Custom error templates for symfony

1. Install twig-pack

$ composer require symfony/twig-pack

2. Templates dir

Put this file in your templates dir to catch any error in production

{# templates/bundles/TwigBundle/Exception/error.html.twig #}
{# https://symfony.com/doc/current/controller/error_pages.html#example-404-error-template #}

{% extends 'base.html.twig' %}

{% block body %}
    <h1>Error {{exception.statusCode}}</h1>

    <h3>Exception</h3>
    <pre>
    Message: {{ exception.message }}
    Code: {{ exception.code }}
    Type: {{ exception.class }}
    Previous exception: {{ exception.previous }}
    </pre>
    
    <h3>File</h3>
    <pre>
    File: {{ exception.file|split('/')|last }}
    Line: {{ exception.line }}
    </pre>
   
    <p>
        <a href="{{ path('app_home') }}">return to the homepage</a>.
    </p>

{% endblock %}

3. Test layout in dev environment

https://localhost/_error/{statusCode}

Symfony