สอบถามเรื่องการ select ข้อมูลแบบ array หน่อยครับ พอดีไม่รู้จะเริ่มยังไง (มีcodeที่เขียนไว้ให้ดูครับ)

<?php

$objConnect = mysql_connect("localhost","root","root");
	$objDB = mysql_select_db("mydb");

	$strMemberID = "1";
	$i=0;
	$strSQL1 = "SELECT resultknn FROM members WHERE 1 AND memberID = '".$strMemberID."'  ";
	$objQuery1 = mysql_query($strSQL1);
	$obResult1 = mysql_fetch_array($objQuery1);

		//echo $obResult1[0];
		if ($obResult1[0] ==  "Food and Drink"){
				$i = 1;
	 			}
 			else if ($obResult1[0] ==  "Bag"){
				$i = 2;
 			}
 			else if ($obResult1[0] ==  "Clothes"){
				$i = 3;
 			}
 			else if ($obResult1[0] ==  "Travel"){
				$i = 4;
 			}
 			else if ($obResult1[0] ==  "Others"){
				$i = 5;
 			}
 			
 	$strSQL = "SELECT proID,proName,address,imgpath, DATE_FORMAT(startpro, '%d %b') startpro,DATE_FORMAT(endpro, '%d %b %Y') endpro FROM promotions WHERE 1 AND endpro>DATE(NOW()) AND typeID = $i ";
	$objQuery = mysql_query($strSQL);
	$intNumField = mysql_num_fields($objQuery);
	$resultArray = array();
	while($obResult = mysql_fetch_array($objQuery))
	{
		$arrCol = array();
		for($i=0;$i<$intNumField;$i++)
		{
			$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
		}
		array_push($resultArray,$arrCol);
	}
	
	mysql_close($objConnect);
	
	echo json_encode($resultArray);
?>