3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1,2,1,3,2,1,3,2,1,3,2,1,2,3,1,2,3); echo implode(" ", $a) . "\n"; $first = 0; $last = sizeof($a) - 1; foreach($a as $k => $v) { // echo "Found $v at index $k\n"; if ($v == 1) { swap($k, $first); } if ($v == 3) { swap($k, $last); } } echo implode(" ", $a) . "\n"; function swap(&$arr, $k1, $k2) { $tmp = $arr[$k2]; $arr[$k2] = $arr[$k1]; $arr[$k1] = $tmp; }
Output for 7.1.0
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 Fatal error: Uncaught ArgumentCountError: Too few arguments to function swap(), 2 passed in /in/gpGeu on line 12 and exactly 3 expected in /in/gpGeu:21 Stack trace: #0 /in/gpGeu(12): swap(0, 0) #1 {main} thrown in /in/gpGeu on line 21
Process exited with code 255.
Output for 7.0.0 - 7.0.14
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3
Output for hhvm-3.10.0 - 3.12.0
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: swap() expects exactly 3 parameters, 2 given in /in/gpGeu on line 23 1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3
Output for 5.1.0 - 5.6.28
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 12 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap(), called in /in/gpGeu on line 15 and defined in /in/gpGeu on line 21 Notice: Undefined variable: k2 in /in/gpGeu on line 23 Notice: Undefined variable: k2 in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3
Output for 4.3.0 - 5.0.5
1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 Warning: Missing argument 3 for swap() in /in/gpGeu on line 21 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 24 Warning: Cannot use a scalar value as an array in /in/gpGeu on line 25 1 2 1 3 2 1 3 2 1 3 2 1 2 3 1 2 3