Fixed some errors

installer.sh

@@ -22,9 +22,15 @@ install)
     fi
 ;;
 delete)
-    php_sys=$(cat /etc/hestia_php_selector/system/php.path)
-    if [ -n "$php_sys" ]; then
-        update-alternatives --set php "$php_sys"
+    if [ -e /etc/hestia_php_selector/system/php.path ]; then
+        php_sys=$(cat /etc/hestia_php_selector/system/php.path)
+        if [ -n "$php_sys" ]; then
+            update-alternatives --set php "$php_sys"
+        fi
+    fi
+    update-alternatives --display php | grep hestiacp-php-selector
+    if [ $? -ne 0 ]; then
+        update-alternatives --remove php /usr/bin/hestiacp-php-selector
     fi
     /usr/bin/hestiacp-php-admin remove-all
 ;;

src/converter/hestiacp-php-set-ver.go

@@ -172,7 +172,7 @@ func setUserPhpPathVer(username string, php_ver string, php_path string) error {
 		}
 	}
 	path_to_php_config := path.Join(root_path, PATH_TO_CONFIG_NAME)
-	f, err := os.OpenFile(path_to_php_config, os.O_WRONLY, 0400)
+	f, err := os.OpenFile(path_to_php_config, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0400)
 	if err != nil {
 		return err
 	}