3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(ini_get('serialize_precision')); ini_set('serialize_precision', 13); var_dump(ini_get('serialize_precision'));
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(2) "-1" string(2) "13"
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
string(2) "17" string(2) "13"
preferences:
218 ms | 402 KiB | 376 Q