用来给图片加水印的PHP类

2015-01-24信息快讯网

不错的一个php添加水印的类

<?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);     
}     
//―――――――――――――――――――――――――――――     
$id=$_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>    
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