3v4l.org

run code in 300+ PHP versions simultaneously

@ 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 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: baz
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 baz
Output for 7.0.0 - 7.0.25: Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/IMmfT on line 7
Process exited with code 255.

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