<?php
$string = '1, 4, 7, 20-25, 31, 46-48, 100';
$array = array_map('trim', explode(',', $string));
$array_aux = array();
for ($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);
preferences:
26.34 ms | 402 KiB | 5 Q