Active Record WHERE Query not getting a field - php

Question

I am trying a "Keyword" search. I am looking in the fields ARTWORK_title and ARTWORK_keywords. The ARTWORK_keywords field is where the user can enter multiple tags to search on.
I have built a query up and feel this is the right way, But I am just not getting ARTWORK_title passed back through in the DB Query.
My PHP Function is as follows....
$my_keywords = explode(",", $search_string);
$searchfields = array('ARTWORK_title', 'ARTWORK_keywords');
$this->db->select('*');
$this->db->from('artwork');
$this->db->where('ARTWORK_status', '1');
//$where_string = '(';
foreach($my_keywords as $keyword)
{
foreach($searchfields as $field)
{
$where_string = $field . ' LIKE \'%' . $keyword . '%\' ';
}
//$where_string .= substr($where_string, 4) . ')';
$this->db->where($where_string);
}
However when profiling the SQL Query I am getting the following MySQL Query back....
SELECT *
FROM (artwork)
WHERE ARTWORK_status = '1'
AND ARTWORK_keywords LIKE '%Blue%'
AND ARTWORK_keywords LIKE '%Orange%'
It is just not getting the ARTWORK_title field in the query at all.
Any ideas where I am going wrong?
Many Thanks in advance.

Answer 1

You are erasing the $where_string value with each iteration.
Modify it like this:
$where_string = '';
$counter = 0;
foreach($my_keywords as $keyword)
{
foreach($searchfields as $field)
{
if ($counter > 0) {
$where_string .= ' AND ';
}
$where_string .= $field . ' LIKE \'%' . $keyword . '%\' ';
$counter++;
}
}