文件上传

<?php
if($_FILES['pic']['error']==0){
$pic = $_FILES['pic'];
$flag = move_uploaded_file($pic['tmp_name'],'./'.mk_dir().'/'.randName().'.'.getExt($pic['name']));
if($flag)
}
function randName(){
$str = 'abcdefghijkmnpqrstuvwxzy23456789';
return    substr(str_shuffle($str),0,6);
}
function mk_dir(){
$dir = date('md/i',time());
if(!is_dir('./'.$dir)){
mkdir('./'.$dir,0777,true);
}
return $dir;
}
function getExt($file){
$tmp = explode('.',$file);
return end($tmp);
}
?>