3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gray_to_binary($value) { $dec = $value; for ($i = 1; $i < strlen($value); $i++) { $dec[$i] = (int)$dec[$i-1] ^ (int)$value[$i]; } return $dec; } echo bindec(gray_to_binary(decbin(115)));
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
93

preferences:
32.71 ms | 407 KiB | 5 Q