String type casing in php, is it string or String?

Question

What is the official name for the php string type?

Is it 'string' like c#, or 'String' like Java, or either?

I could not find it in http://php.net/manual/en/language.types.string.php

I want to use it to strict type my function

function getImageName() : string;

or

function getImageName() : String;

Mascagni

mlocati.github.io/articles/php-type-hinting.html – Amendatory

The case does not matter. STRING works as well as string or sTrInG. But I'd always use the lower variant (string). This is the preferred way to dot it. – Bagging

Interesting. I never knew PHP was case insensitive in some cases. https://mcmap.net/q/324905/-php-amp-case-sensitivity-duplicate – Mascagni

Answer 1

As PHP is a partially case sensitive language and, in particular, keywords are NOT case sensitive, the case doesn't matter for built-in type names. Both string and String will work as type declaration (aka 'type hint').

The official documentation mentions the lowercase variants, so it's probably a good idea to use lowercase keywords as code style — just like most PHP code styles use foreach and not Foreach, for example.

P.S. You can find the documentation on the PHP Function arguments page, 'Type declarations' section.

Heartland