php实现大文件上传源代码_php教程 | PHP之友

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php实现大文件上传源代码

　　经典php实现大文件上传源代码：

　　一个比较经典的php大文件上传源代码,可成功运行.

function function_upload($name,$newname="",$dir="upload")
{
global $_FILES,$ext;

$return="";

$time=time();

$upload=trim($_FILES[$name][’tmp_name’]);

$upload_name=trim($_FILES[$name][’name’]);

$size=trim($_FILES[$name][’size’]);

if(empty($upload) or empty($upload_name) or $size==0)
{
  return $return;
}

$dir.="/".date("Y-m",$time);

if (is_uploaded_file($upload))
{
  $ext=file_extension($upload_name);

  if(liu_mkdir($dir))
  {

   if($newname!="")
   {

    $newname.=".".$ext;
    //$newname=TIME_NOW.".".$ext;
   }else{
    //$newname=$upload_name;
    $newname=$time.".".$ext;
   }

   if(move_uploaded_file($upload,$dir."/".$newname) and file_exists($dir."/".$newname))
   {
    chmod($dir."/".$newname,0755);
    $return=$dir."/".$newname;
   }
  }

}

return $return;

}

function file_extension($filename)
{
return substr(strrchr($filename, ’.’), 1);
}

function liu_mkdir($dir,$mode=0777)
{
if(is_dir($dir))
{

  if(!is_writable($dir))
  {

   @chmod($dir,$mode);

  }
  return true;
}
else

{

  $oldmask = @umask(0);

  $partialpath = dirname($dir);

  if(!liu_mkdir($partialpath,$mode))
  {

   return false;

  }
  else

  {
   return mkdir($dir,$mode);
  }

}
}

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