How to sign a SOAP message using a private key in PHP?

Question

PHP

Good afternoon. I write in php/yii2
To communicate with one web service, you need to sign a SOAP message with a private key.

Next step: Digitally sign (detached type XML Digital Signature) the whole SOAP
message with the Private Key of Sender Certificate and put the signature
into SOAP-header

As I understand it, a regular SoapClient cannot do this. But will the omniscient all tell you what to use now for signing SOAP.