Something is wrong with my custom php function

Question

Okay so I am trying to create a custom function that will echo a site url inside an iframe for the end user.

The script has to check whether or not the user has already

Answer 1

i would not run two queries and try to merge the result array. you can use mysql itself to just return the sites that have not been seen yet:

SELECT sites.site_url FROM sites
LEFT JOIN views ON views.site_url=sites.site_url AND views.user='$currentUsername'
WHERE sites.site_url IS NOT NULL AND views.site_url IS NULL

This will return only site_urls from sites, that have no entry in the views table. The LEFT JOIN will join the two tables and for every non-matching row there will be NULL values in the views.site_url, so that is why i am checking for IS NULL.

Your saving of $urlToShow should work, if you set to $row field content and not $row itself as suggested, but if you want to check what is in the variable, don't use echo use this:

print_r($urlToShow);

If the variable is an array, you will see it's content then.