Question

My database fields are not populating but the page is confirming that it exists. So the first SQL is working, but the second is not pulling the info. If i take the page check out. It doesn’t find the page and redirects to page_not_found. Am I going about this correctly? What am i doing wrong here?

//get page url and query db
$this_page = $_GET['page'];
$this_page = escape_data($_GET['page']);

//Make sure page exist
$SQL_page_exist = "SELECT page_title FROM learn_more WHERE page_title = '$this_page'";
$SPE_result = mysql_query($SQL_page_exist);
if(mysql_num_rows($SPE_result) == 0) 
{
    echo '<META HTTP-EQUIV="Refresh" Content="0; URL=page_not_found.php">';
}
else {

$SQL = 
   "SELECT  * FROM learn_more AS lm 

INNER JOIN  learn_more_to_reference_key AS lmtrk 
        ON  lm.id = lmtrk.learn_more_id 

INNER JOIN  reference_keys AS rk 
        ON  rk.keys_id = lmtrk.reference_key_id

     WHERE  page_title = '$this_page'";

$result = mysql_query($SQL);

while ($db_field = mysql_fetch_assoc($result));
{   
        $id               =     $db_field['ID'];
        $main_title       =     $db_field['main_title'];
        $main_content     =     $db_field['main_content'];
        $reference_keys   =     $db_field['keys_href']; 
        $sub_title        =     $db_field['sub_title'];
        $sub_content      =     $db_field['sub_content'];
}
}
mysql_close($dbc);

Answer 1

Turns out that an empty field from a relational db table (just 1 black field) which is set to not null was causing this undefined break error.. ON ALL PAGES except the home page..

Thank you to all the people who tried to help me.