- mt_rand: documentation ( source)
- in_array: documentation ( source)
<?php
$rst = array(1, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 22, 23, 24, 27, 29, 30, 33, 34, 37);
for ($i = 1; $i <= 39; $i++) {
if (in_array($i, $rst)) {
continue;
}
$arr[] = $i;
}
$a = mt_rand(1, sizeof($arr));
echo $arr[$a-1] . "\n";