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SSL server

InitPHP\Socket\Server\SSL is the ssl:// scheme counterpart of TLS. The class is functionally identical — the only difference is the URL scheme passed to stream_socket_server, which affects the default ciphers PHP selects.

use InitPHP\Socket\Socket;
use InitPHP\Socket\Enum\Transport;

$server = Socket::server(Transport::SSL, '127.0.0.1', 8443, timeout: 5.0)
    ->option('local_cert', __DIR__ . '/server.pem');

$server->listen();

Refer to the TLS server guide for the full option list, handshake notes and certificate setup; everything translates directly.

When to pick SSL vs TLS

Prefer Transport::TLS unless you specifically need the legacy SSLv23 / SSLv2 / SSLv3 fallback selection. Modern peers negotiate TLS 1.2 / 1.3 either way; the ssl:// scheme exists for compatibility with old PHP code and rarely gives you anything new.

If you need a specific protocol version, set it explicitly with crypto():

use InitPHP\Socket\Enum\CryptoMethod;

$server->crypto(CryptoMethod::TLSv1_2);