[WordPress] Flush Object Cache (Memcached) & Transients - Admin buttons

WP_flush_cache_and_transients.php

<?php

// Flush Cache from Admin bar
function flush_memcache_button() {
	global $wp_admin_bar;

	// If User isnt even logged in or if admin bar is disabled
	if ( !is_user_logged_in() || !is_admin_bar_showing() )
		return false;

	// If user doesnt have the perms
	if ( function_exists('current_user_can') && false == current_user_can('activate_plugins') )
		return false;

	// Button args
	$wp_admin_bar->add_menu( array(
		'parent' => '',
		'id' => 'flush_memcache_button',
		'title' => __( 'Flush Cache' ),
		'meta' => array( 'title' => __( 'Delete memcache / WP persistent object cache' )),
		'href' => wp_nonce_url( admin_url( 'index.php?action=delcachepage'), 'flush_memcache_button' ))
	);
}
if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) ) {
	add_action( 'admin_bar_menu', 'flush_memcache_button', 35 );
}

function flush_memcache() {
	global $_wp_using_ext_object_cache;

	// Check Perms
	if ( function_exists('current_user_can') && false == current_user_can('activate_plugins') )
		return false;

	// Flush Cache
	if ( isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'delcachepage' && ( isset( $_GET[ '_wpnonce' ] ) ? wp_verify_nonce( $_REQUEST[ '_wpnonce' ], 'flush_memcache_button' ) : false ) ) {
		
		// Adapt this command line to your own memcached
		error_log(shell_exec("sudo /usr/bin/systemctl restart memcached2"));

		wp_redirect(admin_url().'?cache_type=object&cache_status=flushed');
		die();
	} else {
		wp_redirect(admin_url().'?cache_type=object&cache_status=not_flushed');
		die();
	}

}
if ( isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'delcachepage' ) {
	add_action( 'admin_init', 'flush_memcache');
}

// Flush Transients from Admin bar
function flush_transients_button() {
	global $wp_admin_bar;

	// If User isnt even logged in or if admin bar is disabled
	if ( !is_user_logged_in() || !is_admin_bar_showing() )
		return false;

	// If user doesnt have the perms
	if ( function_exists('current_user_can') && false == current_user_can('activate_plugins') )
		return false;

	// Button args
	$wp_admin_bar->add_menu( array(
		'parent' => '',
		'id' => 'flush_transients_button',
		'title' => __( 'Flush Transients' ),
		'meta' => array( 'title' => __( 'Delete all WP Transients but not persistent Object Cache (eg. memcached)' )),
		'href' => wp_nonce_url( admin_url( 'index.php?action=deltransientpage'), 'flush_transients_button' ))
	);
}
add_action( 'admin_bar_menu', 'flush_transients_button', 35 );

function flush_transients() {
	global $_wp_using_ext_object_cache;

	// Check Perms
	if ( function_exists('current_user_can') && false == current_user_can('activate_plugins') )
		return false;

	// Flush Cache
	if ( isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'deltransientpage' && ( isset( $_GET[ '_wpnonce' ] ) ? wp_verify_nonce( $_REQUEST[ '_wpnonce' ], 'flush_transients_button' ) : false ) ) {
		
    	// Get all Transients
    	global $wpdb;
    	$sql = "SELECT `option_name` AS `name`, `option_value` AS `value`
    			FROM  $wpdb->options
            	WHERE `option_name` LIKE '%transient_%'
            	ORDER BY `option_name`";
    	$get_all_site_transients = $wpdb->get_results( $sql );

		// Delete all Transients
    	foreach ($get_all_site_transients as $transient) {
			$transient_name = str_replace(array('_transient_timeout_', '_transient_', '_site_transient_', '_site_transient_timeout_'), '', $transient->name);
    		delete_transient($transient_name);
    	}

    	// If using object cache
    	if($_wp_using_ext_object_cache) {
    		// DELETE SPECIFIC CUSTOM TRANSIENTS - using a custom array
    		/*foreach ($transients_custom_array as $transients_custom) {
	    		wp_cache_delete($transients_custom);
	    	}*/
	    	wp_cache_flush();
    	}

		wp_redirect(admin_url().'?cache_type=transients&cache_status=flushed');
		die();
	} else {
		wp_redirect(admin_url().'?cache_type=transients&cache_status=not_flushed');
		die();
	}

}
if ( isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] == 'deltransientpage' ) {
	add_action( 'admin_init', 'flush_transients');
}

function flush_display_admin_msg() {
	if($_GET[ 'cache_status' ] == '')
		return;

	// Display Msg
	if ( $_GET[ 'cache_status' ] == 'flushed' ) { ?>
	    <div class="updated">
	        <p><?php echo ucwords($_GET[ 'cache_type' ]); ?> Cache was successfully flushed.</p>
	    </div>
    	<?php
	} elseif ( $_GET[ 'cache_status' ] == 'not_flushed' ) { ?>
	    <div class="error">
	        <p><?php echo ucwords($_GET[ 'cache_type' ]); ?> Cache was NOT flushed.</p>
	    </div>
    	<?php
	}
}
add_action( 'admin_notices', 'flush_display_admin_msg' );

?>