wp-clean-cache-after-critical-action.php

<?php

// these are the hooks sg-cachepress uses
add_action( 'upgrader_process_complete', 'clean_cache_after_critical_action' );
add_action( 'automatic_updates_complete', 'clean_cache_after_critical_action' );
add_action( '_core_updated_successfully', 'clean_cache_after_critical_action' );
// this has been found in litespeed-cache
add_action( 'admin_action_do-plugin-upgrade', 'clean_cache_after_critical_action' );

function clean_cache_after_critical_action() {
	// wp-rocket is more specific in rocket_reset_opcache()
	// wp does it using opcache_invalidate to delete only updated files
	// @see https://github.com/WordPress/WordPress/commit/dd11076dc7867c985ab683462051929990105fbc
	// but: it failed on 2021-04 updating WordPress SEO
	if ( function_exists( 'opcache_reset' ) && ini_get( 'opcache.enable' ) ) {
		opcache_reset();
	}

	// $ wp cache flush
	// it's probably already done somewhere
	// but: it failed on 2021-03 updating to WP 5.7
	if ( function_exists( 'wp_cache_flush' ) ) {
		wp_cache_flush();
	}
}