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@ 2018-09-13T00:06:27Z

<?php

class Node {
    public $next = null;                // define public to allow simple test case writing
    private $id;
    
    public function __construct($id) {
        $this->id = $id;
    }
    
    public function setNext(Node $next) {
        $this->next = $next;
    }
    
    public function action() {
        if ($this->next) {
            $this->next->action();
        }
        
        echo "action for {$this->id}" . PHP_EOL;
    }
}

// make a node list manually for testing
$id = 0;
$root = new Node(++ $id);
$root->next = new Node(++ $id);
$root->next = new Node(++ $id);
$root->next->next = new Node(++ $id);
$root->next->next->next = new Node(++ $id);
$root->next->next->next->next = new Node(++ $id);
$root->next->next->next->next->next = new Node(++ $id);

$root->action();

Output for git.master, git.master_jit, rfc.property-hooks: action for 7 action for 6 action for 5 action for 4 action for 3 action for 1

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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