php图片水印类,php为图片添加水印函数代码

发布时间:2020-06-09编辑:脚本学堂
分享一个php添加水印的类,php图片水印,水印支持图片或文字,加水印后的图片的文件名和 $groundimage 一样,支持的文件格式有gif、jpg、png格式等。

例子,php图片水印代码:
 

复制代码 代码示例:

<?php
/*
* 功能:php图片水印 (水印支持图片或文字)
* 参数:
* $groundimage   背景图片,即需要加水印的图片,暂只支持gif,jpg,png格式;
* $waterPos 水印位置,有10种状态,0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;
* $waterImage 图片水印,即作为水印的图片,暂只支持GIF,JPG,PNG格式;
* $waterText 文字水印,即把文字作为为水印,支持ASCII码,不支持中文;
* $textFont 文字大小,值为1、2、3、4或5,默认为5;
* $textColor 文字颜色,值为十六进制颜色值,默认为#FF0000(红色);
*
* 注意:Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
* $waterImage 和 $waterText 最好不要同时使用,选其中之一即可,优先使用 $waterImage。
* 当$waterImage有效时,参数$waterString、$stringFont、$stringColor均不生效。
* 加水印后的图片的文件名和 $groundImage 一样。
* 作者:longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($groundImage,$waterPos=0,$waterImage=”",$waterText=”",$textFont=5,$textColor=”#FF0000″)
{
  $isWaterImage = FALSE;
  $formatMsg = “暂不支持该文件格式,请用图片处理软件将图片转换为GIF、JPG、PNG格式。”;
//读取水印文件
  if(!emptyempty($waterImage) && file_exists($waterImage))
  {
$isWaterImage = TRUE;
$water_info = getimagesize($waterImage);
$water_w   = $water_info[0];//取得水印图片的宽
$water_h   = $water_info[1];//取得水印图片的高
switch($water_info[2])//取得水印图片的格式
{
case 1:$water_im = imagecreatefromgif($waterImage);break;
case 2:$water_im = imagecreatefromjpeg($waterImage);break;
case 3:$water_im = imagecreatefrompng($waterImage);break;
default:die($formatMsg);
}
  }
//读取背景图片
  if(!emptyempty($groundImage) && file_exists($groundImage))
  {
$ground_info = getimagesize($groundImage);
$ground_w   = $ground_info[0];//取得背景图片的宽
$ground_h   = $ground_info[1];//取得背景图片的高
switch($ground_info[2])//取得背景图片的格式
{
case 1:$ground_im = imagecreatefromgif($groundImage);break;
case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
case 3:$ground_im = imagecreatefrompng($groundImage);break;
default:die($formatMsg);
}
  }
  else
  {
die(”需要加水印的图片不存在!”);
  }
//水印位置
  if($isWaterImage)//图片水印
  {
$w = $water_w;
$h = $water_h;
$label = “图片的”;
  }
  else//文字水印
  {
$temp = imagettfbbox(ceil($textFont*5),0,”./cour.ttf”,$waterText);//取得使用 TrueType 字体的文本的范围
$w = $temp[2] - $temp[6];
$h = $temp[3] - $temp[7];
unset($temp);
$label = “文字区域”;
  }
  if( ($ground_w<$w) || ($ground_h<$h) )
  {
echo “需要加水印的图片的长度或宽度比水印”.$label.”还小,无法生成水印!”;
return;
  }
  switch($waterPos)
  {
case 0://随机
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
case 1://1为顶端居左
$posX = 0;
$posY = 0;
break;
case 2://2为顶端居中
$posX = ($ground_w - $w) / 2;
$posY = 0;
break;
case 3://3为顶端居右
$posX = $ground_w - $w;
$posY = 0;
break;
case 4://4为中部居左
$posX = 0;
$posY = ($ground_h - $h) / 2;
break;
case 5://5为中部居中
$posX = ($ground_w - $w) / 2;
$posY = ($ground_h - $h) / 2;
break;
case 6://6为中部居右
$posX = $ground_w - $w;
$posY = ($ground_h - $h) / 2;
break;
case 7://7为底端居左
$posX = 0;
$posY = $ground_h - $h;
break;
case 8://8为底端居中
$posX = ($ground_w - $w) / 2;
$posY = $ground_h - $h;
break;
case 9://9为底端居右
$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://随机
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;  
  }
//设定图像的混色模式
  imagealphablending($ground_im, true);
if($isWaterImage)//图片水印
  {
imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件  
  }
  else//文字水印
  {
if( !emptyempty($textColor) && (strlen($textColor)==7) )
{
$R = hexdec(substr($textColor,1,2));
$G = hexdec(substr($textColor,3,2));
$B = hexdec(substr($textColor,5));
}
else
{
die(”水印文字颜色格式不正确!”);
}
imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));  
  }
//生成水印后的图片
  @unlink($groundImage);
  switch($ground_info[2])//取得背景图片的格式
  {
case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:die($errorMsg);
  }
//释放内存
  if(isset($water_info)) unset($water_info);
  if(isset($water_im)) imagedestroy($water_im);
  unset($ground_info);
  imagedestroy($ground_im);
}
//- www.jb200.com
$id=$_REQUEST['id'];
$num = count($_FILES['userfile']['name']);
print_r($_FILES['userfile']);
print_r($_FILES['userfile']['name']);
echo $num;
echo “<bR>”;
if(isset($id)){
 for($i=0;$i<$id;$i++){
if(isset($_FILES) && !emptyempty($_FILES['userfile']) && $_FILES['userfile']['size']>0)
{
  $uploadfile = “./”.time().”_”.$_FILES['userfile'][name][$i];
  echo “<br>”;
  echo $uploadfile;
  if (copy($_FILES['userfile']['tmp_name'][$i], $uploadfile))
  {
echo “OK<br>”;
//文字水印
//imageWaterMark($uploadfile,5,”",”HTTP://www.lvye.info”,5,”#cccccc“);
//图片水印
$waterImage=”logo_ok1.gif”;//水印图片路径
imageWaterMark($uploadfile,9,$waterImage);
echo “<img src=”".$uploadfile.”” border=”0”>”;
  }
  else
  {
echo “Fail<br>”;
  }
}
 }
}
?>
<form enctype=”multipart/form-data” method=”POST”>
<?php
for($a=0;$a<$id;$a++){
 echo “文件: <input name=”userfile[]” type=”file”><br>”;

}
?>
<input type=”submit” value=”上传”>
</form>