Explain in detail please

Question

<?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>

Answer 1

The text you submit in the form will be stored in $name variable after submitting the form, later names.txt will be opened with append mode, with fwrite you write down the content in $name with new line. Then close the file.