3v4l.org

run code in 300+ PHP versions simultaneously

@ 2019-04-14T19:57:27Z

<?php
$arr = array
(
    "100" => array(
        array(
            "country" => 'France',
            "city" => 'Paris',
            "population" => '1800000',
        ),
        array(
            "country" => 'France',
            "city" => 'Paris',
            "population" => '2000000',
        ),
        array(
            "country" => 'France',
            "city" => 'Toulouse',
            "population" => '500000',
        ),
    ),
    "101" => array(
        array(
            "country" => 'Russia',
            "city" => 'Moscow',
            "population" => '144000000',
        )
    )
);

foreach($arr as $k => &$ar) {
    $mins = array_reduce($ar, function ($carry, $item) {
        $key = $item["country"] . "###" . $item["city"];
        $carry[$key] = (isset($carry[$key]) && $item["population"] > $carry[$key]) ?  $carry[$key] : $item["population"];
        return $carry;
    }, []);
    $ar = array_filter($ar, function ($item) use ($mins) {
        $key = $item["country"] . "###" . $item["city"];
        return $mins[$key] == $item["population"];
    });
}
print_r($arr);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [100] => Array ( [0] => Array ( [country] => France [city] => Paris [population] => 1800000 ) [2] => Array ( [country] => France [city] => Toulouse [population] => 500000 ) ) [101] => Array ( [0] => Array ( [country] => Russia [city] => Moscow [population] => 144000000 ) ) )

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

2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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 previewkey bindings

159.87 ms | 407 KiB | 5 Q