Answer by Sebastian for Deleting Line from text file php

One approach could be to query the server with the string to be removed if no line can be equal to another one, e.g., delete.php?str=<your string> and do the deletion of that string (note that I said 'string' not line).

If it's possible for lines to be equal, you should identify the lines and follow a similar approach: delete.php?line=<number>.

This should be easy and you could write a flexible code that deletes lines from a giving file by also passing the filename.

Edit: Example provided following the advise of using a hidden field.

<?php$html = "<form id='form' method='post' action='delete.php'>";foreach(array("line 1", "line 2", "line 3") as $key => $value ) {    $html .= "<span>${value}</span>";    $html .= "<input type='hidden' name='lineNumber' value='${key}'>";    $html .= "<input type='submit' value='Delete' name='line'><br>";}$html .= "</form>";echo $html;?>

In your delete.php get the content of $_POST['lineNumber'] to retrieve the line number.