Extends Dashboard customer for telephone number

Question

I'm trying to extend Magento\Customer\Block\Account\Dashboard\Info.php file. I created a module, where I have my custom block, Info.php. I want to display the telephone number of the customer after.

<?php

namespace Portail\Customer\Block\Account\Dashboard;

class Info extends Magento\Customer\Block\Account\Dashboard\Info
{
    public function testTxt(){
        return 'bonjour';
    }
}

I have added a di.xml in etc/

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Customer\Block\Account\Dashboard\Info" type="Portail\Customer\Block\Account\Dashboard\Info" />
</config>

But I have this error : Method invalid Magento\Customer\Block\Account\Dashboard\Info::testTxt

Answer 1

Solution : backslash and ran setup:upgrade

change from

class Info extends Magento\Customer\Block\Account\Dashboard\Info

to

class Info extends \Magento\Customer\Block\Account\Dashboard\Info