3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(ini_set('serialize_precision', 17)); var_dump(json_encode(0.1)); var_dump(ini_set('serialize_precision', 14)); var_dump(json_encode(0.1));
Output for 7.1.0 - 7.1.33, 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 - 8.1.29, 8.2.0 - 8.2.22, 8.3.0 - 8.3.10
string(2) "-1" string(19) "0.10000000000000001" string(2) "17" string(3) "0.1"
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
string(2) "17" string(3) "0.1" string(2) "17" string(3) "0.1"
preferences:
85.37 ms | 407 KiB | 5 Q