3v4l.org

run code in 500+ PHP versions simultaneously

@ 2018-04-06T03:01:54Z

<?php

$v = Array(
    'ccrs_date',
    'Second Value',
    Array(
            'prelim_title_report_date',
            Array(
                    'additional_escrow_deposit_date',
                     Array(
                            'earnest_money_date',
                            Array(
                                    'acceptance_date',
                                    Array(
                                            'contract_date',
                                            123456,
                                            Array(
                                                    'prelim_title_report_date' 
                                                ),
                                            Array(
                                                'Hello WOrld'
                                            )    

                                        )

                                )

                        )

                )

        )
);

function get_zero_index(array $array, &$result = []) {
    foreach($array as $i => $v) {
        if (is_scalar($v)) {
            $result[] = $v;
        } elseif(is_array($v)) {
           get_zero_index($v, $result);
        }
    }
    return $result;
}

print_r(get_zero_index($v));

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: Array ( [0] => ccrs_date [1] => Second Value [2] => prelim_title_report_date [3] => additional_escrow_deposit_date [4] => earnest_money_date [5] => acceptance_date [6] => contract_date [7] => 123456 [8] => prelim_title_report_date [9] => Hello WOrld )

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