- substr: documentation ( source)
<?php
$a="1N2986B M4S011N2986B 000000001100000000000000000000000000001000000000000000000000000000000Y";
$c = intval(substr($a, 76, 10));
//echo $c;
$pack = intval(substr($a, 86, 9));
echo $pack;
?>