3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(0.001 + '1.0E-16');
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14
float(0.0010000000000001)
preferences:
93.11 ms | 406 KiB | 5 Q