レストランリストページの変更

<?php

include "inc/admin_session.php";

$idx = $_GET["idx"];

include "../inc/dbcon.php";

$sql = "select * from restaurants where idx=$idx;";
$result = mysqli_query($dbcon,$sql);

$array = mysqli_fetch_array($result);

<?php

session_start();
$idx = $_POST["idx"];
echo $idx;
$restaurantName = $_POST["restaurantName"];
$instaId = $_POST["instaId"];
$categori = $_POST["categori"];
$addr1 = $_POST["address"];
$addr2 = $_POST["detailAddress"];
$addr3 = $_POST["extraAddress"];
$addr1 = $addr1.$addr3;

echo "식당 이름 : ".$restaurantName."<br>";
echo "Instagram ID : ".$instaId."<br>";
echo "카테고리 : ".$categori."<br>";
echo "기본주소 : ".$addr1."<br>";
echo "상세주소 : ".$addr2."<br>";

include "../inc/dbcon.php";

	$sql = "update restaurants set restaurantName = '$restaurantName', instaId = '$instaId', categori = '$categori', addr1 = '$addr1', addr2 = '$addr2' where idx = $idx;";

echo $sql;

mysqli_query($dbcon,$sql);

mysqli_close($dbcon);