Email Verfication

[NoobLaPHP]

Ok, i am having a load of people register to a subscription service on my website using invalid emails. I would like to add a function in that can read an email. If the source is right it will continue to process the form. If it's not then it shows an error message.

 

Would i use something like an explode function to seperate using the @ in an email and read the end part(live.co.uk) and then have an array set up to see if the end is in the email or what? 

 

Examples would be a great help if you have any other ideas.

 

Thanks

[NoobLaPHP]

I have found this that seems to work well.

function domain_exists( $email, $record = 'MX' ) {
	list( $user, $domain ) = explode( '@', $email );
	return checkdnsrr( $domain, $record );
}


if(domain_exists('user@davidwalsh.name')) {
	echo('This MX records exists; I will accept this email as valid.');
}
else {
	echo('No MX record exists;  Invalid email.');
}

Source: http://davidwalsh.name/php-email-validator

[cyberRobot]

For what it's worth, PHP has a built-in function for validating things like email addresses:

http://www.php.net/manual/en/filter.examples.validation.php