call a function in different namespacs php - php

Question

I learn MVC recently. I try to rebulid my website in MVC structure, and i have a problem to call function inside different name sapace(maybe i don't know about OOP very much). Here is my code:
namespace UserFrosting;
class GroupController extends \UserFrosting\BaseController {
public function testFunction($params){
//Simple test function that i had error: Call to undefined function UserFrosting\testFunction()
$params['Password'] = $pw;
$params['JSON'] = 'Yes';
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($curl, CURLOPT_TIMEOUT, 30);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_VERBOSE, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($curl);
if (curl_errno($curl)) $obj = (object) array('Result' => 'Error', 'Error' => curl_error($curl));
else if (empty($response)) $obj = (object) array('Result' => 'Error', 'Error' => 'Connection failed');
else $obj = json_decode($response);
curl_close($curl);
return $obj;
}
public function loginNumber(){
$params = array("Command" => "SystemStats");
$api = testFunction($params);
echo "<h3>Server Status</h3>\r\n";
if ($api -> Result == "Error") die("Error: " . $api -> Error);
echo "Logins: " . $api -> Logins . "<br/>\r\n";
}
}
So basically i called loginNumber(), then it shows this error:*
Call to undefined function UserFrosting\testFunction()*
I had same problem with SoupClient but i shows this error:*
Class 'UserFrosting\SoapClient' not found*
here is my soapClient code in same namesapce:
public function templatePost(){
$client = SoapClient('https://www.test.com/pg/services/WebGate/wsdl', ['encoding' => 'UTF-8']);
$result = $client->PaymentRequest([
'MerchantID' => $MerchantID,
'Amount' => $Amount,
'Description' => $Description,
'Email' => $Email,
'Mobile' => $Mobile,
'CallbackURL' => $CallbackURL,
]);
if ($result->Status == 100) {
header('Location: https://www.test.com/pg/StartPay/'.$result->Authority);
} else {
echo'ERR: '.$result->Status;
}
}
I had the same error, what is my problem? how can i call these functions?

Answer 1

Explanation: You do not have a function testFunction, but the object GroupController has a method testFuntion. So you need to use $this->.. since you are already inside that class. Your loginNumber should read:
public function loginNumber(){
$params = array("Command" => "SystemStats");
$api = $this->testFunction($params);
echo "<h3>Server Status</h3>\r\n";
if ($api -> Result == "Error") die("Error: " . $api -> Error);
echo "Logins: " . $api -> Logins . "<br/>\r\n";
}
In your second question you are not importing the class SoapClient correctly. Please try:
$client = \SoapClient(...);
This uses SoapClient from root namespace.