3v4l.org

run code in 300+ PHP versions simultaneously
<?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, $array_aux); sort($array); print_r($array);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => 1 [1] => 4 [2] => 7 [3] => 20 [4] => 21 [5] => 22 [6] => 23 [7] => 24 [8] => 25 [9] => 31 [10] => 46 [11] => 47 [12] => 48 [13] => 100 )
preferences:
252.24 ms | 406 KiB | 361 Q