BeSimpleSoap/src/BeSimple/SoapClient/Tests/ServerInterop/MTOMServer.php

<?php

require '../../../../../vendor/autoload.php';

use BeSimple\SoapCommon\Helper as BeSimpleSoapHelper;
use BeSimple\SoapServer\SoapServer as BeSimpleSoapServer;

use BeSimple\SoapClient\Tests\ServerInterop\Fixtures;

$options = array(
    'soap_version'    => SOAP_1_1,
    'features'        => SOAP_SINGLE_ELEMENT_ARRAYS, // make sure that result is array for size=1
    'attachment_type' => BeSimpleSoapHelper::ATTACHMENTS_TYPE_MTOM,
    'cache_wsdl'      => WSDL_CACHE_NONE,
    'classmap'        => array(
        'base64Binary'      => 'BeSimple\SoapClient\Tests\ServerInterop\Fixtures\base64Binary',
        'AttachmentType' => 'BeSimple\SoapClient\Tests\ServerInterop\Fixtures\AttachmentRequest',
    ),
);

class Mtom
{
    public function attachment(Fixtures\AttachmentRequest $attachment)
    {
        $b64 = $attachment->binaryData;

        file_put_contents(__DIR__.'/'.$attachment->fileName, $b64->_);

        return 'File saved succesfully.';
    }
}

$ss = new BeSimpleSoapServer(__DIR__.'/Fixtures/MTOM.wsdl', $options);
$ss->setClass('Mtom');
$ss->handle();