php按钮值问题

I am brand new to PHP and have run into an issue with my buttons in a table. When the button is clicked, it needs to get an ID number that is pulled from a database. I have no trouble getting the data and passing it to the next page using...

<form action="ThisPage.php" method="post">
    <td><input name="Submit" type="submit" value=<?php echo $OrderNumber; ?> ></td>
</form>

Everything works perfectly, except that the $OrderNumber variable shows up on the button itself. I would like the button to display as "Edit", not the $OrderNumber variable that is showing in the attached image.

How could I make the button say "Edit", but apply a posted value of the $OrderNumber value? I have been unable to find a way to accomplish the passing of correct and unique data while also displaying a button that does not confuse the end user.

To get to the next page, I am checking for a posted value at the beginning of the PHP script. If there is a posted value, in this case, $OrderNumber, then the script carries the variables to the next page as shown...

<?php  
    if(!empty ($_POST['Submit']) )
       {
        $_SESSION['OrderID']=$_POST['Submit'];
        header("location:NextPage.php");
        exit;
       }    
?>

But if there is no posted data, the page runs and shows the rows representing the array of database entries. All is well except for this button label.

Try This

<form action="ThisPage.php" method="post">
    <input type="hidden" name="order_id" value="<?php echo $OrderNumber; ?>" />
    <td><input name="Submit" type="submit" value="Edit" /> </td>
</form>

<?php  
    if(!empty ($_POST['Submit']) )
    {
        $_SESSION['OrderID']=$_POST['order_id'];
        header("location:NextPage.php");
        exit;
    }    
?>

add hidden field because we can pass any value in form without display we have to add this method.

Try this:

<?php
session_start();
if(!empty ($_POST['Submit']) )
{
    $_SESSION['OrderID'] = $_POST['Submit'];
    header("location:NextPage.php");
}    
?>

The best way is to use a second element. Your code would look like this:

<form action="ThisPage.php" method="post">
    <td>
        <input type="hidden" name="ordernumber" value="<? =$OrderNumber; ?>" />
        <input name="Submit" type="submit" value="Edit"/>
    </td>
</form>

On the next page, you can now use $_POST['ordernumber']. To use sessions, make sure session_start(); is placed before retreiving or storing and make sure nothing has been printed to the screen, nor any headers have been output before issuing a session_start();

While it was short on explanation, the answer by Bhavin Sasapra worked perfectly.

The answer provided by LPChip was very close, but my script wouldn't run with;

<input type="hidden" name="ordernumber" value="<? =$OrderNumber; ?>" />

I had to use

value="<?php echo $OrderNumber; ?>" />

I am using PHP 5, so that may be the issue. I will be sure to specify should I have another question.

And it turns out that you can open a form inside of a table.