form validation php year code example

Example 1: php input time validation

preg_match("/^(?:2[0-4]|[01][1-9]|10):([0-5][0-9])$/", $foo)

Example 2: data validation of $_POST in php

<?php
	
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
	
		// the request method is fine

} else {

	exit('Invalid Request');

}