Add this code in PHP file
$this->load->model('account/customer');
$data['customer_firstname']=$this->customer->getFirstName();
$data['customer_lastname'] = $this->customer->getLastName();
$data['customer_email']=$this->customer->getEmail();
$data['customer_telephone']=$this->customer->getTelephone();Add this code in TWIG file
<div class="col-md-12">
{{ customer_firstname }} {{ customer_lastname }}
{{ customer_email }}
{{ customer_telephone }}
</div>
