What is the difference between Array and array?

Question

In this OOP tutorial, I noticed the following code:

public function validate(Array $data, Array $rules){}

My question is if that is the same as:

public function validate(array $data, array $rules){}

In the PHP.net documentation, I could find a reference only to the second form.

It seems that they both mean the same thing. In other news; during a little research for this question I have found out that PHP is in general completely case-insensitive. Ergo: you can use whatever case you'd like. — klaar, Oct 21 '15 at 08:58
What do you mean by "completely case-insensitive"? Are you talking about all php code or only reserved words? — Michael Haddad, Oct 21 '15 at 09:02
I'm talking about quite a big part of PHP, as said in [this comment](http://stackoverflow.com/a/18516698/5147246) in [this SA question: 'Are PHP functions case sensitive?'](http://stackoverflow.com/questions/5643496/are-php-functions-case-sensitive). [This blogpost](http://the-echoplex.net/log/php-case-sensitivity) has done some research on this matter. — klaar, Oct 21 '15 at 09:10

score 5 · Accepted Answer · answered Oct 21 '15 at 09:01

5

They are both the same. Some IDEs only recognize one of the forms, though. (Just like stackoverflow itself, which only stylizes Array

answered Oct 21 '15 at 09:01

Luis Ávila

4

Yes, even you can declare your array like this: `$arr = aRrAy(1, 2, 3);` – Kristian Vitozev Oct 21 '15 at 09:02

David Syengo · Answer 2 · 2023-03-07T12:51:48.653

0

Short answer: PHP constructs, class names, functions and user-defined functions are case-insensitive.

edited Mar 07 '23 at 12:51

answered May 12 '22 at 14:38

David Syengo

1

Functions yes, variable names not: `$aaa = 'a'; echo $AAA;` -> undefixed $AAA – Martijn Feb 26 '23 at 11:49
Thanks @Martijn for pointing that out, I've corrected. – David Syengo Mar 07 '23 at 12:52

score -5 · Answer 3 · answered Oct 21 '15 at 08:58

-5

Javascript can only usw "Array". Using "array" in PHP is no problem, but if you want do use Javascript too, it will cause an error.

answered Oct 21 '15 at 08:58

HightronicDesign

3 Answers3