php - how to echo an associative array in a page? -


i starting learning codes , writing codes echo array , give me 2 errors:

warning: array_keys() expects parameter 1 array, null given in c:\xampp\htdocs\ogmt\rest_server_api.php on line 70

warning: invalid argument supplied foreach() in c:\xampp\htdocs\ogmt\rest_server_api.php on line 71..

how can solve this? code:

    if($result1){       // script business no, amount & merchant id,output merchant page       $query="select * customer_order order_time=(select max(order_time)from customer_order)";       $result=mysql_query($query);       while($row=mysql_fetch_assoc($result)){           $amount=$row['amount'];           $id=$row['merchant_id'];           $payment_mode=$row['mobile_service'];           switch($payment_mode){                           case 'tigo-pesa':             $result1=mysql_query("select * mobile_client mobile_service='tigo-pesa'");             while($row1=mysql_fetch_assoc($result1)){                   $data=array(                    'business no'=>$row1['business_no'],                    'payment mode'=>$payment_mode,                    'total amount tsh'=>$amount,                    'merchant id'=>$id                    );                    }break;              case 'm-pesa':             $result1=mysql_query("select * mobile_client mobile_service='m-pesa'");             while($row1=mysql_fetch_assoc($result1)){                   $data=array(                    'business no'=>$row1['business_no'],                    'payment mode'=>$payment_mode,                    'total amount tsh'=>$amount,                    'merchant id'=>$id                    );                    }break;             case 'airtel-money':             $result1=mysql_query("select * mobile_client mobile_service='airtel-money'");             while($row1=mysql_fetch_assoc($result1)){                   $data=array(                    'business no'=>$row1['business_no'],                    'payment mode'=>$payment_mode,                    'total amount tsh'=>$amount,                    'merchant id'=>$id                     );                    }break;             // default:            $data=array('error'=>"no payment mode selected");                 }            $response=array('details'=>$data);         }     }       else{           $response=array('details'=>"query failed!");           }        }  //print output merchant page complete payment  $keys = array_keys($data);   foreach($response['details'] $keys=>$value){        echo "$keys: $value</br>"; } ?>

you can not echo array, can try either var_dump($data); or print_r($data)

also can use implode("", $_post[$data]); ,that closer echo.


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