3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '12d8'; $a++; $a++; $a++; $a++; $a--; $a--; $a--; $a--; var_dump($a);
Output for 5.3.7 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 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
float(10)
preferences:
164.27 ms | 404 KiB | 253 Q