Disable any email sent to the Member/User by Paid Memberships Pro

my_pmpro_disable_member_emails.php

function my_pmpro_disable_member_emails($recipient, $email)
{
	if(str_pos($email->template, "_admin") == false)			//this is not an admin email template
  		$recipient = NULL;	
	
	return $recipient;
}
add_filter("pmpro_email_recipient", "my_pmpro_disable_member_emails", 10, 2);

str_pos is not a valid function here. The correct recipe is now located here: https://gist.github.com/kimcoleman/df027dfc84e0d0bcd1b12621fa744a3b