如何获取数组值并与cakePHP服务中的其他变量进行比较？

Question

I'm developing application there i want to generate invoice for various clients,while generating invoice i want to check whether that client has gstin number ,if that client does not have gstin number throw error .up to this i achieved but i want to check client type of that client.If that client type id exist in setting table, gstin should not verify,else verify gstin number for that client.

public function getGstinCType(){
        $result = $this->find('all', 
            array('conditions' => 
                array('Setting.row_status' => 0,'Setting.id' => 1),
                'fields'=>array('Setting.id','Setting.gstin_C_type'),
                                   )
            );

     $all_data = array();
    foreach ($result as $ind => $row) {
       $all_data[$row['Setting']['id']] = $row['Setting']['gstin_C_type'];
    }
  return $all_data;
 }

By above method i am getting array of client type id's like below

 out put:
     Array
    (
           [1] => ["38","40","25","4","51"]
    )

method in controller to get gstin and client type from client:

   public function getGstin($id) {
   $gstinCtype = $this->Cases->getClientgstByCaseId($id);
   $gstin=$gstinCtype['Client']['gstin'];
   $clienttypeId=$gstinCtype['Client']['client_type'];
   $ctypeID = $this->Setting->getGstinCType();
    if (in_array($ctypeID , $clienttypeId)) {
           $gstin = 1;
           echo $gstin; 
          } else {
            $gstin = (($gstin == 'null') && !empty($gstin)) ? 0 : 1;
            echo $gstin;
              exit;
              }
       }

i want to check with if client type( $clienttypeId) exist in setting table means result of method "getGstinCType()",default value for gstin should take and generate invoice .otherwise throw error to provide gstin number.

thanks in advance any help appriciated.