SOAP / PHP 5.6.7 (Zend Server 8) stream context TLS - Failed to load external entity.

php5.6_soap_example.php

<?php

// http://php.net/manual/en/migration56.openssl.php

if (version_compare(phpversion(), '5.6', '>='))
{
    $wsdl = 'https:// ...'
    
   $opts = array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false,
            'crypto_method' => STREAM_CRYPTO_METHOD_TLS_CLIENT // !!
        )
    );
    
    $parameters = [
        'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP,
        'ssl_method' => SOAP_SSL_METHOD_TLS,
        'stream_context' => stream_context_create($opts),
        'features' => SOAP_SINGLE_ELEMENT_ARRAYS,
        'classmap' => []
        'encoding' => 'UTF-8'
        'trace' => 1,
        'exceptions' => 1
    ];
    
    $soapClient = new SoapClient($wsdl, $parameters);
}