installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/Extension_Swarmify_Core.php

@@ -0,0 +1,21 @@
+<?php
+namespace W3TC;
+
+
+
+class Extension_Swarmify_Core {
+	static public function signup_url() {
+		$email = get_bloginfo( 'admin_email' );
+		$u = wp_get_current_user();
+		$name = $u->first_name .
+			( empty( $u->first_name ) ? '' : ' ' ) .
+			$u->last_name;
+
+		return 'https://www.swarmify.com/landing/w3tc?' .
+			'email=' . urlencode( $email ) .
+			'&name=' . urlencode( $name ) .
+			'&return=' .
+			urlencode( wp_nonce_url( Util_Ui::admin_url( 'admin.php' ),	'w3tc' ) .
+				'&page=w3tc_extensions&w3tc_swarmify_set_key=set' );
+	}
+}