wp_register_plugin_realpath( string $file ): bool

813function wp_register_plugin_realpath( $file ) {814	global $wp_plugin_paths;815 816	// Normalize, but store as static to avoid recalculation of a constant value.817	static $wp_plugin_path = null, $wpmu_plugin_path = null;818 819	if ( ! isset( $wp_plugin_path ) ) {820		$wp_plugin_path   = wp_normalize_path( WP_PLUGIN_DIR );821		$wpmu_plugin_path = wp_normalize_path( WPMU_PLUGIN_DIR );822	}823 824	$plugin_path     = wp_normalize_path( dirname( $file ) );825	$plugin_realpath = wp_normalize_path( dirname( realpath( $file ) ) );826 827	if ( $plugin_path === $wp_plugin_path || $plugin_path === $wpmu_plugin_path ) {828		return false;829	}830 831	if ( $plugin_path !== $plugin_realpath ) {832		$wp_plugin_paths[ $plugin_path ] = $plugin_realpath;833	}834 835	return true;836}