In Python, do you use an array or a linked list?

In PHP, the data type most commonly used for these purposes is array.

Arrays in PHP can be either ordered (indexed with numeric keys) or associative (using string keys).

Examples:

<?php
// Indexed array (similar to list or array in other languages)
$indexedArray = [1, 2, 3, 'four'];

// Associative array (similar to dictionary or hash table)
$associativeArray = [
    'name' => 'Ivan',
    'age' => 30,
    'city' => 'Moscow'
];
?>

PHP does not have a built-in data type called "linked list" as such. To mimic its behavior, arrays can be used, but this will not be a true implementation of a linked list with its inherent performance characteristics for insertion/deletion in the middle.

For working with collections of objects that can behave like linked lists or queues, SPL (Standard PHP Library) can be used, for example SplDoublyLinkedList:

<?php
// Using SplDoublyLinkedList to mimic a linked list
$linkedList = new SplDoublyLinkedList();
$linkedList->push('element 1'); // Adds to the end
$linkedList->unshift('element 0'); // Adds to the beginning

// Moving the pointer for traversal
$linkedList->rewind();
while ($linkedList->valid()) {
    echo $linkedList->current() . "\n";
    $linkedList->next();
}
?>

However, in the vast majority of everyday PHP tasks, the array type is used for storing collections of data.