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<?php var_export(mb_convert_encoding([null, false, true, 0, 0.0, '', 'key' => 'value'], 'UTF-8'));
Output for 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => NULL, 1 => false, 2 => true, 3 => 0, 4 => 0.0, 5 => '', 'key' => 'value', )
preferences:
56.19 ms | 406 KiB | 5 Q