Codeigniter 2.1 - counting the array before get - php

Question

I have this function:
function gi_get_by($col,$id, $itd, $tbl, $limit = 10)
{
$this->db->select('*');
$this->db->from('global_info');
$this->db->join($tbl, 'id_' . $tbl . ' = id_global_info');
$this->db->where('info_type_id', $itd);
if($col == 'date_created' || $col == 'tag') {$this->db->like($col, $id);}
else {$this->db->where($col, $id);}
if($tbl == 'ad') :
$this->db->order_by('paid', 'desc');
endif;
$this->db->order_by('date_created', 'desc');
$this->db->limit($limit, $this->uri->segment(2));
$q = $this->db->get();
return $q = $q->result_array();
}
What I need is to count number of results before limit and to use them later in controller. I have an idea to duplicate this function without $limit but then it will be duplicating the same function. Is there another way to do this or I have to go with duplication?

Answer 1

I don't quite understand what you want to do but if you want an optional limit you can default it to false:
function gi_get_by($col,$id, $itd, $tbl, $limit=false)
{
$this->db->select('*');
$this->db->from('global_info');
$this->db->join($tbl, 'id_' . $tbl . ' = id_global_info');
$this->db->where('info_type_id', $itd);
if($col == 'date_created' || $col == 'tag') {$this->db->like($col, $id);}
else {$this->db->where($col, $id);}
if($tbl == 'ad') :
$this->db->order_by('paid', 'desc');
endif;
$this->db->order_by('date_created', 'desc');
if ($limit) {
$this->db->limit($limit, $this->uri->segment(2));
}
$q = $this->db->get();
return $q = $q->result_array();
}
This will conditionally add limit clause if it is passed in to the function.
Also it would be best to pass in wwhatever $this->uri->segment(2) into the function as a parameter instead of accessing it from within the function.

Answer 2

Why not select
sql_calc_found_rows
in your query?
http://www.justincarmony.com/blog/2008/07/01/mysql-php-sql_calc_found_rows-an-easy-way-to-get-the-total-number-of-rows-regardless-of-limit/

Answer 3

Well, how about something like this:
function gi_get_by($col,$id, $itd, $tbl, $limit = 10)
{
$count = $this->db->query('SELECT * FROM my_table')->num_rows();
//the rest stuff
}

Answer 4

You should use Active Record Cache:
http://codeigniter.com/user_guide/database/active_record.html#caching
function gi_get_by($col,$id, $itd, $tbl, $limit = 10)
{
// Start the cache
$this->db->start_cache();
$this->db->select('*');
$this->db->from('global_info');
$this->db->join($tbl, 'id_' . $tbl . ' = id_global_info');
$this->db->where('info_type_id', $itd);
if($col == 'date_created' || $col == 'tag') {$this->db->like($col, $id);}
else {$this->db->where($col, $id);}
if($tbl == 'ad') :
$this->db->order_by('paid', 'desc');
endif;
$this->db->order_by('date_created', 'desc');
// Stop the cache
$this->db->stop_cache();
// Get the total
$total = $this->db->count_all_results();
// Now set the limit
$this->db->limit($limit, $this->uri->segment(2));
$q = $this->db->get();
// Important! Clear the cache
$this->db->flush_cache();
return $q = $q->result_array();
}