3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo ' ' . json_encode(round('1.123456789123456789', 10), JSON_NUMERIC_CHECK) . PHP_EOL; echo json_encode('1.123456789123456789');
based on UNQfr
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
1.1234567891 "1.123456789123456789"