อยากทราบวิธีการ insert ข้อมูล หลาย ๆ ข้อมูลพร้อมกันครับ

<?php
session_start();
$path = "../../../include/";
include($path."database_info.php");

echo $select_box =  $_POST["select_box"];
echo $process = $_POST["process"];
echo $iddd = $_POST["uidd"];
//exit();
?>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<?php
if($process == "submituser"){
foreach($select_box as $index => $value){
		$sql_select = "SELECT a.STUDENT_GROUP_ID,b.UID,c.STATUS_COOP FROM STUDENT_GROUP a
						   INNER JOIN GROUPS b ON a.STUDENT_GROUP_ID = b.STUDENT_GROUP_ID 
						   INNER JOIN USER c ON b.UID = c.UID
						   WHERE a.STUDENT_GROUP_ID = '".$value."' AND c.STATUS_COOP = '0'";
		$query_select = $db->query($sql_select);	
		$row_select  = $db->rows($sql_select);
		$rec_select = $query_select->fetch(PDO::FETCH_ASSOC);
		
		for($i=0;$i<=$row_select;$i++){
		$array_set = array(
					UID => $rec_select["UID"],
					TERM_CODE => $term_n,
					YEAR_CODE => $year_n
		);
		$db->insert($array_set," coop ");
		
		$sql1 = (" select COOP_ID from COOP		
				 ORDER BY COOP_ID DESC ");
		$query1 = $db->query($sql1); 
		$row1  = $db->rows($sql1);
		$checkftoeic = $query1->fetch(PDO::FETCH_ASSOC);
	
		$insert_reg = array(
					REG_COOP_ID =>  $term_n.$year_n,
					UID => $rec_select["UID"],
					TERM_CODE => $term_n,
					YEAR_CODE => $year_n,
					CALENDAR_REG_ID => $calendar_reg_id,
					COOP_ID => $checkftoeic["COOP_ID"]
					);
					$db->insert($insert_reg," reg_coop ");
					
		$sql = (" select COOP_ID from coop
				 ORDER BY COOP_ID DESC ");
		$query = $db->query($sql); 
		$row  = $db->rows($sql);
		$checkid = $query->fetch(PDO::FETCH_ASSOC);
		
		$insert_coop_sco = array(
					COOP_ID => $checkid["COOP_ID"]
					);
					$db->insert($insert_coop_sco," coop_sco ");
	}
}
	echo "<script>alert('อนุมัติการลงทะเบียนเรียบร้อยแล้ว');window.location.href = '../admin_possibility_precoop.php';</script>";
}