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phpphp-7type-hintingtype-declaration

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

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;
Solution

  • 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.