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$hostname="localhost";
$databasename="editoncms";
$username="root";
$password="PASSWORT";

try
{
$dbhandler=new PDO('mysql:host='.$hostname.';dbame='.$databasename,$username,$password);
$dbhandler->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);

}

catch(PDOException $errormsg)
{
die($errormsg->getMessage());
}
echo"Databse Connected to MySQL!";

require 'include/bdconnect.php';
    $id=$_GET['edit'];
    // i am fetching id from other page by clicking on edit button.

    if(isset($_GET['edit'])){
    $SQL=$dbhandler->prepare("SELECT * FROM banner WHERE id=?, Title=?, seo=?, images=?");
            $SQL->bindParam(1, $id, PDO::PARAM_INT);
            $SQL->bindParam(2, $title, PDO::PARAM_STR);
            $SQL->bindParam(3, $seo, PDO::PARAM_STR);;
            $SQL->bindParam(4, $img_final, PDO::PARAM_STR);
            $SQL->execute();
    }

<body>
<div class="cont">
<form action="" method="post" enctype="multipart/form-data">
<input class="input-text" type="text" name="title" value="<?PHP print $title ; ?>" />
<input class="input-text" type="text" name="seo" value="<?PHP print $seo ; ?>" />
<input class="upload-img" type="file" name="imgupload" >
<input class="submit-btn" type="submit" name="update" value="UPDATE BANNER" />
</form>
<p style="color:#FFF; clear:both; font-size:14px; margin-top:80px; line-height:0;">Current Image :</p><img src="../images/<?PHP print $img_final ; ?>" width="256" height="110" alt="" style="background:#FFF; padding:2px; margin:0;">
</body>