How to get customer details in Magento 2 using SOAP API

customer-details-soap-m2.php

<?php
$baseUrl = '<YOUR_DOMAIN>/';
$request = new SoapClient(
    "{$baseUrl}soap/?wsdl&services=integrationAdminTokenServiceV1",
    ['soap_version' => SOAP_1_2]
);

// Get authorization token
$token = $request->integrationAdminTokenServiceV1CreateAdminAccessToken([
    'username' => '<YOUR_ADMIN_USER>',
    'password' => '<YOUR_PASSWORD>'
]);

// Create authorization header
$opts = [
    'http' => [
        'header' => 'Authorization: Bearer ' . $token->result
    ]
];
$context = stream_context_create($opts);

// Init SOAP client
$soapClient = new SoapClient(
    "{$baseUrl}soap/default?wsdl&services=customerCustomerRepositoryV1",
    ['version' => SOAP_1_2, 'stream_context' => $context]
);

$result = $soapClient->customerCustomerRepositoryV1GetById(['customerId' => 126]);

var_dump($result);