Online PHP editor | output for 9rEm4

@ 2023-01-13T01:30:10Z

<?php

$years = array(
    array(2015 => '2015'),
    array(2016 => '2016'),
    array(2017 => '2017'),
    array(2018 => '2018'),
    array(2019 => '2019'),
    array(2020 => '2020'),
    array(2021 => '2021'),
    array(2022 => '2022'),
    array(2023 => '2023')
);

// var_export(array_merge(...$years)); // loses numeric associative keys
// var_export(call_user_func_array('array_merge', $years)); // loses numeric associative keys
// var_export(array_reduce($years, 'array_merge', array())); // loses numeric associative keys
var_export(iterator_to_array(new RecursiveIteratorIterator(new RecursiveArrayIterator($years))));

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1: array ( 2015 => '2015', 2016 => '2016', 2017 => '2017', 2018 => '2018', 2019 => '2019', 2020 => '2020', 2021 => '2021', 2022 => '2022', 2023 => '2023', )
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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