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run code in 150+ php & hhvm versions
Bugs & Features
<?php $in = [ '2,24', '2,2,9,12' ]; $out = []; foreach($in as $item) { $norm = explode(',', $item); $ar = array_count_values($norm); $pos = []; $out[] = &$pos; array_walk($ar, function ($val, $key) use(&$pos) { if($val > 1) { $pos[] = $key . '(' . $val . ')'; } else { $pos[] = $key; } }); unset($pos); } foreach($out as $listItem) { echo implode(',', $listItem) , PHP_EOL; }
Output for 5.4.0 - 7.1.0
2,24 2(2),9,12
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/XGXNQ on line 3
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 '[' in /in/XGXNQ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/XGXNQ on line 3
Process exited with code 255.