3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "Unsigned and Signed:\n"; $offset = abs(~0xffffffff) + 2 + 4294967295; printf("%f\n",PHP_INT_MAX * 2 + 1); printf("%d\n",~$offset);
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.3.7
Unsigned and Signed: 18446744073709551616.000000 -8589934594
Output for 4.4.0 - 4.4.9, 5.0.5, 5.1.0 - 5.1.6, 5.2.0
Unsigned and Signed: 18446744073709552000.000000 -8589934594
Output for 4.3.0 - 4.3.11, 5.0.0 - 5.0.4
Unsigned and Signed: Notice: Use of undefined constant PHP_INT_MAX - assumed 'PHP_INT_MAX' in /in/KWR17 on line 6 1.000000 -8589934594
preferences:
280.49 ms | 402 KiB | 458 Q