See the proposal for the "array_is_list" function, and related messages on the internal mailing list.
https://wiki.php.net/rfc/is_list

@requinix

Well, what I mean is an actual List data type or a List object data type. Reading the link you gave me, it pertains to just arrays. So basically pluralizing objects. What I am talking about is something like this as an example (not working for obvious reasons).

------

<?php
class Author {

	public function __construct(public string $first_name = '', public string $middle_name = '', public string $last_name = '') {

	}

}

List<Author> $authors = new List<Author>();
$authors->add(new Author('Courtney', '', 'Peppernell'));
$authors->add(new Author('William', '', 'Shakespeare'));
$authors->add(new Author('Claudia', '', 'Rankine'));
$authors->add(new Author('Jacqueline', '', 'Woodson'));
$authors->add(new Author('Edgar', 'Allan', 'Poe'));

// Would give you a list of authors as such
// List <Courtney Peppernell>, <William Shakespeare>, <Claudia Rankine>, <Jacqueline Woodson>, <Edgar Allan Poe>
print_r($authors);

------

Since PHP has already adopted "some" of Java's OOP, why can't we just adopt everything? Most languages have List data types so why can't PHP? I know people will say arrays are enough, but having a consistency in OOP would help people move around languages to languages more. Plus, it sort of seems PHP is heading that way anyways where everything is more strictly typed.

Sounds like you want SplDoublyLinkedList.
https://www.php.net/manual/en/class.spldoublylinkedlist.php

Queue or Stack could be more appropriate for your use case.
https://www.php.net/manual/en/class.splqueue.php
https://www.php.net/manual/en/class.splstack.php