DurtyFree February 2016
I don't exactly understand what you are trying to delete.
If you want to actually delete a data / row in your database, you need to use the DELETE Statement as explained here: http://www.w3schools.com/sql/sql_delete.asp
I guess your statement would look something like this:
DELETE FROM REQUESTS
$row['requestid'] is the actual unique key identifier to the data row you would like to delete.
You could create a button / link to the exact page with an GET data (yourpage.php?deleteid=1) to pass the id of the data you would like to delete from the database.
Keep in mind that using GET paratemers isn't the best way to do this. You should rather use a form and POST the regarding id.