No success executing foreach - php

Question

I wrote a following PHP+codeigniter code:
$msg = $this->db->get('Messages');
$curDate = date('Y-m-d H:i:s');
$array = array('IsRead =' => 0, 'Date <=' => $curDate);
$this->db->where($array);
$this->db->set(array('IsRead' => 1));
$this->db->update('Messages');
Which basically checks which records in Messages table meet the two conditions regarding fields IsRead and Date, and then updates only those records.
Now I would like to pick up every Date value that meets said criteria and execute some PHP code for it. I suppose it's a job that foreach directive could manage, but I have no success coding it.
Could I ask for some help.

Answer 1

Try following code, hope will help....
$curDate = date('Y-m-d H:i:s');
$array = array('IsRead' => 0, 'Date <=' => $curDate);
$this->db->where($array);
$this->db->set('IsRead',1));
$this->db->update('Messages');
if ($this->db->affected_rows()>0) {
echo "Update successful";
}
else
{
echo "No any row updated";
}

Answer 2

So, the answer seems to be:
$curDate = date('Y-m-d H:i:s');
$array = array('IsRead =' => 0, 'Date<=' => $curDate);
$this->db->where($array);
$msg = $this->db->get('Messages');
foreach ($msg->result() as $row)
{
echo $row->Date . " "; //here goes the PHP code
}
$this->db->where($array);
$this->db->set(array('IsRead' => 1));
$this->db->update('Messages');