Why master.blade.php Isn't Processed in Laravel

I had the situation earlier where commands like:

@extends('layouts.master')
@section('title', 'Order Submitter LegendBorne Products')
@section('content')

in my template weren't being processed and this led me to do the normal bit of Google fu, alas, to no avail. And then I looked at the name of my template:

order_submitter_index.php

Yes – that's right. I was missing the .blade. suffix so a quick rename to:

order_submitter_index.blade.php

And all worked perfectly.