change to switch, add option for windows systems

Author: kingkero

admin-command.php

@@ -8,9 +8,15 @@
  * Open /wp-admin/ in a browser.
  */
 $wp_admin = function() {
-	$exec = 'xdg-open';
-	if ( 'DAR' === strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
-		$exec = 'open';
+	switch ( strtoupper( substr( PHP_OS, 0, 3 ) ) ) {
+		case 'DAR':
+			$exec = 'open';
+			break;
+		case 'WIN':
+			$exec = 'start ""';
+			break;
+		default:
+			$exec = 'xdg-open';
 	}
 	passthru( $exec . ' ' . escapeshellarg( admin_url() ) );
 };