SOAP in PHP

soap.php

<?php
/**
* http://php.net/manual/en/soapclient.soapclient.php
*
**/


$options = array();

// general option
$options['encoding'] = 'UTF-8';
$options['soap_version'] = SOAP_1_1;
$options['cache_wsdl'] = WSDL_CACHE_NONE;
$options['compression'] = SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP;

// for debugging
$options['trace'] = true;
$options['exceptions'] = true;

// basic authentication
$options['login'] = '{{ domain\username }}';
$options['password'] = '{{ password }}';

// SSL certificate configuration, http://php.net/manual/en/context.ssl.php
$options['stream_context'] = stream_context_create([
    'ssl' => [
        'verify_peer'=> true,
        'verify_peer_name' => false,
        'allow_self_signed' => true,
        'local_cert' => '{{ public key pem path }}',
        'local_pk' => '{{ private key pem path }}',
        'passphrase' => '{{ cert password }}'
    ]
]);

//create the client
$client = new SoapClient('{{ path to WSDL }}', $options);