PHP $_POST is widely used to collect form data after submitting an HTML form
with method=“post". $_POST is also widely used to pass variables.
post method is very secure for the data submission in the form as it transfers the
data in hidden format from page to page(data not show in URL).
Program for assigning $_POST variable.
<form name=“f1” method=“post” action="<?php echo
Enter Roll<input type=“text” name=“t1”>
<input type=“submit” value=“submit”>
if ($_SERVER["REQUEST_METHOD"] == "POST")
// collect value of input field
$name = $_POST[‘t1'];