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<?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 git.master, git.master_jit, rfc.property-hooks
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.

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