php之文件上传类代码
[php]
/*
单个文件上传
功能
上传文件
配置允许的后缀
配置允许的大小
获取文件后缀
判断文件的后缀
报错
*/
class UpTool{
protected $allowExt = 'jpg,jpeg,gif,bmp,png';
protected $maxSize = 1; //1M ,以M为单位
protected $file = null; //准备储存上传文件信息
protected $errno = 0; //错误代码
protected $error = array(
0=>'无错',
1=>'上传文件大小超出系统限制',
2=>'上传文件的大小超出网页表单限制',
3=>'文件只有部分被上传',
4=>'没有文件被上传',
6=>'找不到临时文件夹',
7=>'文件写入失败',
8=>'不允许的文件后缀',
9=>'文件大小超出类的允许范围',
10=>'创建目录失败',
11=>'文件移动失败'
);
/*
上传
*/
public function up($key) {
if (!isset($_FILES[$key])) {
return false;
}
$f = $_FILES[$key];
//检验上传是否成功
if ($f['error']) {
$this->errno = $f['error'];
return false;
}
//获取后缀
$ext = $this->getExt($f['name']);
//检查后缀
if (!$this->isAllowExt($ext)) {
$this->errno = 8;
return false;
}
//检查大小
if (!$this->isAllowSize($f['size'])) {
$this->errno = 9;
return false;
}
//创建目录
$dir = $this->mk_dir();
if ($dir == false) {
$this->errno = 10;
return fasle;
}
//生成随机文件名
$newname = $this->randName() . '.' .$ext;
//$dir = $dir . '/' .$newname;
//移动
if(!move_uploaded_file($f['tmp_name'], $dir . '/' .$newname)) {
$this->errno = 11;
return false;
}
return true;//str_replace(ROOT, '', $dir);
}
public function getErr(){
return $this->error[$this->errno];
}
/*
parm string $exts 允许的后缀
自动添加 允许的后缀,和文件的大小
*/
public function setExt($exts) {
$this->allowExt = $exts;
}
public function setSize($num) {
$this->maxSize = $num;
}
/*
string $file
return string $ext 后缀
*/
protected function getExt($file) {
$tmp = explode('.', $file);
return end($tmp);
}
/*
string $ext 文件后缀
return bool
防止大小写的问题
*/
protected function isAllowExt($ext) {
return in_array(strtolower($ext), explode(',', strtolower($this->allowExt))) ;
}
/*
检查文件的大小
*/
protected function isAllowSize($size) {
return $size maxSize *1024*1024;
}
//按日期创建目录的方法
protected function mk_dir() {
$dir = 'images/' . date('Ym/d');
if(is_dir($dir) || mkdir($dir,0777,true)) {
return $dir;
} else {
return false;
}
}
/*
生成随机文件名
*/
protected function randName($length = 6) {
$str = 'abcdefghijkmnpqrstuvwxyz23456789';
return substr(str_shuffle($str),0,$length);
}
}
form 表单
[html]
另起页面调用
[php]
require('./UpTool.class.php');
$uptool = new UpTool();
$uptool->setExt('rar,doc');
$uptool->setSize(1);
if ($uptool->up('pic')) {
echo '上传成功';
} else {
echo '失败';
echo $uptool->getErr();
}

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