open/edit/save text files in form text area.

I am in desparate need of a page that has a list of text files that can be edited (I can do that). The page I can't do is the one to open the chosen text file (through querystring $_GET['file']) into a form textarea field, allow it to be edited, and then saved back over the top of the existing file. Preferably it would create a backup of the file it is re-saving.

Thanks.
ralphuk100Asked:
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snoyes_jwCommented:
page1.php:

<form action="page2.php">
<input name = "fileName" type="hidden" value="<?php echo $filename?>" method="POST">
<textarea name="somecontent">
<?php
// read the file contents
$filename = $_GET['file'];
$handle = fopen($filename, 'r');
echo fread ($handle, filesize ($filename));
fclose ($handle);
?>
</textarea>
</form>


page2.php:

<?php
// backup the file
copy ($_POST'fileName'], $_POST['fileName'] . "backup");
// write over the file
$handle = fopen($filename, 'w');
fwrite($handle, $_POST['somecontent']);
fclose($handle);
?>
0

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snoyes_jwCommented:
Sorry, the method=post should go in the form tag, not the hidden input tag, and $filename won't be defined until after the $filename = $_GET['file'], so move the hidden input tag to after the text area.
0
aolXFTCommented:
I recommend adding a htmlentities() to snoyes_jw's code, since his has XSS vulnerabilities.

If you have a page with the following contents(although you shouldn't), it will cause problems:

##############################

</textarea>

<script language="javascript">
<!--
do_bad_evil_stuff();

//-->
</script>

##############################

You are going to have problems.

to get around this problem, you can htmlspecialchars the contents of the textarea.

replace

echo fread ($handle, filesize ($filename));

with

echo htmlspecialchars(fread ($handle, filesize ($filename)));
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