Allow self-signed certificates for HTTPS wrapper

Basically i have this:

function request($url) {    return file_get_contents($url, false, stream_context_create(array("ssl" => array("verify_peer" => true,"allow_self_signed" => false,        )    )));}request("https://[A]");request("https://[B]");

Where [A] is some URL on a server with a "real" certificate and [B] is something on one with only a self-signed certificate.

With [A] it works fine, with [B] i get this:

file_get_contents(): Failed to enable crypto

Which is a rather unfortunate error message that should have been something like "server certificate verification failed", but fine...

Now i thought: "ok, [B] is my test system - i don't care for the certificate" and changed the context into this:

"verify_peer" => false,"allow_self_signed" => true,

It should now accept any server certificate, even my self signed one. But it's still the same behavior - [A] works, [B] doesn't. Why?

Btw: I know that it works well with the curl extension, but i want to beat this without it.