Clears PHP OpCache when visiting the Plugins admin screen (wp-admin/plugins.php).

clear-opcache-simple.php

<?php
/**
 * Clear OpCache Simple.
 *
 * @author    Felix Arntz, Google
 * @license   Apache 2.0
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Clear OpCache Simple
 * Description: Clears PHP OpCache when visiting the Plugins admin screen (wp-admin/plugins.php).
 * Plugin URI:  https://gist.github.com/felixarntz/cc2a33e9dc01874c6a4cffffc1b19efb
 * Version:     0.1.0
 * Author:      Felix Arntz, Google
 * Author URI:  https://felix-arntz.me
 * License:     Apache License 2.0
 * License URI: https://www.apache.org/licenses/LICENSE-2.0
 */

add_action(
	'current_screen',
	function( $screen ) {
		if ( 'plugins' !== $screen->id ) {
			return;
		}
		
		if ( ! function_exists( 'opcache_reset' ) ) {
			return;	
		}
		
		opcache_reset();
	}
);