Uncaught SoapFault exception: [SOAP-ENV:Server] Function 'X' doesn't exist - php

Question

I'm trying to setup a web service without wsdl (for the moment) but is not working.
I have a file called "Operaciones.php" with the following code:
<?php
namespace ClasesT6;
use PDO, PDOException;
class Operaciones extends Conexion {
public function __construct()
{
parent::__construct();
}
function getPVP($id) {
$pvp = null;
$consulta = " SELECT pvp FROM productos WHERE id='$id' ";
$stmt = $this->conexion->prepare($consulta);
try {
$stmt->execute();
if($stmt) {
$row = $stmt->fetch();
$pvp = $row['pvp'];
}
} catch (PDOException $ex) {
die("Error al recuperar el pvp del producto indicado: " . $ex->getMessage());
}
return $pvp;
}
function getStock($idproducto, $idtienda) {
$stock = null;
$consulta = " SELECT unidades FROM stocks WHERE producto='$idproducto' AND tienda='$idtienda' ";
$stmt = $this->conexion->prepare($consulta);
try {
$stmt->execute();
if($stmt) {
$row = $stmt->fetch();
$stock = $row['unidades'];
}
} catch (PDOException $ex) {
die("Error al recuperar el stock del producto indicado en la tienda indicada: " . $ex->getMessage());
}
return $stock;
}
function getFamilias() {
$familiasCod = array();
$consulta = " SELECT * FROM familias ";
$stmt = $this->conexion->prepare($consulta);
try {
$stmt->execute();
if($stmt) {
$row = $stmt->fetch();
while ($row != null) {
$familiasCod[] = "{$row['cod']}";
$row = $stmt->fetch();
}
}
} catch (PDOException $ex) {
die("Error al recuperar el código de las familias: " . $ex->getMessage());
}
return $familiasCod;
}
function getProductosFamilia($cod) {
$productosFamiliaIds = array();
$consulta = " SELECT id FROM productos WHERE familia='".$cod."' ";
$stmt = $this->conexion->prepare($consulta);
try {
$stmt->execute();
if($stmt) {
$row = $stmt->fetch();
while ($row != null) {
$productosFamiliaIds[] = "{$row['id']}";
$row = $stmt->fetch();
}
}
} catch (PDOException $ex) {
die("Error al recuperar el id de los productos de la familia indicada: " . $ex->getMessage());
}
return $productosFamiliaIds;
}
}
?>
Then I have the file "service.php" with the following code:
<?php
require '../vendor/autoload.php';
$uri = 'http://localhost/archivos/FP/DWES/tarea6/servidorSoap';
$parametros = ['uri'=>$uri];
try {
$server = new SoapServer(NULL, $parametros);
$server->setClass('Operaciones');
$server->handle();
} catch (SoapFault $f) {
die("error en server: " . $f->getMessage());
}
?>
And then I have the file "cliente.php" with the following code:
<?php
require '../vendor/autoload.php';
$url = 'http://localhost/archivos/FP/DWES/tarea6/servidorSoap/servicio.php';
$uri = 'http://localhost/archivos/FP/DWES/tarea6/servidorSoap';
header('Content-Type: text/html; charset=UTF-8');
try {
$cliente = new SoapClient(null, ['location' => $url, 'uri' => $uri, 'trace'=>true]);
} catch (SoapFault $ex) {
echo "Error: ".$ex->getMessage();
}
$paramPVP = ['id' => "1"];
$getPVP = $cliente->__soapCall('getPVP', $paramPVP);
?>
When I open client.php on my localhost I get this error:
Fatal error: Uncaught SoapFault exception: [SOAP-ENV:Server] Function 'getPVP' doesn't exist in /Applications/XAMPP/xamppfiles/htdocs/files/FP/DWES/task6/public/client.php:17 Stack trace: #0 /Applications/XAMPP/xamppfiles/htdocs/archivos/FP/DWES/tarea6/public/cliente.php(17): SoapClient->__soapCall('getPVP', Array) #1 {main} thrown in /Applications/XAMPP /xamppfiles/htdocs/archivos/FP/DWES/tarea6/public/cliente.php on line 17
I've followed the instructions of the notes from my course to make service.php and cliente.php but it is not working and I don't know how to fix it.
Many thanks in advance for your solution suggestions