Fix backup

scripts/backup

@@ -30,6 +30,7 @@ app=$YNH_APP_INSTANCE_NAME
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP