Hello fellow programmers and coding enthusiasts! Today, we delve into the intriguing world of PHP with a master-level programming challenge that will test your skills and deepen your understanding of this powerful scripting language. At ProgrammingHomeworkHelp.com, we're passionate about assisting students in mastering their programming assignments, and we're excited to share this challenging question along with a comprehensive solution crafted by our expert.

Question: Reverse a Linked List in PHP

Write a PHP function to reverse a singly linked list. The function should take the head of the linked list as input and return the new head of the reversed linked list.

class Node {
    public $data;
    public $next;

    public function __construct($data) {
        $this->data = $data;
        $this->next = null;
    }
}

function reverseLinkedList($head) {
    // Your code goes here
}

// Example usage:
$head = new Node(1);
$head->next = new Node(2);
$head->next->next = new Node(3);
$head->next->next->next = new Node(4);

$newHead = reverseLinkedList($head);

// After reversing, $newHead should point to the Node with data 4.

This question tests your understanding of linked lists and your ability to manipulate pointers in PHP. Ensure that your solution works for different cases and handles edge cases properly.


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