3v4l.org

run code in 300+ PHP versions simultaneously
<?php function show($v) { echo "$v\n"; } for($i = 0; $i < 1000; $i++) { if (pow(2, $i) !== 1 << $i) { show(pow(2, $i)); show(1 << $i); break; } }
Output for 4.3.6 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.3.6
9.2233720368548E+18 -9223372036854775808
Output for 4.3.0 - 4.3.5
1.844674407371E+19 1
preferences:
231.83 ms | 401 KiB | 424 Q