Further exploration this is what it is doing when activated
wpmp_login<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8" />
<title>Membership Login</title><meta name="robots" content="noodp,noydir" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
see the wpmp_login before the code. Please explain why this is happening.
