3v4l.org

run code in 300+ PHP versions simultaneously
<?php $binarydata = "\x04\x00\xa0\x00"; var_dump(unpack("H*result", $binarydata));
Output for 4.3.0 - 4.3.9, 4.3.11, 4.4.0 - 4.4.1, 4.4.3 - 4.4.9, 5.0.0 - 5.0.2, 5.0.5, 5.1.0 - 5.1.1, 5.1.3 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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(1) { ["result"]=> string(8) "0400a000" }
Output for 4.4.2, 5.1.2
array(1) { ["result"]=> string(9) "0400a0000" }
Output for 4.3.10, 5.0.3 - 5.0.4
Warning: unpack(): Type H: outside of string in /in/HEhk4 on line 3 array(1) { ["result"]=> string(8) "0400a000" }

preferences:
236.56 ms | 402 KiB | 325 Q