Question

I know I do many, many things wrong in this, but I don’t have a clue how to fix this (except making many separate queries.

mysql_query(    'SELECT *
        FROM opdracht
        where'. if(isset($opleiding))
                {   
                    'opleiding = "'.$opleiding.'" and'

                }

                if(isset($duur))
                {
                    'duur = "'.$duur.'" and '

                }

                if(isset($type))
                {
                    'type = "'.$type.'" and'

                }
        ' gevuld ="nee";');

basically, what I’m trying to do is making a query which statements depends on the variables.
This code doesn’t work, but I can’t think of a way to make it work.
Help?

Answer 1

if (isset($opleiding)) { $opleiding = 'opleiding = "'.$opleiding.'" and'; } else { $opleiding = ""; }
if (isset($duur)) { $duur= 'duur= "'.$duur.'" and'; } else { $duur= ""; }
if (isset($type)) { $type= 'type= "'.$type.'" and'; } else { $type= ""; }

$query = "SELECT * FROM optdracht WHERE $oplediding $duur $type gevuld ='nee';"

mysql_query($query);

Set them outside, and then use them inside the query. Also, you should be checking for errors. (I don’t remember how to do so in mysql_query() as it is very old and I don’t use it. If someone knows please edit my answer)