PHP textfile editor

[MarlonVets]

Hello everyone, I am having a problem with some php code in a webpage. It is not functioning as it should. The basic purpose of the page is to edit a text file stored in the same directory, the text file contains ID numbers in a one per line format (eg attached). The page should allow searching for a ID number, then give the option to delete it if it is found or ADD if it is not in the database using the respective button that should be shown based on the case. The page does not search now and shows a part of the code when opened in a browser. PLEASE HELP ME!

editor.php

mydata.txt

[QuickOldCar]

On line 39 you have this:

<form action="editor.php" method="post"></form>

 

You basically ended the form without inserting anything into it.

edit line 39 like this:
<form action="editor.php" method="post">

 

and on line 51 add </form>:
<input type="submit" value="Search" name="search" id="search">

</form>