3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '7.1'; $b = '7.1' . str_repeat('0', 14) . '1'; print "$a\n$b\n"; var_dump($a===$b); $b = '7.1' . str_repeat('0', 15) . '1'; print "$b\n"; var_dump($a===$b);
Output for 4.3.0 - 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 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
7.1 7.1000000000000001 bool(false) 7.10000000000000001 bool(false)
preferences:
213.39 ms | 406 KiB | 328 Q