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+--- Thread: Invalid argument supplied for foreach() (/showthread.php?tid=32346)

Invalid argument supplied for foreach() - El Forum - 07-20-2010

[eluser]pipiet06[/eluser]
Hi All..

i have a bug with foreach

Code:
<h4>A PHP Error was encountered</h4>

<p>Severity: Warning</p>
<p>Message:  Invalid argument supplied for foreach()</p>
<p>Filename: ed/summary.php</p>
<p>Line Number: 48</p>

this the models
Code:
function get_data($limit,$start,$query,$fields,$startdate,$enddate,$idsite,$idfleet,$idprefix,$eqplan,$category,$type,$idcomponent)
         {
            if($query)
            {
                $fields = str_replace("[","",$fields);
                $fields = str_replace("]","",$fields);
                $fields = str_replace("\"","",$fields);
                $fields = explode(",",$fields);
                $search = array();
                foreach  ($fields as $fd)
                {
                    $search[$fd] = $query;
                }
                
                $query = $this->db->query("SELECT a.*, b.description
                                            FROM tblvims_summary a
                                            LEFT JOIN tblid_event AS b ON b.id = a.id_event
                                            OR_LIKE $search
                                            LIMIT $start,$limit"
                                        );
                return ($query->num_rows() > 0) ? $query->result_array() : FALSE;
            }
            else
            {
                $query = $this->db->query("SELECT a.*, b.description
                                            FROM tblvims_summary a
                                            LEFT JOIN tblid_event AS b ON b.id = a.id_event
                                            where startdate='$startdate' AND enddate='$enddate' AND idsite='$idsite' AND
                                            idfleet='$idfleet' AND idprefix='$idprefix' AND eqplan='$eqplan' AND
                                            category='$category' AND a.type='$type' AND a.idcomponent='$idcomponent'
                                            LIMIT $start,$limit"
                                        );
                return ($query->num_rows() > 0) ? $query->result_array() : FALSE;
            }
        }

this is the controllers
Code:
function get_data() {
            $limit = ($this->input->post('limit'))? $this->input->post('limit'):10;
            $start = ($this->input->post('start'))? $this->input->post('start'):0;
            
            $query = $this->input->post('query');
            $fields = $this->input->post('fields');
            
            $startdate = $this->input->post('startdate');
            $enddate = $this->input->post('enddate');
            $idsite = $this->input->post('idsite');
            $idfleet = $this->input->post('idfleet');
            $idprefix = $this->input->post('idprefix');
            $eqplan = $this->input->post('eqplan');
            $category = $this->input->post('category');
            $type = $this->input->post('type');
            $idcomponent = $this->input->post('idcomponent');
            
            // echo"$limit, $start";
            // exit;
            $this->load->model('ed/MSummary');
            $query = $this->MSummary->get_data($limit,$start,$query,$fields,$startdate,$enddate,$idsite,$idfleet,$idprefix,$eqplan,$category,$type,$idcomponent);
            $total = count($query);
            $rowData = array("total"=>$total);
            if($total > 0){
                foreach ($query as $row){
                    $rowData['rows'][] = array(
                        'idvims_summary'=>$row['idvims_summary']
                        ,'startdate'=>$row['startdate']
                        ,'enddate'=>$row['enddate']
                        ,'idsite'=>$row['idsite']
                        ,'idfleet'=>$row['idfleet']
                        ,'idprefix'=>$row['idprefix']
                        ,'eqplan'=>$row['eqplan']
                        ,'category'=>$row['category']
                        ,'type'=>$row['type']
                        ,'idcomponent'=>$row['idcomponent']
                        ,'id_event'=>$row['id_event']
                        ,'description'=>$row['description']
                        ,'rating'=>$row['rating']
                    );
                }
            }
            else{
                $rowData['rows'] = "";
            }
            echo json_encode($rowData);
        }



How can I achieve this problem.?
can someone help me?


Thanks before :lol:

Invalid argument supplied for foreach() - El Forum - 07-21-2010

[eluser]davidbehler[/eluser]
Quote:If var is not an array or an object with implemented Countable interface, 1 will be returned. There is one exception, if var is NULL, 0 will be returned.
from http://php.net/manual/en/function.count.php

That being said, your error is quite easy to fix.
Your model returns either an array or FALSE. count() will return the number of elements in your array or 1 if the returned values from your model is FALSE.

Instead of
Code:
if($total > 0){
}
I would use
Code:
if(is_array($query) {
}
or
Code:
if($total > 0 AND $query !== FALSE){
}

Hope that helps.