3v4l.org

run code in 300+ PHP versions simultaneously
<?php $sum=(0.5+0.2+0.2+0.1); $sum2 = 1; var_dump('$sum: ', $sum); var_dump('$sum2: ', $sum2); var_dump('$sum == $sum2: ', $sum==$sum2); var_dump('0.5+0.3+0.2+0.0', 0.5+0.3+0.2+0.0);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
string(6) "$sum: " float(0.9999999999999999) string(7) "$sum2: " int(1) string(15) "$sum == $sum2: " bool(false) string(15) "0.5+0.3+0.2+0.0" float(1)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
string(6) "$sum: " float(1) string(7) "$sum2: " int(1) string(15) "$sum == $sum2: " bool(false) string(15) "0.5+0.3+0.2+0.0" float(1)

preferences:
201.77 ms | 405 KiB | 328 Q