groundImage) && file_exists($groundImage))
- {
- $ground_info = getimagesize($groundImage);
- $ground_w = $ground_info[0];//取得背景圖片的寬
- $ground_h = $ground_info[1];//取得背景圖片的高
- switch($ground_info[2])//取得背景圖片的格式
- {
- case 1:$ground_im = imagecreatefromgif($groundImage);break;
- case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
- case 3:$ground_im = imagecreatefrompng($groundImage);break;
- default:{
- echo('需要加水的圖片格式不支持!');
- return false;
- }
- }
- }
- else
- {
- echo("需要加水印的圖片不存在!");
- return true;
- }
- //水印位置
- if($isWaterImage)//圖片水印
- {
- $w = $water_w;
- $h = $water_h;
- $label = "圖片的";
- }
- else//文字水印
- {
- $temp = imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterText);//取得使用 TrueType 字體的文本的範圍
- $w = $temp[2] - $temp[6];
- $h = $temp[3] - $temp[7];
- unset($temp);
- $label = "文字區域";
- }
- if( ($ground_w<$w) || ($ground_h<$h) )
- {
- echo "需要加水印的圖片的長度或寬度比水印".$label."還小,無法生成水印!<br/>";
- return true;
- }
- switch($waterPos)
- {
- case 0://隨機
- $posX = rand(0,($ground_w - $w));
- $posY = rand(0,($ground_h - $h));
- break;
- case 1://1爲頂端居左
- $posX = 0;
- $posY = 0;
- break;
- case 2://2爲頂端居中
- $posX = ($ground_w - $w) / 2;
- $posY = 0;
- break;
- case 3://3爲頂端居右
- $posX = $ground_w - $w;
- $posY = 0;
- break;
- case 4://4爲中部居左
- $posX = 0;
- $posY = ($ground_h - $h) / 2;
- break;
- case 5://5爲中部居中
- $posX = ($ground_w - $w) / 2;
- $posY = ($ground_h - $h) / 2;
- break;
- case 6://6爲中部居右
- $posX = $ground_w - $w;
- $posY = ($ground_h - $h) / 2;
- break;
- case 7://7爲底端居左
- $posX = 0;
- $posY = $ground_h - $h;
- break;
- case 8://8爲底端居中
- $posX = ($ground_w - $w) / 2;
- $posY = $ground_h - $h;
- break;
- case 9://9爲底端居右
- $posX = $ground_w - $w;
- $posY = $ground_h - $h;
- break;
- default://隨機
- $posX = rand(0,($ground_w - $w));
- $posY = rand(0,($ground_h - $h));
- break;
- }
- //設定圖像的混色模式
- imagealphablending($ground_im, true);
- if($isWaterImage)//圖片水印
- {
- imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷貝水印到目標文件
- }
- 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
- {
- die("水印文字顏色格式不正確!");
- }
- imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
- }
- //生成水印後的圖片
- @unlink($groundImage);
- switch($ground_info[2])//取得背景圖片的格式
- {
- case 1:imagegif($ground_im,$groundImage);break;
- case 2:imagejpeg($ground_im,$groundImage);break;
- case 3:imagepng($ground_im,$groundImage);break;
- default:{
- echo($errorMsg);
- return false;
- }
- }
- //釋放內存
- if(isset($water_info)) unset($water_info);
- if(isset($water_im)) imagedestroy($water_im);
- unset($ground_info);
- imagedestroy($ground_im);
- return true;
- }
- ?>
下面的代碼是給指定目錄下的所有jpg,gif,png圖片添加水印
- <?php
- require_once 'addWater.php';
- set_time_limit(6000);
- header("Chontent-Type:text/html;charset=gbk");
- $arr=addWaterToAll('property_image');
- echo '未添加水印成功的圖片路徑如下:<br/>';
- for($j=0;$j<count($arr);$j++){
- echo $arr[$j].'<br/>';
- }
- function addWaterToAll($dirPath){
- $failImg = array();
- $pathArr=get_filetree($dirPath);
- echo '圖片數量:'.count($pathArr).'<br/>';
- for ($i=0;$i<count($pathArr);$i++){
- $path= $pathArr[$i];
- $typeArr=array('.jpg','.gif','.png');
- if(in_array(substr($path,strrpos($path,'.')),$typeArr)){
- //chmod($path,0777);
- //echo substr($path,strrpos($path,'.'));
- //echo $path;
- $succ=imageWaterMark($path,5,"images/water.png"); //添加水印
- if($succ){
- echo ($i+1).$path.'添加水印成功!<br/>';
- }else{
- echo '失敗:'.$path.'<br/>';
- $failImg[]=$path;
- }
- }
- }
- return $failImg;
- }
- function get_filetree($path){
- $tree = array();
- foreach(glob($path.'/*') as $single){
- if(is_dir($single)){
- $tree = array_merge($tree,get_filetree($single));
- }
- else{
- $tree[] = $single;
- }
- }
- return $tree;
- }
- ?>