How is version checking implemented in WordPress?

dmitrii_fediuk · February 28, 2024, 5:54am

WordPress/WordPress/blob/5.8.3/wp-includes/update.php#L146-L166


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

An api.wordpress.org/core/version-check/1.7/ response example