3v4l.org

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<?php $padding = 6; $letters = range('A', 'Z'); $i = 25; var_export(array_slice( $letters, $i - min($i, $padding), $padding + 1 + min($i, $padding) ));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 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 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => 'T', 1 => 'U', 2 => 'V', 3 => 'W', 4 => 'X', 5 => 'Y', 6 => 'Z', )

preferences:
56.78 ms | 408 KiB | 5 Q