一個完整的php文件上傳類實例講解

2024-05-04 23:39:52

字體：大中小

來源：轉載

供稿：網友

這篇文章主要介紹了一個完整的php文件上傳類實例，可以自定上傳文件大小與上傳文件類型及文件保存地址，需要的朋友可以參考下

這個文件上傳類可以自定上傳文件大小與上傳文件類型及文件保存地址，在使用過程中有一個問題就是如果是中文文件名進行上傳就會出現亂碼，所以大家解決辦法就是把頁面保存成uft8即可解決。

下面就是為大家分享的代碼：

<?php

define('NO_FILE', '不存在上傳文件');

define('NOT_ALLOW_EXT', '文件類型不在允許范圍內');

define('NOT_ALLOW_SIZE', '文件大小不在允許范圍內');

define('HAS_THE_FILE', '該文件已經存在');

define('UPLOAD_FAILED', '上傳失敗');

define('UPLOAD_SUCCESS', '上傳成功');

class file_uploader

{

var $_file;

var $_filesize;

var $_fileext;

var $_filedir;

var $_filename;

var $_filetmpname;

var $allowsize;

var $allowext;

var $neednewname;

var $newname;

var $syslang;

var $report;

function ready($filedir = '', $file, $allowsize = '', $allowext = '', $neednewname = false, $report = 0){

$this->_filedir = is_dir($filedir) ? $filedir : '';

if(empty($file) || !isset($file['size']) || $file['size'] == 0) $this->error(NO_FILE);

$this->_filesize = $file['size'];

$this->_filename = $file['name'];

$this->_filetmpname = $file['tmp_name'];

$this->allowsize = $allowsize;

$this->allowext = $allowext;

$this->neednewname = ($neednewname) ? true : false;

$this->newname = '';

$this->report = $report;

}

function do_upload(){

if(!is_uploaded_file($this->_filetmpname)) $this->error(NO_FILE);

if($this->chk_ext()){

$this->error(NOT_ALLOW_EXT);

return '';

}

if($this->chk_size()){

$this->error(NOT_ALLOW_SIZE);

return '';

}

if($this->neednewname) $this->newname = $this->generate_name().".".$this->get_fileext();

if($this->chk_hasfile()){

$this->error(HAS_THE_FILE);

return '';

}

$filename = empty($this->newname) ? @iconv('utf-8','gb2312',$this->_filename) : $this->newname;

@chmod($this->_filedir.$filename, 0777);

if(move_uploaded_file($this->_filetmpname, $this->_filedir.$filename)){

return $this->result();

}else{

$this->error(UPLOAD_FAILED);

return '';

}

}

function chk_ext(){

if(empty($this->allowext) || in_array($this->get_fileext(), explode("|",$this->allowext))) return false;

return true;

}

function chk_size(){

if(empty($this->allowsize) || get_filesize <= $this->allowsize*1024*1024) return false;

return true;

}

function get_filesize(){

return $this->_filesize;

}

function get_fileext(){

return substr($this->_filename,strrpos($this->_filename,".")+1);

}

function generate_name(){

return substr(md5(time()),26);

}

function chk_hasfile(){

return is_file($this->_filedir.$this->_filename);

}

function error($tip){

echo $tip;

}

function result(){

if($this->report){

$filename = empty($this->newname) ? $this->_filename : $this->newname;

$arr = array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS);

return $arr;

}else{

return UPLOAD_SUCCESS;

}

}

}

/***使用方法與參數說明***/

/***

第一個參數$dir 為上傳文件存放的路徑

第二個參數為$_FILES 為你那個上傳文件變量

第三個參數允許文件大小單位為MB

第四個參數允許的文件類型格式為jpg|png|gif

第五個參數是否需要生成新的文件名

第六個參數為返回的提示格式 0為直接提示上傳正確 1則返回一個數組array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS);

***/

//require("類文件");

//$u = new file_uploader;

//$u->ready($dir, $_FILES['upload_file'], false, false, true, 0);

//echo $u->do_upload();

?>

調用方法

代碼如下

$dir = 'upload/';

require("upload_class.php");

$u = new file_uploader;

$u->ready($dir, $_FILES['upload_file'], false, false, true, 0);

echo $u->do_upload();