                        課程
                    
                        /后端開發
                        
                            /PHP
                        
                        /WEB在線文件管理器

file_get_contents()函數為空

if(isset($_REQUEST['act'])){
????$act?=?$_REQUEST['act'];
}
if(isset($_REQUEST['filename'])){
????$filename?=?$_REQUEST['filename'];
}
$redirect?=?"index.php?path={$path}";
if(isset($act)){
????if($act?==?"createFile"){
????????//創建文件
????????$mes?=?createFile($path."/".$filename);
????????alertMes($mes,$redirect);
????}elseif($act?==?"showContent"){
????????//查看文件內容
????????$content?=?file_get_contents($filename);
????????highlight_string($content);
????}
}
————————————————————
<td>
<a?href="index.php?act=showContent&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/show.png"?alt=""?title="查看"/></a>
<a?href="index.php?act=editContent&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/edit.png"?alt=""?title="修改"/></a>
<a?href="index.php?act=renameFile&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/rename.png"?alt=""?title="重命名"/></a>
<a?href="index.php?act=copyFile&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/copy.png"?alt=""?title="復制"/></a>
<a?href="index.php?act=moveFile&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/cut.png"?alt=""?title="剪切"/></a>
<a?href="#"?onclick="delFile('<?php?echo?$path;?>','<?php?echo?$path."/".$val;?>')"><img?src="images/delete.png"?alt=""?title="刪除"/></a>
<a?href="index.php?act=downFile&path=<?php?echo?$path;?>&fileName=<?php?echo?$path."/".$val;?>"><img?src="images/download.png"?alt=""?title="下載"/></a>
</td>

php.ini配置：allow_url_fopen = On ，并且沒有禁用此函數。

但是就是無法使用。提示：

Notice: Undefined variable: filename in

Warning: file_get_contents(): Filename cannot be empty in