Question

Hello I’m using flexigrid and i have a problem, i don’t know why it keeps on saying
Invalid argument supplied for foreach() and Undefined variable: rows I looked at the code it seems right to me , idont know i may have overlooked but can you help me, Thanks

Heres My code.

<?php
$page = isset($_POST['page']) ? $_POST['page'] : 1;
$rp = isset($_POST['rp']) ? $_POST['rp'] : 10;
$sortname = isset($_POST['sortname']) ? $_POST['sortname'] : 'name';
$sortorder = isset($_POST['sortorder']) ? $_POST['sortorder'] : 'desc';
$query = isset($_POST['query']) ? $_POST['query'] : false;
$qtype = isset($_POST['qtype']) ? $_POST['qtype'] : false;


$usingSQL = true;
function runSQL($rsql) {

    $db['default']['hostname'] = "localhost";
    $db['default']['username'] = 'root';
    $db['default']['password'] = "";
    $db['default']['database'] = "testdb";

    $db['live']['hostname'] = 'localhost';
    $db['live']['username'] = 'root';
    $db['live']['password'] = '';
    $db['live']['database'] = 'testdb';

    $active_group = 'default';

    $base_url = "http://".$_SERVER['HTTP_HOST'];
    $base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);

    $connect = mysql_connect($db[$active_group]['hostname'],$db[$active_group]['username'],$db[$active_group]['password']) or die ("Error: could not connect to database");
    $db = mysql_select_db($db[$active_group]['database']);

    $result = mysql_query($rsql) or die ($rsql);
    return $result;
    mysql_close($connect);
}

function countRec($fname,$tname) {
        $sql = "SELECT count($fname) FROM $tname ";
    $result = runSQL($sql);
    while ($row = mysql_fetch_array($result)) {
            return $row[0];
    }
}

$sort = "ORDER BY $sortname $sortorder";
$start = (($page-1) * $rp);

$limit = "LIMIT $start, $rp";

$where = "";
if ($query) $where = " WHERE $qtype LIKE '%".mysql_real_escape_string($query)."%' ";

$sql = "SELECT * FROM city $where $sort $limit";
$result = runSQL($sql);

$total = countRec("ID","city $where");

if(!isset($usingSQL)){
    include dirname(__FILE__).'/countryArray.inc.php';
    if($qtype && $query){
            $query = strtolower(trim($query));
            foreach($rows AS $key => $row){
                    if(strpos(strtolower($row[$qtype]),$query) === false){
                            unset($rows[$key]);
                    }
            }
    }
    //Make PHP handle the sorting
    $sortArray = array();
    foreach($rows AS $key => $row){
            $sortArray[$key] = $row[$sortname];
    }
    $sortMethod = SORT_ASC;
    if($sortorder == 'desc'){
            $sortMethod = SORT_DESC;
    }
    array_multisort($sortArray, $sortMethod, $rows);
    $total = count($rows);
    $rows = array_slice($rows,($page-1)*$rp,$rp);
}
header("Content-type: application/json");
$jsonData = array('page'=>$page,'total'=>$total,'rows'=>array());
foreach($rows AS $row){ **//THIS IS MY LINE 82**
    //If cell's elements have named keys, they must match column names
    //Only cell's with named keys and matching columns are order independent.
    $entry = array('id'=>$row['iso'],
            'cell'=>array(
                    'ID'=>$row['ID'],
                    'Name'=>$row['Name'],
                    'CountryCode'=>$row['CountryCode'],
                    'District'=>$row['District'],
                    'Population'=>$row['Population']

            ),
     );
     $jsonData['rows'][] = $entry;
 }
 echo json_encode($jsonData);

Thanks in advance .

Answer 1

Your $rows is never defined or initialised before the below snippet (most likely its first use). In such an event it is disproportionately unlikely that the foreach will forecast the variable to loop upon.

$query = strtolower(trim($query));
        foreach($rows AS $key => $row){
                if(strpos(strtolower($row[$qtype]),$query) === false){
                        unset($rows[$key]);
                }
        }