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@ 2017-07-11T14:04:44Z

<?php
class Node {
    public $val;
    public $next;
    
    public function __construct($val, $next) {
        $this->val = $val;
        $this->next = $next;
    }
    
    public function __toString() {
        $a = [];
        $c = $this;
        while ($c != null) {
            $a[] = $c->val;
            $c = $c->next;
        }
        return implode(", ", $a)."\n";
    }
    
    public static function reverse($list) {
        $newl = null;
        $curr = $list;
        while ($curr != null) {
            $next = $curr->next;
            $curr->next = $newl;
            $newl = $curr;
            $curr = $next;
        }
        return $newl;
    }
    
    public static function reverseRecursively($list) {
        if ($list == null || $list->next == null) {
            return $list;
        }
        
        $next = $list->next;
        $list->next = null;
        $next = self::reverseRecursively($next);
        $next->next = $list;
        
        return $newl;
    }
}

$list = new Node(1, new Node(2, new Node(3, new Node(4, new Node(5, null)))));
echo $list;

$list = Node::reverse($list);
echo $list;

$list = Node::reverseRecursively($list);
echo $list;
exit();

Output for git.master, git.master_jit, rfc.property-hooks: 1, 2, 3, 4, 5 5, 4, 3, 2, 1 Warning: Undefined variable $newl in /in/43uni on line 43 Fatal error: Uncaught Error: Attempt to assign property "next" on null in /in/43uni:41 Stack trace: #0 /in/43uni(40): Node::reverseRecursively(Object(Node)) #1 /in/43uni(40): Node::reverseRecursively(Object(Node)) #2 /in/43uni(53): Node::reverseRecursively(Object(Node)) #3 {main} thrown in /in/43uni on line 41
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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