Edit a file with a form

[driveflexfuel]

I have a file that i wish to edit using a form. I only want to load and edit a specific portion of the page. If anyone can help with this I thank you ahead of time.

This is what the code looks like

coding here

<!--Load from here-->
This is the editable portion of the page i wish to load into the form
<!--Load to here-->

more coding here

[VPmase]

One way you can do it is by using multiple files and only loading the editable file. That would probably be the easiest and fastest way.

[garrettroyce]

One way you can do it is by using multiple files and only loading the editable file. That would probably be the easiest and fastest way.

This is a good way to do it. Also, when you edit a file, depending on how you open the file, it may only be accessible to one person at a time. So, if you plan on making a file editable by more than one user at once, the users may get an error if someone is already editing it. This also includes you, if you are trying to edit a file using the same file, as VPmase mentioned :P

I usually save all writing until the very last possible moment to minimize the file locking problems. Also, using fclose() when you don't need a file handle and closing any open resources can help minimize this problem as well.

[gomarc]

<?php
 
//Variables to edit
$filename = "file2edit.txt"; //File to edit
$startmark= "<!--Load from here-->";
$endmark  = "<!--Load to here-->";
 

$source = file_get_contents($filename)
  or exit("</br>Problem reading <b>'".$filename."'</b> (check file name)");
  
$fstart = strpos($source, $startmark) 
  or exit("</br>Error: Start mark on file not found");
$fstart = $fstart + strlen($startmark);  

$fend = strpos($source, $endmark) 
  or exit("</br>Error: End mark on file not found");  

//Split the file
$part1 = substr($source, 0, $fstart);
$part2 = substr($source, $fstart , ($fend-$fstart));
$part3 = substr($source, $fend , (strlen($source)-$fend));

?>

<FORM METHOD="POST" ACTION="save_changes.php">

<P>Edit your file <?=$filename?>:<br>

<TEXTAREA NAME="part2" COLS=80 ROWS=15 WRAP=virtual>
<?=$part2?>
</TEXTAREA></P>
<input type="hidden" name="fname" value="<?=$filename?>">
<input type="hidden" name="part1" value="<?=$part1?>">
<input type="hidden" name="part3" value="<?=$part3?>">

<P><INPUT TYPE="submit" NAME="submit" VALUE="Save Changes"></P>

</FORM>

And the file save_changes.php is

<?php

IF (ISSET($_POST['fname']))
{

  $Newfile = $_POST['part1'] . $_POST['part2'] . $_POST['part3'];

  $file = fopen($_POST['fname'],"w");
  fwrite($file,$Newfile);
  fclose($file);

  echo "<br>Changes to file <b>".$_POST['fname']."</b> have been saved";

}
else
{
  echo "<br>Nothing done";
}

?>