Core PHP: Appending to a File (8.4)

Appending to a File

Let's create an example of a form that adds filled-in data to a file.

<?php
if(isset($_POST['text'])) {
  $name = $_POST['text'];
  $handle = fopen('names.txt', 'a');
  fwrite($handle, $name."\n");
  fclose($handle);
}
?>
<form method="post">
  Name: <input type="text" name="text" />
  <input type="submit" name="submit" />
</form>

Now, each time a name is entered and submitted, it's added to the "names.txt" file, along with a new line.

The isset() function determined whether the form had been submitted, as well as whether the text contained a value.

We did not specify an action attribute for the form, so it will submit to itself.