Want to delete a particular row. how to fetch the id?

$html="";
$sql="SELECT * FROM tiger;";
$rs=mysql_query($sql);
while($row=mysql_fetch_array($rs)){

    $html.=
            '<tr><td align="left"><img src="'.$row['image'].'" width="200" height="150" /></td>
                <td align="center" style="font:bold">'.$row['name'].' </td>
            <td align="center"><input type="submit" name="Submit" value="Delete" />
            <input name="id" type="hidden" value="'.$row['id'].'" /> </td>

            </tr>'
            ;
    }
if($_REQUEST['Submit']){

$sql1="delete image from tiger where id='".$_REQUEST['id']."'";
$query=mysql_query($sql1);
}

Now this $html is echoed afterwards. so in output im getting 1st rhe image, then d name of the image and then a button. now what i want is wen i click the delete button the respective row is delete开发者_StackOverflow中文版d from database. which is not happening in the above code as it is unable to fetch the respective id. so pleaser help how can i do that?

Did you add a form element to this table? I replaced $_REQUEST by $_POST, try to avoid using $_GET. A malicious user who knows your delete URL could trick you to click a link (e.g. tinyurl), which opens another set of links: the page deleting all your records. Try this:

$html="";
$sql="SELECT * FROM tiger;";
$rs=mysql_query($sql);
if(!$rs){
    echo 'Query failed...';
    // and log the error, mysql_error()
}
while($row=mysql_fetch_array($rs)){

    $html .=
            '<tr><td align="left"><img src="'.urlencode($row['image']).'" width="200" height="150" /></td>
                <td align="center" style="font:bold">'.htmlentities($row['name']).' </td>
            <td align="center"><form action="" method="post"><input type="submit" name="Submit" value="Delete" />
            <input name="id" type="hidden" value="'.$row['id'].'" /></form> </td>

            </tr>'
            ;
    }
if($_POST['Submit'] && isset($_POST['id']) && ctype_digit($_POST['id'])){

$sql1="delete image from tiger where id='".$_POST['id']."'";
$query=mysql_query($sql1);
if(!$query){
   echo 'Error....';
   //and log mysql_error() somewhere
}
else{
   echo 'Deletion succesful';
}

In your HTML you have as many hidden fields as you have rows in your database, ALL of them with the name "id".

For a quick fix, use a regular link and use the GET-parameter, like this <a href="' . $_SERVER['PHP_SELF'] . '?id=' . $row['id'] . '">delete</a>.

If you really want to use buttons, you'll have to add a form tag around each of your buttons.