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To: dmitry@zend.com
Cc: ajf@ajf.me, nikita.ppv@gmail.com, internals@lists.php.net
Message-ID: <20150202210349.6FB91261948@dd15934.kasserver.com>
Date: Mon,  2 Feb 2015 22:03:49 +0100 (CET)
Subject: Re: [PHP-DEV] What do we need strict scalar type hints for?
From: mails@thomasbley.de ("Thomas Bley")

Here is a typical billing example which uses exceptions:

<?php
ini_set('error_reporting', E_ALL);
ini_set('display_errors', 1);

addVat('apples');

function addVat($amount) {
  if (!is_int($amount) && !is_float($amount)) {
    throw new InvalidArgumentException('Argument 1 passed to '.__FUNCTION__.' must be of the type int|float, '.gettype($amount).' given');
  }
  return round($amount*1.19, 2);
}

Instead of multiple strict scalar hints (e.g. function addVat(int|float $amount){...}), I would prefer to have "numeric" as strict type:
function addVat(numeric $amount){...}

Regards
Thomas


Dmitry Stogov wrote on 02.02.2015 10:12:

> hi,
> 
> could you please write down few use cases, when strict scalar type hints
> are really useful.
> 
> Thanks. Dmitry.
>