wp_version_check( array $extra_stats = array(), bool $force_check = false )

Check WordPress version against the newest version.


Description Description

The WordPress version, PHP version, and Locale is sent. Checks against the WordPress server at api.wordpress.org server. Will only check if WordPress isn’t installing.


Parameters Parameters

$extra_stats

(array) (Optional) Extra statistics to report to the WordPress.org API.

Default value: array()

$force_check

(bool) (Optional) Whether to bypass the transient cache and force a fresh update check. Defaults to false, true if $extra_stats is set.

Default value: false


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Source Source

File: wp-includes/update.php

function wp_version_check( $extra_stats = array(), $force_check = false ) {
	if ( wp_installing() ) {
		return;
	}

	global $wpdb, $wp_local_package;
	// include an unmodified $wp_version
	include( ABSPATH . WPINC . '/version.php' );
	$php_version = phpversion();

	$current = get_site_transient( 'update_core' );
	$translations = wp_get_installed_translations( 'core' );

	// Invalidate the transient when $wp_version changes
	if ( is_object( $current ) && $wp_version != $current->version_checked )
		$current = false;

	if ( ! is_object($current) ) {
		$current = new stdClass;
		$current->updates = array();
		$current->version_checked = $wp_version;
	}

	if ( ! empty( $extra_stats ) )
		$force_check = true;

	// Wait 60 seconds between multiple version check requests
	$timeout = 60;
	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
	if ( ! $force_check && $time_not_changed ) {
		return;
	}

	/**
	 * Filters the locale requested for WordPress core translations.
	 *
	 * @since 2.8.0
	 *
	 * @param string $locale Current locale.
	 */
	$locale = apply_filters( 'core_version_check_locale', get_locale() );

	// Update last_checked for current to prevent multiple blocking requests if request hangs
	$current->last_checked = time();
	set_site_transient( 'update_core', $current );

	if ( method_exists( $wpdb, 'db_version' ) )
		$mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());
	else
		$mysql_version = 'N/A';

	if ( is_multisite() ) {
		$user_count = get_user_count();
		$num_blogs = get_blog_count();
		$wp_install = network_site_url();
		$multisite_enabled = 1;
	} else {
		$user_count = count_users();
		$user_count = $user_count['total_users'];
		$multisite_enabled = 0;
		$num_blogs = 1;
		$wp_install = home_url( '/' );
	}

	$query = array(
		'version'            => $wp_version,
		'php'                => $php_version,
		'locale'             => $locale,
		'mysql'              => $mysql_version,
		'local_package'      => isset( $wp_local_package ) ? $wp_local_package : '',
		'blogs'              => $num_blogs,
		'users'              => $user_count,
		'multisite_enabled'  => $multisite_enabled,
		'initial_db_version' => get_site_option( 'initial_db_version' ),
	);

	$post_body = array(
		'translations' => wp_json_encode( $translations ),
	);

	if ( is_array( $extra_stats ) )
		$post_body = array_merge( $post_body, $extra_stats );

	$url = $http_url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
		$url = set_url_scheme( $url, 'https' );

	$options = array(
		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
		'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
		'headers' => array(
			'wp_install' => $wp_install,
			'wp_blog' => home_url( '/' )
		),
		'body' => $post_body,
	);

	$response = wp_remote_post( $url, $options );
	if ( $ssl && is_wp_error( $response ) ) {
		trigger_error(
			sprintf(
				/* translators: %s: support forums URL */
				__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
				__( 'https://wordpress.org/support/' )
			) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
			headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
		);
		$response = wp_remote_post( $http_url, $options );
	}

	if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) ) {
		return;
	}

	$body = trim( wp_remote_retrieve_body( $response ) );
	$body = json_decode( $body, true );

	if ( ! is_array( $body ) || ! isset( $body['offers'] ) ) {
		return;
	}

	$offers = $body['offers'];

	foreach ( $offers as &$offer ) {
		foreach ( $offer as $offer_key => $value ) {
			if ( 'packages' == $offer_key )
				$offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ),
					array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' ) );
			elseif ( 'download' == $offer_key )
				$offer['download'] = esc_url( $value );
			else
				$offer[ $offer_key ] = esc_html( $value );
		}
		$offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale',
			'packages', 'current', 'version', 'php_version', 'mysql_version', 'new_bundled', 'partial_version', 'notify_email', 'support_email', 'new_files' ), '' ) );
	}

	$updates = new stdClass();
	$updates->updates = $offers;
	$updates->last_checked = time();
	$updates->version_checked = $wp_version;

	if ( isset( $body['translations'] ) )
		$updates->translations = $body['translations'];

	set_site_transient( 'update_core', $updates );

	if ( ! empty( $body['ttl'] ) ) {
		$ttl = (int) $body['ttl'];
		if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) {
			// Queue an event to re-run the update check in $ttl seconds.
			wp_schedule_single_event( time() + $ttl, 'wp_version_check' );
		}
	}

	// Trigger background updates if running non-interactively, and we weren't called from the update handler.
	if ( defined( 'DOING_CRON' ) && DOING_CRON && ! doing_action( 'wp_maybe_auto_update' ) ) {
		do_action( 'wp_maybe_auto_update' );
	}
}

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Version Description
2.3.0 Introduced.


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