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@ 2023-04-05T22:07:04Z

<?php

$raw = array(
    'firstname' => 'Foo',
    'lastname'  => 'Bar',
    'nickname' => '',
    'birthdate' => [
        'day'   => '',
        'month' => '',
        'year'  => '',
    ],
    'likes' => [
        'cars'  => ['Subaru Impreza WRX STi', 'Mitsubishi Evo', 'Nissan GTR'],
        'bikes' => [],
    ],
    'zero' => 0,
    'deeper' => [
        'zeroString' => '0',
        'null' => null
    ],
    'false' => false,
    
);

function recursivelyRemoveEmpties(array $array): array
{
    foreach ($array as $key => &$value) {
        if (is_array($value)) {
            $value = recursivelyRemoveEmpties($value);
            if (!$value) {
                unset($array[$key]);
            }
            continue;
        }
        if ($value === '') {
            unset($array[$key]);
        }
    }

    return $array;
}

var_export(recursivelyRemoveEmpties($raw));

Output for git.master, git.master_jit, rfc.property-hooks: array ( 'firstname' => 'Foo', 'lastname' => 'Bar', 'likes' => array ( 'cars' => array ( 0 => 'Subaru Impreza WRX STi', 1 => 'Mitsubishi Evo', 2 => 'Nissan GTR', ), ), 'zero' => 0, 'deeper' => array ( 'zeroString' => '0', 'null' => NULL, ), 'false' => false, )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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