Online PHP editor | output for J7Ggv

@ 2020-06-10T11:26:08Z

<?php

$rows = [
    100 => [
        ['product_id' => 101, 'name' => ''],
        ['product_id' => 102, 'name' => ''],
        ['product_id' => 103, 'name' => ''],
    ],
    200 => [
        ['product_id' => 201, 'name' => ''],
        ['product_id' => 202, 'name' => ''],
    ],
    300 => [
        ['product_id' => 301, 'name' => ''],
        ['product_id' => 302, 'name' => ''],
        ['product_id' => 303, 'name' => ''],
        ['product_id' => 304, 'name' => ''],
    ]
];

var_export(
    array_merge(                           #flatten the unpacked elements
        ...array_map(                      #unpack
            fn(...$v) => array_filter($v), #transpose discarding nulls
            ...$rows                       #transpose discarding nulls
        )                                  #unpack
    )                                      #flatten the unpacked elements
);

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: array ( 0 => array ( 'product_id' => 101, 'name' => '', ), 1 => array ( 'product_id' => 201, 'name' => '', ), 2 => array ( 'product_id' => 301, 'name' => '', ), 3 => array ( 'product_id' => 102, 'name' => '', ), 4 => array ( 'product_id' => 202, 'name' => '', ), 5 => array ( 'product_id' => 302, 'name' => '', ), 6 => array ( 'product_id' => 103, 'name' => '', ), 7 => array ( 'product_id' => 303, 'name' => '', ), 8 => array ( 'product_id' => 304, 'name' => '', ), )
Output for 7.3.0 - 7.3.33: Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/J7Ggv on line 24
Process exited with code 255.
Output for 7.2.0 - 7.2.33: Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ',' or ')' in /in/J7Ggv on line 24
Process exited with code 255.

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