上传类库
<?php
class upload {
protected $allowExt = array('jpg','jpeg','gif','png','bmp');
protected $allowSize = 1; // 最大上传大小,单位为M
protected $errno = 0;
protected $error = array(
0=>'上传完成',
1=>'文件超出upload_max_filesize',
2=>'文件超出表单中 MAX_FILE_SIZE 选项指定的值',
3=>'文件只有部分被上传',
4=>'没有文件被上传',
6=>'找不到临时目录',
7=>'文件定入失败',
8=>'文件大小超出配置文件的限制',
9=>'不允许的文件类型',
10=>'创建目录失败',
11=>'未知错误,反思中'
);
// 获取后缀
protected function getExt($file) {
$ext = strtolower(strrchr($file,'.'));
return $ext;
}
// 检验后缀
protected function checkExt($ext) {
return in_array(ltrim($ext,'.'),$this->allowExt);
}
// 检验大小
protected function checkSize($size) {
return $size <= $this->allowSize * 1000 * 1000;
}
// 按日期生成目录
protected function mk_dir() {
$dir = date('Y/m/d',time());
$dir = ROOT . 'data/p_w_picpaths/' . $dir;
if(!is_dir($dir)) {
if(!mkdir($dir,0777,true)) {
return false;
}
}
return $dir;
}
// 生成随机文件名
protected function randName($n = 6) {
if($n <= 0) {
return '';
}
$str = 'abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ0123456789';
$str = substr(str_shuffle($str),0,$n);
return $str;
}
public function up($name) {
// $_FILES里面有没有$name指定的单元
if(!isset($_FILES[$name])) {
return false;
}
$f = $_FILES[$name];
// 判断错误码,是否上传成功
if(($this->errno = $f['error']) > 0) {
return false;
}
// 判断大小
if(!$this->checkSize($f['size'])) {
$this->errno = 8;
return false;
}
// 判断类型
$ext = $this->getExt($f['name']);
if(!$this->checkExt($ext)) {
$this->errno = 9;
return false;
}
// 上传,返回路径
$path = $this->mk_dir();
if(!$path) {
$this->errno = 10;
return false;
}
$filename = $this->randName(6);
$path = $path . '/' . $filename . $ext;
if(!move_uploaded_file($f['tmp_name'],$path)) {
$this->errno = 11;
return false;
}
$path = str_replace(ROOT,'',$path);
return $path;
}
// 获取错误的接口
public function getErr() {
return $this->error[$this->errno];
}
// 设置允许的后缀
public function setExt($arr) {
$this->allowExt = $arr;
}
// 设置最大上传值
public function setSize($num=2) {
$this->allowSize = $num;
}
}
/*
define('ROOT','D:/www/0713/');
$upload = new upload();
if($path = $upload->up('pic')) {
echo $path,'<br />';
echo '上传成功';
} else {
echo $upload->getErr();
}
*/