PHP上传类，分享给大家，不足之处请见谅！
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/*** 文件上传类 kangyangyang 2010-06-07* $loadfile 要上传的文件的文件域* $loadpath 文件存放路径* $loadhold 保留文件原名* $loadsize 文件大小限制 //默认是2048KB* $loadtype 文件类型限制 //默认支持 jpg|jpeg|gif|png|txt|rar|zip**/class uploadfile{private $loadfile;private $loadpath;private $loadsize;private $loadtype;private $loadhold = false;private $chkfile = true;private $file_name;private $extend_type;private $set_name;private $set_size;private $set_path;private $set_create_name;private $get_error;//构造函数function __construct($loadfile,$loadpath,$loadhold = false,$loadsize="2097152",$loadtype="jpg|jpeg|gif|png|txt|rar|zip"){ $this->loadfile = $loadfile; $this->loadpath = $loadpath; $this->loadsize = $loadsize; $this->loadtype = $loadtype; $this->loadhold = $loadhold; $this->filecheck();}//文件上传function filecheck(){ $filename = $_FILES[$this->loadfile]['name']; //文件名 $filetype = $_FILES[$this->loadfile]['type']; //文件类型 $filesize = $_FILES[$this->loadfile]['size']; //文件大小 $filepath = $_FILES[$this->loadfile]['tmp_name']; //临时文件 $fileerror= $_FILES[$this->loadfile]['error']; //错误代码 if($fileerror <= 0 && $filename != ""){ if($this->loadsize >= $filesize){ $this->set_size = $filesize; $ext = explode(".",$filename); $this->set_name = $ext; $ext_type = strtolower($ext[count($ext)-1]); $this->extend_type = $ext_type; $chk_type = explode("|",$this->loadtype); if(in_array($ext_type,$chk_type)){ $f_path = $this->get_folder(); $this->set_create_name = $createname = time().rand(1,9999); $this->file_name = $createname.".".$ext_type; if($this->loadhold){ $file_path = $f_path.$filename; $this->set_path = $file_path; }else{ $file_path = $f_path.$this->file_name; $this->set_path = $file_path; } $ckfile = move_uploaded_file($filepath,$file_path); if(!$ckfile){ $this->chefile = false; } }else{ $this->chkfile = false; } }else{ $this->chkfile = false; } }else{ $this->chkfile = false; $this->get_error = $fileerror; }}//生成的文件名function get_CreateName(){ if($this->CheckFile()){ if(!$this->loadhold){ return $this->set_create_name; } }}//返回文件夹路径function get_folder(){ if($this->CheckFile()){ if(!file_exists($this->loadpath)){ mkdir($this->loadpath,0777,true); chmod($this->loadpath,0777); } return $this->loadpath; }}//文件扩展名function get_type(){ if($this->CheckFile()){ return $this->extend_type; }}//文件名"不包括扩展名"function get_name(){ if($this->CheckFile()){ $filename = $this->set_name; unset($filename[count($filename)-1]); return implode(".",$filename); }}//返回文件大小function get_size(){ if($this->CheckFile()){ return $this->set_size; }}//返回文件全路径function get_path(){ if($this->CheckFile()){ return $this->set_path; }}//文件是否上传成功function CheckFile(){ return $this->chkfile;}//获取错误代码function get_error(){ if($this->CheckFile()){ return $this->get_error; }}}