(PHP 5 >= 5.1.0)
stream_socket_enable_crypto — Turns encryption on/off on an already connected socket
Enable or disable encryption on the stream.
Once the crypto settings are established, cryptography can be turned on and off dynamically by passing TRUE or FALSE in the enable parameter.
The stream resource.
Enable/disable cryptography on the stream.
Setup encryption on the stream. Valid methods are
Seed the stream with settings from session_stream.
Returns TRUE on success, FALSE if negotiation has failed or 0 if there isn't enough data and you should try again (only for non-blocking sockets).
Example #1 stream_socket_enable_crypto() example 以上例程的输出类似于：
<?php
$fp = stream_socket_client("tcp://myproto.example.com:31337", $errno, $errstr, 30);
if (!$fp) {
die("Unable to connect: $errstr ($errno)");
}
/* Turn on encryption for login phase */
stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_SSLv23_CLIENT);
fwrite($fp, "USER god
");
fwrite($fp, "PASS secret
");
/* Turn off encryption for the rest */
stream_socket_enable_crypto($fp, false);
while ($motd = fgets($fp)) {
echo $motd;
}
fclose($fp);
?>