diff --git a/server/scripts/ispconfig_patch b/server/scripts/ispconfig_patch
index a3361f507d79435aed7fdba34e781b9ace7b0aff..4470552c137e7c5fc5c0ee62178c8492a2a463a4 100644
--- a/server/scripts/ispconfig_patch
+++ b/server/scripts/ispconfig_patch
@@ -79,7 +79,9 @@ function simple_query($query, $answers, $default)
 }
 
 function is_installed($appname) {
-	exec('which '.escapeshellcmd($appname).' 2> /dev/null',$out,$returncode);
+	$out = array();
+	$returncode = null;
+	exec('which '.escapeshellarg($appname).' 2> /dev/null',$out,$returncode);
 	if(isset($out[0]) && stristr($out[0],$appname) && $returncode == 0) {
 		return true;
 	} else {
@@ -105,14 +107,18 @@ echo " _____ ___________   _____              __ _
                                              |___/ ";
 echo "\n".str_repeat('-',80)."\n";
 echo "\n\n>> Patch tool  \n\n";
-if(!$auto) echo "Please enter the patch id that you want to be applied to your ISPConfig installation.\nPlease be aware that we take NO responsibility that this will work for you.\nOnly use patches if you know what you are doing.\n\n";
+if(!$auto) {
+	echo "Please enter the patch id that you want to be applied to your ISPConfig installation.\nPlease be aware that we take NO responsibility that this will work for you.\nOnly use patches if you know what you are doing.\n\n";
+}
 
 if(!is_installed('patch')) {
 	swriteln("The program 'patch' is missing on your server. Please install it and try again.");
 	exit;
 }
 
-if(!$auto) $patch_id = simple_query('Enter patch id', false, '');
+if(!$auto) {
+	$patch_id = simple_query('Enter patch id', false, '');
+}
 if($patch_id == '') {
     swriteln("Patch terminated by user.\n");
     die();
@@ -129,8 +135,12 @@ if(!$patch_data) {
 
 $patch_text = @file_get_contents('http://ispconfig.org/downloads/patches/' . $patch_id . '.txt');
 if($patch_text) {
-    if($auto) $ok = 'y'; else $ok = simple_query("Patch description:\n".str_repeat("-", 80)."\n".$patch_text."\n".str_repeat("-", 80)."\nDo you really want to apply this patch now?", array('y','n'), 'y');
-    if($ok != 'y') {
+    if($auto) {
+		$ok = 'y';
+	} else {
+		$ok = simple_query("Patch description:\n" . str_repeat("-", 80) . "\n" . $patch_text . "\n" . str_repeat("-", 80) . "\nDo you really want to apply this patch now?", array('y', 'n'), 'y');
+	}
+	if($ok != 'y') {
         swriteln("Patch terminated by user.\n");
         die();
     }
@@ -146,5 +156,3 @@ passthru('patch -p0 < ' . escapeshellarg($temp_file));
 unlink($temp_file);
 
 exit;
-
-?>