3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $value = 15; $highMap = 0xffffffff00000000; $lowMap = 0x00000000ffffffff; $higher = ($value & $highMap) >>32; $lower = $value & $lowMap; $packed = pack('NN@64', $higher, $lower); list($higher, $lower) = array_values(unpack('N2', $packed)); $originalValue = $higher << 32 | $lower; var_dump($originalValue); var_dump($originalValue == $value); var_dump(PHP_INT_SIZE == 8);
Output for 4.4.0 - 4.4.9, 5.0.5 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(15) bool(true) bool(true)
Output for 4.3.0 - 4.3.11, 5.0.0 - 5.0.4
int(15) bool(true) bool(false)