Online PHP editor | output for bpEub

@ 2022-04-29T03:35:22Z

<?php

$item = array (
    0 => 
    array (
        'invoice_id' => '72,',
        'item' => 'SN00001'
    ),
    1 => 
    array (
        'invoice_id' => '73,',
        'item' => 'SN00002'
    ),
    2 => 
    array (
        'invoice_id' => '73,',
        'item' => 'SN00003'
    ),
    3 => 
    array (
        'invoice_id' => '73,',
        'item' => 'SN00004'
    ),
    4 => 
    array (
        'invoice_id' => '74,',
        'item' => 'SN00005'
    ),
    5 => 
    array (
        'invoice_id' => '74,',
        'item' => 'SN00006'
    )
);

$items = array_map(function ($inv_id) use ($item) {
    return array('invoice_id' => $inv_id,
                 'group' => array_filter($item, 
                                         function ($itm) use ($inv_id) {
                                             return $itm['invoice_id'] == $inv_id;
                                         })
                 );
}, array_unique(array_column($item, 'invoice_id'))
);
print_r($items);

$items = array_values(array_map(function ($inv_id) use ($item) {
    return array('invoice_id' => $inv_id,
                 'group' => array_values(array_filter($item, 
                                                      function ($itm) use ($inv_id) { 
                                                          return $itm['invoice_id'] == $inv_id; 
                                                      }))
                 );
}, array_unique(array_column($item, 'invoice_id'))
));
print_r($items);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13: Array ( [0] => Array ( [invoice_id] => 72, [group] => Array ( [0] => Array ( [invoice_id] => 72, [item] => SN00001 ) ) ) [1] => Array ( [invoice_id] => 73, [group] => Array ( [1] => Array ( [invoice_id] => 73, [item] => SN00002 ) [2] => Array ( [invoice_id] => 73, [item] => SN00003 ) [3] => Array ( [invoice_id] => 73, [item] => SN00004 ) ) ) [4] => Array ( [invoice_id] => 74, [group] => Array ( [4] => Array ( [invoice_id] => 74, [item] => SN00005 ) [5] => Array ( [invoice_id] => 74, [item] => SN00006 ) ) ) ) Array ( [0] => Array ( [invoice_id] => 72, [group] => Array ( [0] => Array ( [invoice_id] => 72, [item] => SN00001 ) ) ) [1] => Array ( [invoice_id] => 73, [group] => Array ( [0] => Array ( [invoice_id] => 73, [item] => SN00002 ) [1] => Array ( [invoice_id] => 73, [item] => SN00003 ) [2] => Array ( [invoice_id] => 73, [item] => SN00004 ) ) ) [2] => Array ( [invoice_id] => 74, [group] => Array ( [0] => Array ( [invoice_id] => 74, [item] => SN00005 ) [1] => Array ( [invoice_id] => 74, [item] => SN00006 ) ) ) )

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