php上传文件并生成缩略图的函数

完整代码如下。

* 
******************************************************/
function UpLoadFileAll($input='UpPic', $path='upload', $ftype='jpg,gif,png', $fsize=2){
$fileInfo = $_FILES[$input];                           //文件信息
if(strrpos($path, '/') < strlen($path)-1) $path .= '/';   //上传文件夹.
$myfile = CreatMyFile($path);                             //创建文件夹
if($myfile==false) return false;
$Atype = explode(',', $ftype);                            //文件类型.
$fsize = $fsize*1048576;                                  //(1024*1024==1048576=1M)限文件大小，按字节. 
   $js = "以下文件上传成功：\\n\\n";
if(is_array($fileInfo["error"])){
   foreach ($fileInfo["error"] as $key => $error){
     if ($error == 0) {      
     $name = $fileInfo["name"][$key];              //客户端机器文件的原名称.
     $size = $fileInfo["size"][$key];              //上传文件的大小，单位为字节.
     $type = $fileInfo["type"][$key];              //上传文件类型.
     $tmp_name = $fileInfo["tmp_name"][$key];      //文件被上传后在服务端储存的临时文件名.
     $type = MyFileType($type);                    //检测上传文件类型.
     $path = $myfile.MakeFname($type);             //文件路径包括文件名.     
     if(in_array($type, $Atype) && $size<=$fsize){
     if(@move_uploaded_file($tmp_name, $path)){
      $array[] = $path;
      $js .= " ".$name." 上传成功 ！\\n";
        }
     }
     }
   }
}
echo "";
return $array;
}
/*****************************************************************************
* 重设图片尺寸大小:ResizeImage(原图片路径,缩略图(最大)宽度,缩略图(最大)高度)
* 返回值: 
*     失败返回: FLASH.
*     成功返回：缩略图路径.
*****************************************************************************/
function ResizeImage($path, $maxwidth, $maxheight){
$picS = substr($path, -3);
$name = substr($path, 0, strrpos($path, '.')).'_S';
switch($picS){
case 'jpg':
    $im = @imagecreatefromjpeg($path); 
    break;
case 'gif':
    $im = @imagecreatefromgif($path); 
    break;
default:
    $im = @imagecreatefrompng($path);
}
$width = imagesx($im); 
$height = imagesy($im); 
if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){
   if($maxwidth && $width > $maxwidth){
    $widthratio = $maxwidth/$width; 
    $RESIZEWIDTH=true; 
    }//end if
    if($maxheight && $height > $maxheight){
     $heightratio = $maxheight/$height; 
     $RESIZEHEIGHT=true; 
    }//end if
    if($RESIZEWIDTH && $RESIZEHEIGHT){
     if($widthratio < $heightratio){
      $ratio = $widthratio; 
     }else{
      $ratio = $heightratio; 
     } 
    }elseif($RESIZEWIDTH){
     $ratio = $widthratio; 
    }elseif($RESIZEHEIGHT){
     $ratio = $heightratio; 
    }//end if
    $newwidth = $width * $ratio; 
    $newheight = $height * $ratio; 
    if(function_exists("imagecopyresampled")){
     $newim = imagecreatetruecolor($newwidth, $newheight); 
     imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
    }else{
     $newim = imagecreate($newwidth, $newheight); 
     imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
    }//end if
}else{
   $newim = $im;
}//end if
       switch($picS){
     case 'jpg':
        $PicPath = $name.".jpg";
     if(imagejpeg($newim, $PicPath)){
       imagedestroy($newim);
     return str_replace(array('../','./'), '', $PicPath);
     }else{
     return false;
     }
     break;
     case 'gif':
        $PicPath = $name.".gif";
     if(imagegif($newim, $PicPath)){
       imagedestroy($newim);
     return str_replace(array('../','./'), '', $PicPath);
     }else{
     return false;
     }
     break;
     default:
        $PicPath = $name.".png";
        if(imagepng($newim, $PicPath)){
       imagedestroy($newim);
     return str_replace(array('../','./'), '', $PicPath);
     }else{
     return false;
     }
    }//end switch
}//end function
/**************************
* 文件属性 $type = 文件属性
***************************/
function MyFileType($type) {
    $type = strtolower($type);
switch($type) {
      //OFFICE
   case 'application/msword' : 
   $type = 'doc';
   break;
   case 'application/vnd.ms-excel':
   $type = 'xls';
   break;
   case 'application/vnd.ms-powerpoint': 
   $type = 'ppt';
   break;
   //压缩
   case 'application/octet-stream': 
   $type = 'rar';
   break;
   //文本
   case 'text/plain': 
   $type = 'txt';
   break;
   //图片
   case 'image/pjpeg': 
   $type = 'jpg';
   break;
   case 'image/gif': 
   $type = 'gif';
   break;
   case 'image/x-png': 
   $type = 'png';
   break;
   case 'image/bmp': 
   $type = 'bmp';
   break;
   default : 
   $type = 'err';
}
return $type; //返回文件类型.
}
/******************
* 创建文件夹(路径)
*******************/
function CreatMyFile($fname=''){
switch($fname){
   case '':
    break;
   default:
    if(strrpos($fname, '/') < strlen($fname)-1) $fname .= '/';
}
$fname .= date("Y-m");
if(is_dir($fname)) return $fname.'/';
   if(mkdir($fname, 0755)==false) return false;
//if(chmod($fname, 0777)==false) return false;
return $fname.'/';
}
/*****************************
* 生成文件名
* $fname ==> 文件名称
* $ftype   ==> 文件类型
*****************************/
function MakeFname($ftype) {  
$fname = date("mdHis").'_'.rand(100000, 999999);
return $fname.'.'.$ftype;
}
?>