Array Chart

$render_sanitasi = array();
for ($i=$Tahun1;$i<=$Tahun2;$i++) {
    if ($Sumber <> 'all') {
        $query  = $this->db->query("SELECT * FROM sird_sanitasi WHERE sanitasi_tahun='$i' AND sanitasi_sumber='$Sumber'");
    } else {
        $query  = $this->db->query("SELECT * FROM sird_sanitasi WHERE sanitasi_tahun='$i'");
    }

    $row        = $query->row();
    if (isset($row)) {
        $komunal    = $row->sanitasi_komunal;
        $leherangsa = $row->sanitasi_leherangsa;
        $plengsengan= $row->sanitasi_plengsengan;
        $cemplung   = $row->sanitasi_cemplung;
    }

    $a = array();
    array_push($a, $komunal, $leherangsa, $plengsengan, $cemplung);
    $render_sanitasi[] = array(
        'label'             => $i.' - '.$Sumber,
        'data'              => $a,
        'backgroundColor'   => 'rgba(0, 188, 212, 0.8)'
    );
}

$render     = json_encode($render_sanitasi);
echo "<pre>";
print_r($render);
echo "</pre>";