3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $count = 0; function p($x, &$count) { $count++; if ($x<= 2) { return 2; } else { return p($x-1)+p($x-2) -1; } } var_dump(p(p(5, $count), $count)); echo $count;
based on PFrT7
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught ArgumentCountError: Too few arguments to function p(), 1 passed in /in/HXlmM on line 10 and exactly 2 expected in /in/HXlmM:5 Stack trace: #0 /in/HXlmM(10): p(4) #1 /in/HXlmM(14): p(5, 1) #2 {main} thrown in /in/HXlmM on line 5
Process exited with code 255.
Output for 5.3.19 - 7.0.20
Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 Warning: Missing argument 2 for p(), called in /in/HXlmM on line 10 and defined in /in/HXlmM on line 5 Notice: Undefined variable: count in /in/HXlmM on line 6 int(9) 2