Enabling tls negotiation in a socket

Hi, I have a question about opening a normal socket, then negotiating a TLS layer in PHP (through another protocol, which is XMPP in my case, in plain text at the beginning). I am currently using a socket created by "socket_create ()". But there seems not to be any way of switching to TLS negotiation with this, is there? Then I see the stream_socket_client () which can then switch to TLS with stream_socket_enable_crypto (). But this is only above PHP 5.1.0. Can anyone confirm me this is the right solution, and also only solution? (I mean "already made" one, I am not going to implement TLS myself! :p) How would you do such a thing otherwise? And is it possible to use stream_socket_enable_crypto () on the socket created by socket_create? Thanks all. Jehan