3v4l.org

run code in 500+ PHP versions simultaneously
<?php print \bin2hex(\pack("d", 0.0)) . "\n"; print \bin2hex(\pack("d", -0.0)) . "\n"; print \bin2hex(\pack("d", -1.0 * 0.0)) . "\n";
Output for 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
0000000000000000 0000000000000080 0000000000000080
preferences:
93.66 ms | 1512 KiB | 4 Q