i have created a page which has a table that enables user to delete a record via a delete button but somehow the queary isnt working.

php coding



$idURL = $_GET['id'];

// Connect to database server
mysql_connect("localhost", "root", "") or die (mysql_error ());

// Select database
mysql_select_db("studiobooking") or die(mysql_error());

// The SQL statement that deletes the record
$query = "DELETE FROM studio WHERE id = '$idURL'";
$result = mysql_query($query);

 echo ('<script type="text/javascript">alert("Record is Deleted !");
                    window.location = "BookingnDisplay.php"</script>');

// Close the database connection

the part that doesnt work:

$query = "DELETE FROM studio WHERE id = '$idURL'";
$result = mysql_query($query);

but the if($result) runs.

any ideas? thanks in advance!

4 Years
Discussion Span
Last Post by diafol

Don't use this on a live site!

Without login/session and input sanitizing, you could lose all your data or worse still you could have all your data exposed by SQL injection.

Check for the number of affected rows.


i don't understand. how does this solve my problem?

If number of affected rows equals 0 no rows were deleted. That might be the case if no rows matched $idURL.

But to check there are no other issues, use simple debugging technique - insert this code right after line 14:


This will display the query as in its final form and stop the script. Now inspect the query or copy it to phpmyadmin and test it.

And take a note from the previous post: do clean the data received from the GET. And drop the mysql extension - switch to mysqli.

Edited by broj1


i don't understand. how does this solve my problem?

As broj1 has elucidated,


will give you the number of rows deleted. I hope that's clear enough for you.

The other info was there to help you avoid the pitfalls of noob security issues.

Edited by diafol

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