文件上傳是項目開發中比較常見的功能，但文件上傳的過程比較繁瑣，只要是有文件上傳的地方就需要編寫這些復雜的代碼。為了能在每次開發中降低功能的編寫難度，也為了能節省開發時間，通常我們都會將這些反復使用的一段代碼封裝到一個類中。
<?php
/**
+-----------------------------------------------------------------------------
* 文件上傳類
+-----------------------------------------------------------------------------
* @author Administrator
+-----------------------------------------------------------------------------
*/
class FileUpload{
private $filepath; //保存路徑
private $allowtype=array('gif','jpg','jpeg','png','txt');
private $maxsize=1000000; //最大允許上傳大小
private $israndname=true; //是否隨機
private $orginame; //原始文件名
private $tmpname; //臨時文件名
private $newname; //新文件名
private $filetype; //文件類型
private $filesize; //文件大小
private $errornum=''; //錯誤號
private $errormsg; //錯誤信息
/**
+------------------------------------------------------------------------------
*構造函數
+------------------------------------------------------------------------------
* @param string $savepath 保存路徑
* @param string $allowtype 允許類型
* @param string $maxsize 允許大小
*
+------------------------------------------------------------------------------
*/
function __construct($option=array()){
foreach ($option as $key=>$value){
if (!in_array($key,get_class_vars(get_class($this)))){
continue;
}
$this->setOption($key, $value);
}
}
function uploadfile($field) {
$return=true;
if (!$this->CheckPath()) {
$this->errormsg=$this->geterrorNum();
return false;
}
$name=$_FILES[$field]['name'];
$tmpname=$_FILES[$field]['tmp_name'];
$filesize=$_FILES[$field]['size'];
$error=$_FILES[$field]['error'];
if (is_array($name)) {
$errors=array();
for ($i=0;$i<count($name);$i++){
if ($this->getFile($name[$i],$tmpname[$i],$filesize[$i],$errors[$i])) {
if (!$this->CheckSize() && !$this->CheckType()) {
$errors=$this->getErrorNum();
return false;
}
}else{
$errors=$this->getErrorNum();
return false;
}
if (!$return) {
$this->getFile();
}
}
if ($return) {
$fileNames=array();
for ($i=0;$i<count($name);$i++){
if ($this->getFile($name[$i], $tmpname[$i], $filesize[$i], $filesize[$i])) {
$this->SetFileName();
if (!$this->MoveFile()) {
$errors[]=$this->getErrorNum();
$return=false;
}else{
$fileNames[]=$this->getNewName();
}
}
}
$this->newname=$fileNames;
}
$this->errormsg=$errors;
return $return;
}else{
if($this->getFile($name,$tmpname,filesize,$error)){
if(!$this->CheckSize()){
return false;
}
if(!$this->CheckType()){
return false;
}
$this->SetFileName();
if ($this->MoveFile()) {
return true;
}
}else{
return false;
}
if (!$return) {
$this->setOption('ErrorNum', 0);
$this->errormsg=$this->geterrorNum();
}
return $return;
}
}
/**
+------------------------------------------------------------------------
*設置類屬性值函數
+------------------------------------------------------------------------
* @param mix $key
* @param mix $value
*/
private function setOption($key,$value){
$key=strtolower($key);
$this->$key=$value;
}
/**
+---------------------------------------------------------------------------
* 獲取文件變量參數函數
+---------------------------------------------------------------------------
* @param string $name
* @param string $tmp_name
* @param number $size
* @param number $error
*/
private function getFile($name,$tmpname,$filetype,$filesize,$error=0){
$this->setOption('TmpName', $tmpname);
$this->setOption('OrgiName', $name);
$arrstr=explode('.', $name);
$this->setOption('FileType', $arrstr[count($arrstr)-1]);
$this->setOption('FileSize', $filesize);
return true;
}
/**
+-------------------------------------------------------------------------
* 檢查上傳路徑函數
+-------------------------------------------------------------------------
* @return boolean
*/
private function CheckPath(){
if(empty($this->filepath)){
$this->setOption('ErrorNum', -5);
return false;
}
if (!file_exists($this->filepath)||!is_writable($this->filepath)) {
if (!@mkdir($this->filepath,0755)) {
$this->setOption('ErrorNum',-4);
return false;
}
}
return true;
}
private function Is_Http_Post(){
if (!is_uploaded_file($this->tmpname)) {
$this->setOption('ErrorNum',-6);
return false;
}else{
return true;
}
}
/**
+--------------------------------------------------------------------
*檢查文件尺寸函數
+--------------------------------------------------------------------
* @return boolean
*/
private function CheckSize(){
if ($this->filesize>$this->maxsize) {
$this->setOption('ErrorNum', -2);
return false;
}else{
return true;
}
}
/**
+---------------------------------------------------------------
* 檢查文件類型函數
+---------------------------------------------------------------
* @return boolean
*/
private function CheckType(){
if (in_array($this->filetype, $this->allowtype)) {
return true;
}else{
$this->setOption('ErrorNum', -1);
return false;
}
}
private function SetFileName(){
if ($this->israndname) {
$this->setOption('NewName', $this->RandName());
}else{
$this->setOption('NewName',$this->orginame);
}
}
/**
+-----------------------------------------------------------------
* 獲取新文件名
+------------------------------------------------------------------
*/
public function getNewName() {
return $this->newname;
}
private function RandName(){
$rule=date("YmdHis").rand(0, 999);
return $rule.'.'.$this->filetype;
}
private function MoveFile(){
if ($this->errornum) {
$filepath=rtrim($this->filaepath,'/').'/';
$filepath.=$this->newname;
if (@move_uploaded_file($this->tmpname,$filepath)) {
return true;
}else{
$this->errormsg=$this->setOption('ErrorNum',-3 );
}
}else{
return false;
}
}
/**
+----------------------------------------------------------------
* 錯誤信息函數
+----------------------------------------------------------------
* @return string
*/
function getErrorNum() {
$erstr="上傳文件<font color='red'>{$this->orginame}</font>出錯";
switch ($this->errornum) {
case 4:
$erstr.="沒有文件被上傳";
break;
case 3:
$erstr.="文件只被部分上傳";
break;
case 2:
$erstr.="上傳文件超過了HTML表單MAX_FILE_SIZE指定的值";
break;
case 1:
$erstr.="上傳文件超過了php.ini配置文件中upload_max_filesize的值";
break;
case 0:
$erstr="上傳{$this->orginame}成功";
break;
case -1:
$erstr="未允許的類型";
break;
case -2:
$erstr.="文件過大，不能超過{$this->maxsize}個字節";
break;
case -3:
$erstr.="上傳失敗";
break;
case -4:
$erstr="創建上傳目錄失敗，請重新指定上傳目錄";
break;
case -5:
$erstr="未指定上傳路徑";
break;
case -6:
$erstr="非法操作";
break;
default:
$erstr.="未知錯誤";
}
return $erstr;
}
}
?>
以上就是本文的全部內容，希望對大家學習php程序設計有所幫助。
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