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<?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 git.master, git.master_jit, rfc.property-hooks
array ( 2015 => '2015', 2016 => '2016', 2017 => '2017', 2018 => '2018', 2019 => '2019', 2020 => '2020', 2021 => '2021', 2022 => '2022', 2023 => '2023', )

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