前两天想着用ftp来做一个php的文件上传。始终都明白，就是传不上服务器。以后有时间有待解决。做了一个http原理的。
<?php
session_start();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>文件上传</title>
<style type="text/css">
td{ font-size:13px; line-height:24px;}
</style>
<script type="text/javascript">
function upload()
{
var uname=document.uploadForm.uname.value;
var upwd=document.uploadForm.upwd.value;
var uimg=document.uploadForm.uimg.value;
var end=new String (uimg.substring(uimg.lastIndexOf(".")+1,uimg.length));
if(uname=='')
{
alert("请输入用户名！");
uploadForm.uname.focus();
return false;
}
else if(upwd=='')
{
alert("请输入密码！");
uploadForm.upwd.focus();
return false;
}
else if(uimg=='')
{
alert("请浏览头像！");
return false;
}
else if(end!='jpg'&&end!='png'&&end!='gif'&&end!='bmp'&&end!='')
{
alert("上传文件格式有误，只能上传图片格式，请核实！");
return false;
}
return true;
}
</script>
</head>
<body>
<form name="uploadForm" id="uploadForm" action="upd.php?action=upload" method="post" enctype="multipart/form-data">
<table cellpadding="0" cellspacing="5" border="0" width="600">
<tr>
<td>用户名</td><td><input type="text" name="uname" id="uname" value="<?php echo $_SESSION['uname']?>"/></td>
</tr>
<tr>
<td>密码</td><td><input type="text" name="upwd" id="upwd" value="<?php echo $_SESSION['upwd']?>"/></td>
</tr>
<tr>
<td>头像</td><td><input type="file" name="uimg" id="uimg"/></td>
</tr>
<tr>
<td><input type="submit" name="sbt" value="提交" onclick="return upload()"/></td>
<td><input type="button" name="bt" value="重填"/></td>
</tr>
</table>
</form>
<?php
$action=$_GET['action'];
if($action=='upload')
{
date_default_timezone_set('PRC');
$Path="./upload/";
if (!is_dir($Path))//创建路径
{
mkdir($Path);
}
$result=0;
if ($_FILES["uimg"]["size"]!=0&&$_FILES["uimg"]["size"]<1024*1024)
{
$File=$Path.date('YmdHis')."_".$_FILES["uimg"]["name"];
if(move_uploaded_file($_FILES['uimg']['tmp_name'],iconv('UTF-8','gb2312',$File)))//iconv(....,$File)防止中文乱码 {
$result=1;
}
else
{
$result=2;
}
}
else
{
$result=3;
}
if($result!=1)
{
$_SESSION['uname']=$_POST['uname'];
$_SESSION['upwd']=$_POST['upwd'];
$message="上传失败！";
if($result==3)
{
$message="图片不能超过1MB，请核实！";
}
?>
<script type="text/javascript">
alert('<?php echo $message?>');
location.href='upd.php';
</script>
<?php
}
else
{
//正确，处理。。。。。。
}
}
?>
</body>
</html>