formhandler.class.php

<?php

	
	interface IFormHandler
	{
		public function validate();
	}

	class FormHandler 
	{
		const METHOD_GET = 2;
		const METHOD_POST = 4;

		protected $_request = [];
		protected $_fields = [];
		protected $_optional = [];

		protected $_method = self::METHOD_GET;

		public function __construct(array $request = [], $method = self::METHOD_GET)
		{
			$this->_request = $request;
			$this->_method = $method;
		}
	}

	class ContactForm extends FormHandler
	{
		protected $_fields = ['fname', 'lname', 'email', 'salutation', 'title'];
		protected $_optional ['salutation', 'title'];

		public function validate()
		{
			//validation as discussed here
		}
	}