3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function doStuff() { $last = 0; $current = 1; echo "l, c: $last, $current\n"; yield 1; while ($current < 10000) { echo "l, c: $last, $current\n"; $current = $last + $current; $last = $current - $last; yield $current; echo "l, c: $last, $current\n"; } } foreach(doStuff() as $num) $num; ?>
based on ACATR
Output for 5.5.24 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
l, c: 0, 1 l, c: 0, 1 l, c: 1, 1 l, c: 1, 1 l, c: 1, 2 l, c: 1, 2 l, c: 2, 3 l, c: 2, 3 l, c: 3, 5 l, c: 3, 5 l, c: 5, 8 l, c: 5, 8 l, c: 8, 13 l, c: 8, 13 l, c: 13, 21 l, c: 13, 21 l, c: 21, 34 l, c: 21, 34 l, c: 34, 55 l, c: 34, 55 l, c: 55, 89 l, c: 55, 89 l, c: 89, 144 l, c: 89, 144 l, c: 144, 233 l, c: 144, 233 l, c: 233, 377 l, c: 233, 377 l, c: 377, 610 l, c: 377, 610 l, c: 610, 987 l, c: 610, 987 l, c: 987, 1597 l, c: 987, 1597 l, c: 1597, 2584 l, c: 1597, 2584 l, c: 2584, 4181 l, c: 2584, 4181 l, c: 4181, 6765 l, c: 4181, 6765 l, c: 6765, 10946
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '1' (T_LNUMBER) in /in/j5AAZ on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER in /in/j5AAZ on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_LNUMBER in /in/j5AAZ on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/j5AAZ on line 7
Process exited with code 255.