Check it is empty or not in codeigniter - php

Question

I am working in codeigniter.I have created one function in model.The function is like this :
function pr($id)
{
//$query5 = $this->db->query("select max(to_date) as last_date from agent_print_details where agent_id = ".$id);
//$result5 = $query5->result();
$this->db->select('max(to_date) as last_date');
$this->db->from('agent_print_details');
$this->db->where('agent_id',$id);
$result = $this->db->get();
if($result->num_rows()>0)
return $result->result();
else
return "empty";
}
my controller is :
$pr_detail = $this->cashier1_model->pr($role['id']);
if($pr_detail != 0)
{
echo "nisarg";
}
else
{
echo "123";
}
when I print pr_detail then it will display output like this:
Array ( [0] => stdClass Object ( [last_date] => ) )
it will give blank data so it has to print 123 but it is display nisarg.
So What should i have to do to print 123?

Answer 1

If result not found just return FALSE in model file. Also use CI select_max to get max value
MODEL
$this->db->select_max('to_date','last_date');
$this->db->from('agent_print_details');
$this->db->where('agent_id', $id);
$result = $this->db->get();
if ($result->num_rows() > 0) {
return $result->result();
} else {
return FALSE;
}
CONTROLLER
$pr_detail = $this->cashier1_model->pr($role['id']);
if($pr_detail)
{
echo "nisarg";
}
else
{
echo "123";
}

Answer 2

you could use count function, also, do you have defined a table name in get function?
...
$result = $this->db->get('agent_print_details');
//if($result->num_rows() > 0)
if(count($result) > 0)
...

Answer 3

When you use $result->num_rows() > 0 you CANT use $result->result(). If u want to return these results, you need to check if its not empty first, and then query again to get results.
$this->db->select_max('to_date','last_date');
$this->db->from('agent_print_details');
$this->db->where('agent_id', $id);
$result = $this->db->get();
if ($result->num_rows() > 0) {
$this->db->select_max('to_date','last_date');
$this->db->from('agent_print_details');
$this->db->where('agent_id', $id);
$result = $this->db->get();
return $result->result();
} else {
return FALSE;
}