title: Laravel 5 back() working on dev server, but not production
body: <p>We have a site developed in <code>Laravel 5.8</code>.</p>
  
  <p>When we move the code to the production server, our <code>back()</code> function references all result in a <code>302</code> redirect to the home page. </p>
  
  <p>On development, they redirect properly. We've been trying to find a point of differentiation between the servers and the PHP versions are the only significant differentiator. Development is running <code>7.3.11</code> and production is <code>7.2.26</code>. </p>
  
  <p>We're having the production server updated to match, but both of these versions are ahead of <code>v7.1.3</code> required by Laravel.</p>
  
  <p>Does it seem like the PHP version is the issue or are we missing something else? </p>