Using filter_var to validate email addresses in PHPHowTo

As from version 5.2, PHP comes with built-in data filtering. Which makes validating emails and URL very, very easy.

Validating email addresses in PHP

It couldn't be easier than this, could it?

function valid_email( $str=false )	{
	if( !$str )	{
		return false;
	}
	if(filter_var($str, FILTER_VALIDATE_EMAIL))	{
		return true;
	}	else	{
		return false;
	}
}

You can do much more with the new PHP filtering functions, this is all I've got time for now.