$prms = array("A0000", "A0001", "A0002");
$sql = "SELECT * FROM shain_table WHERE shain_id IN (". toMarker($prms) .")";

function toMarker($prms){
$str = '?';
for ($i = count($prms); $i > 1; --$i) $str .= ',?';
return $str;
}