Example:

// ---------------------------------------------------------------------------------------------------------------
// Example 1 - no transmission parameter Criteria:

require (__DIR__ . '/service/WebServices100.php'); 
use services\WebServices100;

$url = 'http://<Your ip>:<Your Port>/WebServices100/<Your environment>/ArticleService/rest/GetCount';

// Send requests
$result = WebServices100::getData($url)));

$countContact = json_decode($result);

// ---------------------------------------------------------------------------------------------------------------
// EXAMPLE 2 - with the transmission parameter Criteria:

require (__DIR__ . '/service/Criteria.php');

use services\WebServices100;
use services\Criteria;

// add parameters
$response = new Criteria();
$response->setType('CriteriaLogical:http://www.proconsult.lu/WebServices100');
$response->setFieldName('Pays');
$response->setOperator("0");
$response->setValue("Belgique");
$response->setOperand(
    [
    'Operand1' => [
        '__type' => 'CriteriaComparison:http://www.proconsult.lu/WebServices100',
        'FieldName' => 'Pays',
        'Operator' => '0',
        'Value' => 'Belgique'],
    ]
); 
$data = $response->getResponse(); 
$url = 'http://<Your ip>:<Your Port>/WebServices100/<Your environment>/ArticleService/rest/GetCount';

// Send requests to receive data
$result = WebServices100::getData($url, $data)));

$response = json_decode($result);