I have the code below:

   <?php
   $title = "Result Computation" ;
   ?>

     <title>
     <?php echo $title ; ?>
     </title>

I'm using includes to call the header on all the pages, but what i want to do is that on every page i want to make it generate a specific title. On each page i've added

 $title = "Page Title" ;

So that when the page loads it gets the title from the $title i've set on that page, but it the pages keep getting the default Title. Please how do i solve this? Thanks for your time.