3v4l.org

run code in 300+ PHP versions simultaneously
<?php $number = 1234567890; $hex = strtoupper(dechex($number)); $hex_padded = str_pad($hex, 9*2, "0", STR_PAD_LEFT); preg_match_all('/.{2}/', $hex_padded, $matches); $result = array_reverse($matches[0]); var_dump($result);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(9) { [0]=> string(2) "D2" [1]=> string(2) "02" [2]=> string(2) "96" [3]=> string(2) "49" [4]=> string(2) "00" [5]=> string(2) "00" [6]=> string(2) "00" [7]=> string(2) "00" [8]=> string(2) "00" }

preferences:
324.93 ms | 406 KiB | 425 Q