3v4l.org

run code in 300+ PHP versions simultaneously
<?phpfunction fantastic3($n) { $series = array(0,1,1,1); for($i=3 ; $i<=$n ; $i++){ $a = (isset($series[ (int)$i-3 ]))?$series[ (int)$i-3 ]:0; $b = (isset($series[ (int)$i-2 ]))?$series[ (int)$i-2 ]:0; $c = (isset($series[ (int)$i-1 ]))?$series[ (int)$i-1 ]:0; $d = ($a+$b+$c)-1; if($d<0){ $d = 0; } $series[$i] = $d; } echo $series[ (int)$n-1 ];}// Do NOT call the fantastic3 function in the code// you write. The system will call it automatically.?>
Output for 5.4.0 - 5.4.32, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.3 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<?phpfunction fantastic3($n) { $series = array(0,1,1,1); for($i=3 ; $i<=$n ; $i++){ $a = (isset($series[ (int)$i-3 ]))?$series[ (int)$i-3 ]:0; $b = (isset($series[ (int)$i-2 ]))?$series[ (int)$i-2 ]:0; $c = (isset($series[ (int)$i-1 ]))?$series[ (int)$i-1 ]:0; $d = ($a+$b+$c)-1; if($d<0){ $d = 0; } $series[$i] = $d; } echo $series[ (int)$n-1 ];}// Do NOT call the fantastic3 function in the code// you write. The system will call it automatically.?>
Output for 8.0.13
Parse error: syntax error, unexpected identifier "fantastic3" in /in/6QJ6c on line 1
Process exited with code 255.
Output for 5.4.34, 7.3.32 - 7.3.33, 7.4.33
Parse error: syntax error, unexpected 'fantastic3' (T_STRING) in /in/6QJ6c on line 1
Process exited with code 255.

preferences:
134.88 ms | 402 KiB | 173 Q