Maintenance and index redirect

[cffood]

<?php require_once("includes/db_connection.php"); ?>

<?php
$system = '{$offline}';

$query  = "SELECT system FROM ";
    $query .= "offline" ;
          return $query;

if ($system == 1) {
      header("Location: public/maintenance.php");
  } else {
        header("Location: public/index.php");
  }
?>

ok struggling a little with redirecting. If offline in the database is set to true or 1 i want it to be redirect to the public/maintenace.php or if false to be sent to public/index.php

with this code i made it just shows a blank white screen with no errors!

 

I am learning php still so if the code is wrong I do apploagise but any help would not be gone un-noticed.

[cffood]

Done it :

 

with a code of

<?php
if ($core->offline == 0)
      header("Location: public/maintenace.php");
  else
      header("Locatioon: public/index.php"); ?>

and some functions..