UniversalPOPGadget https://nickbloor.co.uk/2018/02/28/popping-wordpress/

UniversalPOPGadget.php

<?php
if(!class_exists("UniversalPOPGadget")) {
class UniversalPOPGadget {
	private function logEvent($event) {
		file_put_contents('UniversalPOPGadget.txt', $event . "\r\n", FILE_APPEND);
	}
	
	public function __construct() { $this->logEvent('UniversalPOPGadget::__construct()'); }
	public function __destruct() { $this->logEvent('UniversalPOPGadget::__destruct()'); }
	public function __call($name, $args) {
		$this->logEvent('UniversalPOPGadget::__call(' . $name . ', ' . implode(',', $args) . ')');
	}
	public static function __callStatic($name, $args) {
		$this->logEvent('UniversalPOPGadget::__callStatic(' . $name . ', ' . implode(',', $args) . ')');
	}
	public function __get($name) { $this->logEvent('UniversalPOPGadget::__get(' . $name . ')'); }
	public function __set($name, $value) { $this->logEvent('UniversalPOPGadget::__set(' . $name . ', ' . $value . ')'); }
	public function __isset($name) { $this->logEvent('UniversalPOPGadget::__isset(' . $name . ')'); }
	public function __unset($name) { $this->logEvent('UniversalPOPGadget::__unset(' . $name . ')'); }
	public function __sleep() { $this->logEvent('UniversalPOPGadget::__sleep()'); return array(); }
	public function __wakeup() {
		$this->logEvent('UniversalPOPGadget::__wakeup()');
		$this->logEvent("  [!] Defined classes:");
		foreach(get_declared_classes() as $c) {
			$this->logEvent("    [+] " . $c);
		}
	}
	public function __toString() { $this->logEvent('UniversalPOPGadget::__toString()'); }
	public function __invoke($param) { $this->logEvent('UniversalPOPGadget::__invoke(' . $param . ')'); }
	public function __set_state($properties) {
		$this->logEvent('UniversalPOPGadget::__set_state(' . implode(',', $properties) . ')');
	}
	public function __clone() { $this->logEvent('UniversalPOPGadget::__clone()'); }
	public function __debugInfo() { $this->logEvent('UniversalPOPGadget::__debugInfo()'); }
}}