PHP上传小问题

Question

先来看看上传代码
$upload_dir=="./site_data/bak/";
$upload_bak="./site_data/";$file=$_FILES['upload'];
$_SESSION['adminuser']="wang";$ext = explode(".",$file['name']);
$ext = $ext[count($ext)-1];  
$filename1 = substr($file['name'],0,(strlen($file['name'])-strlen($ext)-1));              
$bakfilename = $filename1."_{$uid}_$_SESSION[adminuser]_".date("Y_m_d_H_i_s").".{$ext}";
if(move_uploaded_file($file['tmp_name'],$upload_bak.$file['name'])){
copy($upload_bak.$file['name'], $upload_bak.$bakfilename); 
echo "<script>alert('上传成功');</script>";
}
比如当我上传 文件 名子为aaa时，我要把aaa上传到文件夹site_data中，而且我还要备份文件aaa，并且把备份文件名改为
$bakfilename = $filename1."_{$uid}_$_SESSION[adminuser]_".date("Y_m_d_H_i_s").".{$ext}";备份文件放在site_data文件夹里的bak文件夹里，怎么放

Answer 1

$upload_dir=="./site_data/";
$upload_bak="./site_data/bak/";$file=$_FILES['upload'];
$_SESSION['adminuser']="wang";$ext = explode(".",$file['name']);
$ext = $ext[count($ext)-1];  
$filename1 = substr($file['name'],0,(strlen($file['name'])-strlen($ext)-1));              
$bakfilename = $filename1."_{$uid}_$_SESSION[adminuser]_".date("Y_m_d_H_i_s").".{$ext}";
if(move_uploaded_file($file['tmp_name'],$upload_dir.$file['name'])){
copy($upload_dir.$file['name'], $upload_bak.$bakfilename); 
echo "<script>alert('上传成功');</script>";
}

Answer 2

这样写只上传了$bakfilename = $filename1."_{$uid}_$_SESSION[adminuser]_".date("Y_m_d_H_i_s").".{$ext}";
这个site_data文件夹下并没有文件啊
如 上传aaa ，site_data里有aaa，site_data的bak文件里有aaa_wang_"时间"

Answer 3

if(move_uploaded_file($file['tmp_name'],$upload_dir.$file['name'])){//这步是上传到$upload_dir=="./site_data/";下
copy($upload_dir.$file['name'], $upload_bak.$bakfilename); //这步是复制到$upload_bak="./site_data/bak/";下
按逻辑来说应该是第一步执行成功了，才会有第二步的。前面发的代码我改了变量名字的哈，仔细看下。

Answer 4

复制的那步没有错，是复制到bak下了,可第一步并没有在site_data下，而是在它外面了

Answer 5

那你只有检查下$upload_dir.$file['name']相对你这个php页面的路径了

Answer 6

打印出：$upload_dir.$file['name']看下对不对

Answer 7

打印完就出现这个
X-Powered-By: PHP/5.2.5
Content-type: text/html<title>文件上传</title><form enctype="multipart/form-data" action="" method="post">
<table width="400" border="0" cellspacing="1" cellpadding="1" align="center" bgcolor="#E6E6E6" >
    <tr> 
      <td height="22" align="center" valign="middle" bgcolor="#F5F5F5" width="400">&nbsp;文件上传      </td>
    </tr>
    <tr align="center" valign="middle"> 
      <td align="left"  height="40" width="400" bgcolor="#FFFFFF"> 
  &nbsp;&nbsp;选择文件:<input type="file" name="upload"  style="width:300">
</td></tr>
  
    <tr align="center" valign="middle"> 
      <td bgcolor="#F5F5F5" height="24" width="400"> 
    <div align="center">
          <input type="submit"  value="开始上传">
      </div></td>
    </tr>
  </table>
</form>

Answer 8

<?php
$upload_dir="./a/b/";
$upload_bak="./a/";
/*if(! is_dir("./a/b/"))
 { 
  mkdir("./a/b/");
  @chmod("./a/b/",777);
 }*/
 //$location="./a/b/";$file=$_FILES['upload'];
$_SESSION['adminuser']="wang";
//print_r($file);
$ext = explode(".",$file['name']);//test.txt
$ext = $ext[count($ext)-1];  //txt
$filename1 = substr($file['name'],0,(strlen($file['name'])-strlen($ext)-1));              
$bakfilename = $filename1."_{$uid}_$_SESSION[adminuser]_".date("Y_m_d_H_i_s").".{$ext}";
if(move_uploaded_file($file['tmp_name'],$upload_dir.$file['name'])){
copy($file['name'], $upload_bak.$bakfilename); 
echo "<script>alert('上传成功');</script>";
}else{
echo "<script>alert('Fail!');</script>";
echo $file['name']," -- ",$upload_dir;
}
?>