Source

File: wp-includes/class-wp-xmlrpc-server.php

public function initialise_blog_option_info() {
		$this->blog_options = array(
			// Read-only options.
			'software_name'           => array(
				'desc'     => __( 'Software Name' ),
				'readonly' => true,
				'value'    => 'WordPress',
			),
			'software_version'        => array(
				'desc'     => __( 'Software Version' ),
				'readonly' => true,
				'value'    => get_bloginfo( 'version' ),
			),
			'blog_url'                => array(
				'desc'     => __( 'WordPress Address (URL)' ),
				'readonly' => true,
				'option'   => 'siteurl',
			),
			'home_url'                => array(
				'desc'     => __( 'Site Address (URL)' ),
				'readonly' => true,
				'option'   => 'home',
			),
			'login_url'               => array(
				'desc'     => __( 'Login Address (URL)' ),
				'readonly' => true,
				'value'    => wp_login_url(),
			),
			'admin_url'               => array(
				'desc'     => __( 'The URL to the admin area' ),
				'readonly' => true,
				'value'    => get_admin_url(),
			),
			'image_default_link_type' => array(
				'desc'     => __( 'Image default link type' ),
				'readonly' => true,
				'option'   => 'image_default_link_type',
			),
			'image_default_size'      => array(
				'desc'     => __( 'Image default size' ),
				'readonly' => true,
				'option'   => 'image_default_size',
			),
			'image_default_align'     => array(
				'desc'     => __( 'Image default align' ),
				'readonly' => true,
				'option'   => 'image_default_align',
			),
			'template'                => array(
				'desc'     => __( 'Template' ),
				'readonly' => true,
				'option'   => 'template',
			),
			'stylesheet'              => array(
				'desc'     => __( 'Stylesheet' ),
				'readonly' => true,
				'option'   => 'stylesheet',
			),
			'post_thumbnail'          => array(
				'desc'     => __( 'Post Thumbnail' ),
				'readonly' => true,
				'value'    => current_theme_supports( 'post-thumbnails' ),
			),

			// Updatable options.
			'time_zone'               => array(
				'desc'     => __( 'Time Zone' ),
				'readonly' => false,
				'option'   => 'gmt_offset',
			),
			'blog_title'              => array(
				'desc'     => __( 'Site Title' ),
				'readonly' => false,
				'option'   => 'blogname',
			),
			'blog_tagline'            => array(
				'desc'     => __( 'Site Tagline' ),
				'readonly' => false,
				'option'   => 'blogdescription',
			),
			'date_format'             => array(
				'desc'     => __( 'Date Format' ),
				'readonly' => false,
				'option'   => 'date_format',
			),
			'time_format'             => array(
				'desc'     => __( 'Time Format' ),
				'readonly' => false,
				'option'   => 'time_format',
			),
			'users_can_register'      => array(
				'desc'     => __( 'Allow new users to sign up' ),
				'readonly' => false,
				'option'   => 'users_can_register',
			),
			'thumbnail_size_w'        => array(
				'desc'     => __( 'Thumbnail Width' ),
				'readonly' => false,
				'option'   => 'thumbnail_size_w',
			),
			'thumbnail_size_h'        => array(
				'desc'     => __( 'Thumbnail Height' ),
				'readonly' => false,
				'option'   => 'thumbnail_size_h',
			),
			'thumbnail_crop'          => array(
				'desc'     => __( 'Crop thumbnail to exact dimensions' ),
				'readonly' => false,
				'option'   => 'thumbnail_crop',
			),
			'medium_size_w'           => array(
				'desc'     => __( 'Medium size image width' ),
				'readonly' => false,
				'option'   => 'medium_size_w',
			),
			'medium_size_h'           => array(
				'desc'     => __( 'Medium size image height' ),
				'readonly' => false,
				'option'   => 'medium_size_h',
			),
			'medium_large_size_w'     => array(
				'desc'     => __( 'Medium-Large size image width' ),
				'readonly' => false,
				'option'   => 'medium_large_size_w',
			),
			'medium_large_size_h'     => array(
				'desc'     => __( 'Medium-Large size image height' ),
				'readonly' => false,
				'option'   => 'medium_large_size_h',
			),
			'large_size_w'            => array(
				'desc'     => __( 'Large size image width' ),
				'readonly' => false,
				'option'   => 'large_size_w',
			),
			'large_size_h'            => array(
				'desc'     => __( 'Large size image height' ),
				'readonly' => false,
				'option'   => 'large_size_h',
			),
			'default_comment_status'  => array(
				'desc'     => __( 'Allow people to submit comments on new posts.' ),
				'readonly' => false,
				'option'   => 'default_comment_status',
			),
			'default_ping_status'     => array(
				'desc'     => __( 'Allow link notifications from other blogs (pingbacks and trackbacks) on new posts.' ),
				'readonly' => false,
				'option'   => 'default_ping_status',
			),
		);

		/**
		 * Filters the XML-RPC blog options property.
		 *
		 * @since 2.6.0
		 *
		 * @param array $blog_options An array of XML-RPC blog options.
		 */
		$this->blog_options = apply_filters( 'xmlrpc_blog_options', $this->blog_options );
	}