3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $mypi = 3.1415926535897932384626433832795028841971; $pi = pi(); printf("pi: %.24f, %.24f, %.24f\n", $pi, $mypi, M_PI); $l = strlen($mypi); echo "l: $l\n"; $d = pack("d", $mypi); $l = strlen($d); echo "l: $l\n"; $un = unpack("d", $d); $d = end($un); printf("%.24g\n", $d);
based on BqLgs
Output for 5.2.1 - 7.2.0
pi: 3.141592653589793115997963, 3.141592653589793115997963, 3.141592653589793115997963 l: 15 l: 8 3.14159265358979311599796
Output for 4.3.0 - 5.2.0
pi: 3.141592653589793115997963, 3.141592653589793115997963, 3.141592653589793115997963 l: 15 l: 8