update_site_option( string $option, mixed $value )

更新已为当前网络添加的选项的值。
Updates the value of an option that was already added for the current network.

说明（Description）

另请参见更新网络选项（）

参数（Parameters）

源码（Source）

/**
 * Update the value of a site option that was already added.
 *
 * @since 2.8.0
 *
 * @see update_option()
 *
 * @global wpdb $wpdb
 *
 * @param string $option Name of option. Expected to not be SQL-escaped.
 * @param mixed  $value  Option value. Expected to not be SQL-escaped.
 * @return bool False if value was not updated and true if value was updated.
 */
function update_site_option( $option, $value ) {
	global $wpdb;

	wp_protect_special_option( $option );

	$old_value = get_site_option( $option );

	/**
	 * Filter a specific site option before its value is updated.
	 *
	 * The dynamic portion of the hook name, `$option`, refers to the option name.
	 *
	 * @since 2.9.0 As 'pre_update_site_option_' . $key
	 * @since 3.0.0
	 *
	 * @param mixed $value     New value of site option.
	 * @param mixed $old_value Old value of site option.
	 */
	$value = apply_filters( 'pre_update_site_option_' . $option, $value, $old_value );

	if ( $value === $old_value )
		return false;

	if ( false === $old_value )
		return add_site_option( $option, $value );

	$notoptions_key = "{$wpdb->siteid}:notoptions";
	$notoptions = wp_cache_get( $notoptions_key, 'site-options' );
	if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) {
		unset( $notoptions[$option] );
		wp_cache_set( $notoptions_key, $notoptions, 'site-options' );
	}

	if ( !is_multisite() ) {
		$result = update_option( $option, $value );
	} else {
		$value = sanitize_option( $option, $value );

		$serialized_value = maybe_serialize( $value );
		$result = $wpdb->update( $wpdb->sitemeta, array( 'meta_value' => $serialized_value ), array( 'site_id' => $wpdb->siteid, 'meta_key' => $option ) );

		if ( $result ) {
			$cache_key = "{$wpdb->siteid}:$option";
			wp_cache_set( $cache_key, $value, 'site-options' );
		}
	}

	if ( $result ) {

		/**
		 * Fires after the value of a specific site option has been successfully updated.
		 *
		 * The dynamic portion of the hook name, `$option`, refers to the option name.
		 *
		 * @since 2.9.0 As "update_site_option_{$key}"
		 * @since 3.0.0
		 *
		 * @param string $option    Name of site option.
		 * @param mixed  $value     Current value of site option.
		 * @param mixed  $old_value Old value of site option.
		 */
		do_action( "update_site_option_{$option}", $option, $value, $old_value );

		/**
		 * Fires after the value of a site option has been successfully updated.
		 *
		 * @since 3.0.0
		 *
		 * @param string $option    Name of site option.
		 * @param mixed  $value     Current value of site option.
		 * @param mixed  $old_value Old value of site option.
		 */
		do_action( "update_site_option", $option, $value, $old_value );

		return true;
	}
	return false;
}

笔记（Notes）