PHP IF statement not taking variable into account!

I have a tabled view in a while loop, where a user can view information on books.

For example, book ISBN, book name, read status...

Basically, when the user sets their 'readstatus' to 'complete' I want that specific table row to become grey! The logic is very straight forward, however I can't get my IF statement to recognise this:

if ($readstatus == 'complete')开发者_如何学运维 {
                        echo '<tr class="completed">';
              }

                    else if  ($readstatus != 'complete') {
                        echo '<tr class="reading">';
              } 

I'm obviously doing something wrong here, table content to change if the value of 'readstatus' = 'complete', if not, then output is the default

Why are you using $_GET? Does this information come from an HTML form or a URL etc... ?

I suspect you meant to change $readstatus = $_GET['readstatus']; to $readstatus = $row['readstatus'];.

$_GET is an aray of GET parameters which come from the query string.

$row is a row in your database, so if the information is in the database - which I suspect it is - you want to use $row instead of $_GET.

Try changing $readstatus = $_GET['readstatus']; to $readstatus = $row['readstatus'];

The $_GET function relies on the value being contained in the query string of the URL, and it has nothing to do with the database. I have a hunch you're trying to get the value from the database here and you're using the wrong function to do it.

$_GET['readstatus'] says the value is coming from the browser. $row['readstatus'] says the value is coming from the database.

You need to decide which should take precedence-- probably the $_GET['readstatus']` because it's what the user wants to change. If that's the case, you need to update your database with the new readstatus before you requery the db for the dataset.