Navigating in a table and delete row

**webtechmyloo** · Nov 4, 2009, 10:15

Hi!

This is what I want to do:

At the moment I have a table and I can navigate to a page where I can delete rows.

What I want is that on the page where you can delete rows, I want to have two images (two arrows, one up and one down) which can navigate in the table. When going to the page where you can delete rows, the buttom row should initially be selected. Then you can navigate through the rows and delete the selected row, using the "Delete selected row".

If this could help
Delete function:

PHP Code:


<?php

/* 

    DELETE.PHP

    Deletes a specific entry from the 'players' table

*/



    // connect to the database

    include('connect-db.php');

    

    // check if the 'id' variable is set in URL, and check that it is valid

    if (isset($_GET['id']) && is_numeric($_GET['id']))

    {

        // get id value

        $id = $_GET['id'];

        

        // delete the entry

        $result = mysql_query("DELETE FROM players WHERE id=$id")

            or die(mysql_error()); 

            

        // redirect back to the view page

        header("Location: view.php");

    }

    else

    // if id isn't set, or isn't valid, redirect back to view page

    {

        header("Location: view.php");

    }

        

?>

View file:

PHP Code:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

    <title>View Records</title>

</head>

<body>



<?php

/* 

    VIEW.PHP

    Displays all data from 'players' table

*/



    // connect to the database

    include('connect-db.php');



    // get results from database

    $result = mysql_query("SELECT * FROM players") 

        or die(mysql_error());  

        

    // display data in table

    echo "<table border='1' cellpadding='10'>";

    echo "<tr> <th>ID</th> <th>First Name</th> <th>Last Name</th> <th></th> <th></th></tr>";



    // loop through results of database query, displaying them in the table

    while($row = mysql_fetch_array( $result )) {

        

        // echo out the contents of each row into a table

        echo "<tr>";

        echo '<td>' . $row['id'] . '</td>';

        echo '<td>' . $row['firstname'] . '</td>';

        echo '<td>' . $row['lastname'] . '</td>';

        echo '<td><a href="edit.php?id=' . $row['id'] . '">Edit</a></td>';

        echo '<td><a href="delete.php?id=' . $row['id'] . '">Delete</a></td>';

        echo "</tr>"; 

    } 



    // close table>

    echo "</table>";

    echo '<p><a href="delete_all.php?lastname=' . 10 . '">Delete All</a></p>';

?>

<p><a href="new.php">Add a new record</a></p>



</body>

</html>

Best regards,
Johan

**Shrapnel_N5** · Nov 4, 2009, 10:25

Why do you need such complicated desidn?
Yes, it can be done with both PHP and Javascript (preferred)
But why don't you make it as simple, as just button "Delete" on each row?
One click action. No arrows, no moves.

**webtechmyloo** · Nov 4, 2009, 10:30

I´m going to do a user test on an old system, so at the moment I have to do a replication. Would be nice to have some help=) Thank you very much for your reply!

Edit: It should use PHP

**Shrapnel_N5** · Nov 4, 2009, 10:38

*shrug*
This can be easily done with PHP.
As simple as schoolbook's pagination example.
Just put a link on the arrow which carries something like highlight=$hid
where $hid is id for line to be highlightd after pressing arrow.

When output your table, just compare $row['id'] to $_GET['highlight'] and if matched, change coloe of the row.

I didn't get the point of such an interface anyway.

**webtechmyloo** · Nov 4, 2009, 10:48

I get what you´re saying. Because the user can add and delete as he wants, the id of the rows will always be different from time to time.

So at first the highlighted row when going to the page should be the latest id, then the biggest.
Do you know what code to use?

I don´t understand how it works to link the arrow. Because it it starts to highlight the buttom row ID(max) then when clicking on the upper arrow, it should link to ID(max)-1 and then, newt tim it should link to ID(max)-2... etc.

Would be nice to have some help with coding, I´m kind of a noob..

Thanks for your reply!!

**Shrapnel_N5** · Nov 4, 2009, 11:03

Never do arithmetical operations to id. It is not a number. Consider it is string with no meaning. Cause it is.

If id changed so fast, pass relative position on the table. set it to table height at first and now you can do that math, +1 -1 stuff.

When output table do an increment on counter varibale and compare it with passed value.

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