view.php

<?php
include("dbcon.php");
$id = 0;
if( isset($_GET['id']) )
	$id = (int)$_GET['id'];
$data = array();
if( $id ) {
	$sql = "select * from posts where id={$id}";
	if( $rs = $db->query($sql) ) {
		$data = $rs->fetch(PDO::FETCH_ASSOC);
	}
}
$json = json_encode($data);
echo $json;