php 图片上传加水印(自动增加水印)

 function upload($uploadfile,$watermark=1,$watertype=1,$content){
  foreach($uploadfile['name'] as $key=>$name) {  //多文件上传函数
   uploadall($uploadfile,$key,$watermark,$watertype,$content);
  }
 }
 function uploadall($uploadfile,$i,$watermark,$watertype,$content) {
  $watermark=$watermark;         //是否附加水印(1为加水印,其他为不加水印);
  $watertype=$watertype;         //水印类型(1为文字,2为图片)
  $watercontent=$content;         //水印的内容
  if(empty($uploadfile['name'][$i])) {
   die("未选择文件上传");
  }
  if($uploadfile['error'][$i] == 2) {   //验证html判断结果
   die("上传的文件太大了");
  }
  $allow_filemaxsize = 2048000;    // 2m
  $filesize = $uploadfile['size'][$i];
  if($filesize > $allow_filemaxsize) {
   die("上传的文件太大了");
  }
  $allow_filetypes = array("jpeg", "gif", "png","jpg","pjpeg");//允许上传的文件统一资源类型 mimetype
  $allow = false;        //默认都不允许
  $mimetype = $uploadfile['type'][$i];  //上传文件的mime文件类型
  foreach($allow_filetypes as $t) {
   if(strpos($mimetype, $t) !== false) {
    $allow = true;      //找到了符合上传条件的文件类型
    break;
   }
  }
  if($allow == false) {
   die("上传的文件类型不被允许");
  }
  $result = is_uploaded_file($uploadfile['tmp_name'][$i]);   //判断是否为上传动作产生的
  if(!$result) {
   die("上传的文件有误");
  }
  $uploaddir = "img/";       //上传文件保存目录
  if(!file_exists($uploaddir)) mkdir($uploaddir, 0777, true);//若上传保存目录不存在，则递归创建
  /**重命名文件**/
  $filetype = explode(".", $uploadfile['name'][$i]);
  $filetype = array_pop($filetype);
  $uploadfilename = time().".".$filetype;
  $_session['filename'] = $uploadfilename;
  //end
  $result = move_uploaded_file($uploadfile['tmp_name'][$i], $uploaddir.$uploadfilename);
  if($result) {
   echo  "文件上传成功";
  }else{
   switch($uploadfile['error'][$i]) {
    case 1:return "上传的文件超出了php.ini中设定的最大值";break;
    case 2:return "上传的文件超出了html中设定的最大值";break;
    case 3:return "文件只有部分被上传";break; 
    case 4;return "没有文件被上传";break; 
    default:die("文件上传失败");  
   }
  }
  if($watermark==1) {
   $iinfo=getimagesize($uploaddir.$uploadfilename);  //获取图片的相关信息，得到数组
   $nimage=imagecreatetruecolor($iinfo[0],$iinfo[1]);
   $white=imagecolorallocate($nimage,255,255,255); //设置背景颜色为白色
   $black=imagecolorallocate($nimage,0,0,0);  //设置背景颜色为黑色
   $red=imagecolorallocate($nimage,255,0,0);  //设置背景颜色为红色
   imagefill($nimage,0,0,$white);     //背景填充为白色
   switch ($iinfo[2]) {
    case 1:
    $simage =imagecreatefromgif($uploaddir.$uploadfilename);
    break;
    case 2:
    $simage =imagecreatefromjpeg($uploaddir.$uploadfilename);
    break;
    case 3:
    $simage =imagecreatefrompng($uploaddir.$uploadfilename);
    break;
    case 6:
    $simage =imagecreatefromwbmp($uploaddir.$uploadfilename);
    break;
    default:
    die("不支持的文件类型");
    exit;
   }
   imagecopy($nimage,$simage,0,0,0,0,$iinfo['0'],$iinfo['1']);
   switch($watertype) {
    case 1:             //加水印字符串
    imagestring($nimage,5,$iinfo['0']/2-50,$iinfo['1']-30,$watercontent,$black);
    break;
    case 2:            //加水印图片
    $simage1 =imagecreatefromgif($watercontent);
    $size = getimagesize($watercontent);
    imagecopy($nimage,$simage1,$iinfo['0']/2+50,$iinfo['1']-100,0,0,$size[0],$size[1]);
    imagedestroy($simage1);
    break;
   }

   switch ($iinfo[2]) {
    case 1:
    imagejpeg($nimage, $uploaddir.$uploadfilename); //将图像$nimage以$destination文件名创建一个jpeg的格式文件
    break;
    case 2:
    imagejpeg($nimage, $uploaddir.$uploadfilename);
    break;
    case 3:
    imagepng($nimage, $uploaddir.$uploadfilename);
    break;
    case 6:
    imagewbmp($nimage, $uploaddir.$uploadfilename);
    break;
   }
   imagedestroy($nimage);    //覆盖原上传文件
   imagedestroy($simage);
  }
}
if(@$_get['act'] == "insert") {    //未作参数校验
     //该函数的四个参数分别是：上传控件的name值；是否加水印（1为加，其他数字为不佳）；
     //水印的类型（1为字符串，2为图片）；水印的内容,字符串时写数据，图片时写图片的地址；
 $picture = upload($_files['picture'],1,2,"img/watermark.gif");//上传文件，并返回上传后的文件路径名

}

?>

<form method="post" action="" enctype="multipart/form-data">
 <table border="1" cellpadding="5" cellspacing="0">
  <tr>
   <td>产品图片：</td>
   <td><input type="hidden" name="max_file_size" value="1024000">
    <input type="file" name="picture[]">
   </td>
  </tr>
  <tr>
   <td colspan="2" align="center"><input type="submit" value="提交"></td>
  </tr>
 </table>
</form>

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312" />
<title> php教程文件上传代码</title>
</head>

<body>

<form method="post" enctype="multipart/form-data" action ="uploads.php">
<input type = "file" name="uploadedfile" size="30">
<input type = "hidden" name = "max_file_size" value="100000">
<input type = "submit" value = "上传文件">
</form>

</body>
</html>

$dir = 'www.111cn.net';
if( is_dir( $dir ) ) //判断是否为目录
{
 if( rmdir( $dir ) )
 {
  echo '目录删除成功';
 }
 else
 {
  echo '没有删除目录的权限';
 }
}
else
{
 echo '不是一个有效的目录';
}