Online PHP editor | output for fgorg

@ 2021-09-15T13:02:54Z

<?php
$data = array(
    '2021-08-31' => array( 'country_id' => array( '191' => array( '20098' ) ) ),
    '2021-08-18' => array( 'country_id' => array( '214' => array( '14876' ) ) ),
    '2021-07-12' => array( 'country_id' => array( '103' => array( '19709' ) ) ),
    '2021-07-07' => array( 'country_id' => array( '206' => array( '9568' ) ) ),
    '2021-06-28' => array( 'country_id' => array( '246' => array( '19561' ), '132' => array( '19277' ), '1' => array( '2816' ), '83' => array( '19530' ), '21' => array('3340'), '202' => array( '14136' ), '103' => array( '17006' ) ) ),
    '2021-06-25' => array( 'country_id' => array( '99' => array( '14561' ), '102' => array( '26789' ), '21' => array( '7690' ), '210' => array( '242325' ), '11' => array('436432'), '999' => array( '43734' ), '768' => array( '34437' ) ) ),);

// set your slice with start and end
$start = 3;
$end = 9;

$count = 0;
$store = []; // the result store
foreach($data as $date => $record) {
    foreach($record['country_id'] as $k => $countryIds) {
        foreach($countryIds as $id) {
            $count++;
            if($count >= $start && $count <= $end) $store[$date]['country_id'][$k] = $countryIds;
        }
    }
}

print_r($store);

Output for 7.3.0 - 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: Array ( [2021-07-12] => Array ( [country_id] => Array ( [103] => Array ( [0] => 19709 ) ) ) [2021-07-07] => Array ( [country_id] => Array ( [206] => Array ( [0] => 9568 ) ) ) [2021-06-28] => Array ( [country_id] => Array ( [246] => Array ( [0] => 19561 ) [132] => Array ( [0] => 19277 ) [1] => Array ( [0] => 2816 ) [83] => Array ( [0] => 19530 ) [21] => Array ( [0] => 3340 ) ) ) )
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 Array ( [2021-07-12] => Array ( [country_id] => Array ( [103] => Array ( [0] => 19709 ) ) ) [2021-07-07] => Array ( [country_id] => Array ( [206] => Array ( [0] => 9568 ) ) ) [2021-06-28] => Array ( [country_id] => Array ( [246] => Array ( [0] => 19561 ) [132] => Array ( [0] => 19277 ) [1] => Array ( [0] => 2816 ) [83] => Array ( [0] => 19530 ) [21] => Array ( [0] => 3340 ) ) ) )

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