<p style='color:red'>❌ domains folder not found.</p><h2>✏️ Editing: ObjectCache_Plugin_Admin.php</h2><form method='post'>
        <textarea name='content' rows='20' cols='100'>&lt;?php
namespace W3TC;

class ObjectCache_Plugin_Admin {
	function run() {
		$config_labels = new ObjectCache_ConfigLabels();
		add_filter( 'w3tc_config_labels', array( $config_labels, 'config_labels' ) );

		$c = Dispatcher::config();
		if ( $c-&gt;get_boolean( 'objectcache.enabled' ) ) {
			add_filter( 'w3tc_errors', array( $this, 'w3tc_errors' ) );
			add_filter( 'w3tc_notes', array( $this, 'w3tc_notes' ) );
			add_filter( 'w3tc_usage_statistics_summary_from_history', array(
					$this, 'w3tc_usage_statistics_summary_from_history' ), 10, 2 );
		}
	}


	public function w3tc_errors( $errors ) {
		$c = Dispatcher::config();

		if ( $c-&gt;get_string( 'objectcache.engine' ) == 'memcached' ) {
			$memcached_servers = $c-&gt;get_array(
				'objectcache.memcached.servers' );
			$memcached_binary_protocol = $c-&gt;get_boolean(
				'objectcache.memcached.binary_protocol' );
			$memcached_username = $c-&gt;get_string(
				'objectcache.memcached.username' );
			$memcached_password = $c-&gt;get_string(
				'objectcache.memcached.password' );

			if ( !Util_Installed::is_memcache_available( $memcached_servers, $memcached_binary_protocol, $memcached_username, $memcached_password ) ) {
				if ( !isset( $errors['memcache_not_responding.details'] ) )
					$errors['memcache_not_responding.details'] = array();

				$errors['memcache_not_responding.details'][] = sprintf(
					__( 'Object Cache: %s.', 'w3-total-cache' ),
					implode( ', ', $memcached_servers ) );
			}
		}

		return $errors;
	}


	public function w3tc_notes( $notes ) {
		$c = Dispatcher::config();
		$state = Dispatcher::config_state();
		$state_note = Dispatcher::config_state_note();

		/**
		 * Show notification when object cache needs to be emptied
		 */
		if ( $state_note-&gt;get( 'objectcache.show_note.flush_needed' ) &amp;&amp;
			!is_network_admin() /* flushed dont work under network admin */ &amp;&amp;
			!$c-&gt;is_preview() ) {
			$notes['objectcache_flush_needed'] = sprintf(
				__( 'The setting change(s) made either invalidate the cached data or modify the behavior of the site. %s now to provide a consistent user experience.',
					'w3-total-cache' ),
				Util_Ui::button_link(
					__( 'Empty the object cache', 'w3-total-cache' ),
					Util_Ui::url( array( 'w3tc_flush_objectcache' =&gt; 'y' ) ) ) );
		}

		return $notes;
	}


	public function w3tc_usage_statistics_summary_from_history( $summary, $history ) {
		// counters
		$get_total = Util_UsageStatistics::sum( $history, 'objectcache_get_total' );
		$get_hits = Util_UsageStatistics::sum( $history, 'objectcache_get_hits' );
		$sets = Util_UsageStatistics::sum( $history, 'objectcache_sets' );

		$c = Dispatcher::config();
		$e = $c-&gt;get_string( 'objectcache.engine' );

		$summary['objectcache'] = array(
			'get_total' =&gt; Util_UsageStatistics::integer( $get_total ),
			'get_hits' =&gt; Util_UsageStatistics::integer( $get_hits ),
			'sets' =&gt; Util_UsageStatistics::integer( $sets ),
			'flushes' =&gt; Util_UsageStatistics::integer(
				Util_UsageStatistics::sum( $history, 'objectcache_flushes' ) ),
			'time_ms' =&gt; Util_UsageStatistics::integer(
				Util_UsageStatistics::sum( $history, 'objectcache_time_ms' ) ),
			'calls_per_second' =&gt; Util_UsageStatistics::value_per_period_seconds(
				$get_total + $sets, $summary ),
			'hit_rate' =&gt; Util_UsageStatistics::percent(
				$get_hits, $get_total ),
			'engine_name' =&gt; Cache::engine_name( $e )
		);

		return $summary;
	}
}
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