3v4l.org

run code in 500+ PHP versions simultaneously
<?php $number = 0x12A; $string = '0x12A'; // direct decoding echo hexdec($string); // the reverse way $newString = '0x'.dechex($number); ?>
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
298

preferences:
66.58 ms | 864 KiB | 4 Q