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run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = '1, 4, 7, 20-25, 31, 46-48, 100'; $array = explode(',', $string); $array = array_map('trim', $array); $array_aux = array(); for ($i = 0; $i < count($array); $i++) { if (!is_numeric($array[$i])) { $new_array = explode('-', $array[$i]); for ($j = $new_array[0]; $j <= $new_array[1]; $j++) { array_splice($array_aux, 0, 0, $j); } unset($array[$i]); } } $array = array_merge($array, $array_aux); natsort($array); print_r($array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 1 [1] => 4 [2] => 7 [13] => 20 [12] => 21 [11] => 22 [10] => 23 [9] => 24 [8] => 25 [3] => 31 [7] => 46 [6] => 47 [5] => 48 [4] => 100 )