config.php update

Sources/php_script/script/config.php

@@ -6,7 +6,7 @@ $db_name=$_ENV("INNONDB_DATABASE");
 try {                                                                            //Try to connect to the database
     $connect = mysqli_connect($host, $username, $password, $db_name);            //Connecting to database
 }catch (mysqli_sql_exception){                                                   //If the connection failed
-    print(json_encode($host,$username,$password));
+    print(json_encode(strval($host)));
     // print(json_encode("Failed to connect to MySQL, connection timeout"));        //Return a json string, so the dart script can interpret the error
     exit(-1);                                                                    //Send a return code as -1, so insert.php can know if the connection is successful
 }