3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function maxBit() { list($return, $number) = array(0, 0); // Start process while (true) { // Get number at x bits $numX = intval(bcsub(bcpow('2', "{$return}"), '1')); // Check number if ($numX != 0 && $number == $numX) { break; } // Update number $number = $numX; // Update return value $return++; } return $return; } echo maxBit();
Output for 5.3.21 - 5.5.28, 5.5.31 - 5.5.33, 5.5.35 - 5.6.12, 5.6.16 - 5.6.19, 5.6.21 - 7.0.4, 7.0.6 - 7.2.0
64
Output for 7.0.5
Fatal error: Uncaught Error: Call to undefined function bcsub() in /in/JA4Dd:10 Stack trace: #0 /in/JA4Dd(24): maxBit() #1 {main} thrown in /in/JA4Dd on line 10
Process exited with code 255.
Output for 5.5.29 - 5.5.30, 5.5.34, 5.6.13 - 5.6.15, 5.6.20
Fatal error: Call to undefined function bcsub() in /in/JA4Dd on line 10
Process exited with code 255.