Add daily email for 2024-05-04

Strict typing in PHP

source/_daily_emails/2024-05-04.md

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+---
+title: Strict typing in PHP
+date: 2024-05-04
+permalink: archive/2024/05/04/strict-typing-in-php
+tags:
+    - software-development
+    - php
+cta: ~
+snippet: |
+    Do you enable strict types in your PHP code?
+---
+
+I prefer writing and working with strictly typed code.
+
+One of the major improvements in PHP has been the option to enable strict types.
+
+For example, this code will usually not error and give the result:
+
+```php
+function add(int $a, int $b): void
+{
+    var_dump($a + $b);
+}
+
+add(1, '1');
+```
+
+However, I'd prefer if it failed as I'm passing the function an integer and a string, but specifying they should both be integers.
+
+Fixing this is simple, by adding this line to the top of the file:
+
+```php
+declare(strict_types=1);
+```
+
+I add this to every PHP file by default.
+
+I want my code to be as strict and predictable as possible, and to error when I want it to and make any bugs more explicit and easier to find and fix.