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@ 2017-10-31T08:55:46Z

<?php

class Node
{
    private $key, $kids;

    public function __construct(string $key, ?Node $parent = null)
    {
        if ($parent !== null)
            $parent->kids[$key] = $this;
            
        $this->key = $key;
    }
    
    public function match(array $parts): ?self
    {
        if (empty($parts))
            return $this;

        $part = array_shift($parts);

        if (isset($this->kids[$part]))
            return $this->kids[$part]->match($parts);
        else
            return null;
    }
    
    public function getKey(): string
    {
        return $this->key;
    }
}

/*
 * root
 *  |-- foo
 *  `-- bar
 *      `-- baz
 */
$root = new Node("");
$foo = new Node("foo", $root);
$bar = new Node("bar", $root);
$baz = new Node("baz", $bar);

$node = $root->match(explode("/", "bar/baz"));

if ($node !== null)
    echo $node->getKey();

Output for git.master, git.master_jit, rfc.property-hooks: baz

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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