WordPress at a glance
function is not described

Plugin_Upgrader::bulk_upgrade() WP 2.8.0

Bulk upgrade several plugins at once.

This is a method of the class: Plugin_Upgrader

Hooks from the method
Return

Array/false. An array of results indexed by plugin file, or false if unable to connect to the filesystem.

Usage

$Plugin_Upgrader = new Plugin_Upgrader();
$var = $Plugin_Upgrader->bulk_upgrade( $plugins, $args );
$plugins(string[]) (required)
Array of paths to plugin files relative to the plugins directory.
$args(array)

Other arguments for upgrading several plugins at once.

  • $clear_update_cache (true/false)
    Whether to clear the plugin updates cache if successful.
    Default: true

Default: array()

Changelog

Since 2.8.0 Introduced.
Since 3.7.0 The $args parameter was added, making clearing the plugin update cache optional.

Code of Plugin Upgrader::bulk upgrade: wp-admin/includes/class-plugin-upgrader.php WP 5.4.1

<?php
public function bulk_upgrade( $plugins, $args = array() ) {

	$defaults    = array(
		'clear_update_cache' => true,
	);
	$parsed_args = wp_parse_args( $args, $defaults );

	$this->init();
	$this->bulk = true;
	$this->upgrade_strings();

	$current = get_site_transient( 'update_plugins' );

	add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ), 10, 4 );

	$this->skin->header();

	// Connect to the filesystem first.
	$res = $this->fs_connect( array( WP_CONTENT_DIR, WP_PLUGIN_DIR ) );
	if ( ! $res ) {
		$this->skin->footer();
		return false;
	}

	$this->skin->bulk_header();

	/*
	 * Only start maintenance mode if:
	 * - running Multisite and there are one or more plugins specified, OR
	 * - a plugin with an update available is currently active.
	 * @todo For multisite, maintenance mode should only kick in for individual sites if at all possible.
	 */
	$maintenance = ( is_multisite() && ! empty( $plugins ) );
	foreach ( $plugins as $plugin ) {
		$maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin ] ) );
	}
	if ( $maintenance ) {
		$this->maintenance_mode( true );
	}

	$results = array();

	$this->update_count   = count( $plugins );
	$this->update_current = 0;
	foreach ( $plugins as $plugin ) {
		$this->update_current++;
		$this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true );

		if ( ! isset( $current->response[ $plugin ] ) ) {
			$this->skin->set_result( 'up_to_date' );
			$this->skin->before();
			$this->skin->feedback( 'up_to_date' );
			$this->skin->after();
			$results[ $plugin ] = true;
			continue;
		}

		// Get the URL to the zip file.
		$r = $current->response[ $plugin ];

		$this->skin->plugin_active = is_plugin_active( $plugin );

		$result = $this->run(
			array(
				'package'           => $r->package,
				'destination'       => WP_PLUGIN_DIR,
				'clear_destination' => true,
				'clear_working'     => true,
				'is_multi'          => true,
				'hook_extra'        => array(
					'plugin' => $plugin,
				),
			)
		);

		$results[ $plugin ] = $this->result;

		// Prevent credentials auth screen from displaying multiple times.
		if ( false === $result ) {
			break;
		}
	} // End foreach $plugins.

	$this->maintenance_mode( false );

	// Force refresh of plugin update information.
	wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );

	/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
	do_action(
		'upgrader_process_complete',
		$this,
		array(
			'action'  => 'update',
			'type'    => 'plugin',
			'bulk'    => true,
			'plugins' => $plugins,
		)
	);

	$this->skin->bulk_footer();

	$this->skin->footer();

	// Cleanup our hooks, in case something else does a upgrade on this connection.
	remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ) );

	return $results;
}