3v4l.org

run code in 300+ PHP versions simultaneously

@ 2015-10-15T18:05:16Z

<?php

class Node 
{
    public $child;
}

function hasCycle($node) {
    $hare = $node;
    
    while ($node->child) {
        $node = $node->child;
        $hard = $hard->child->child;
        
        if ($node == $hare) {
            return true;
        }
    }
    
    return false;
}


function getLinkedList($length, $cycle = false)
{
    $root = $node = new Node;
    $cycle_node = null;
    
    while ($length--) {
        $new_node = new Node;
        $node->child = $new_node;
        $node = $new_node;
        
        if ($cycle && $length == floor($length / 2)) {
            $cycle_node = $node;
        }
    }
    
    if ($cycle) {
        $node->child = $cycle_node;
    }
    
    return $root;
}


$cycled_list = getLinkedList(100, true);
$list = getLinkedList(100, false);


var_dump(has_cycle($cycled_list), has_cycle($list));

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Call to undefined function has_cycle() in /in/eECgf:51 Stack trace: #0 {main} thrown in /in/eECgf on line 51
Process exited with code 255.

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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

preferences:dark modelive preview

53.26 ms | 401 KiB | 8 Q