(PHP 5 >= 5.1.0, PHP 7, PHP 8)
stream_socket_enable_crypto — Turns encryption on/off on an already connected socket
$stream,$enable,$crypto_method = null,$session_stream = nullEnable 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.
streamThe stream resource.
enableEnable/disable cryptography on the stream.
crypto_methodSetup encryption on the stream. Valid methods are
STREAM_CRYPTO_METHOD_SSLv2_CLIENTSTREAM_CRYPTO_METHOD_SSLv3_CLIENTSTREAM_CRYPTO_METHOD_SSLv23_CLIENTSTREAM_CRYPTO_METHOD_ANY_CLIENTSTREAM_CRYPTO_METHOD_TLS_CLIENTSTREAM_CRYPTO_METHOD_TLSv1_0_CLIENTSTREAM_CRYPTO_METHOD_TLSv1_1_CLIENTSTREAM_CRYPTO_METHOD_TLSv1_2_CLIENTSTREAM_CRYPTO_METHOD_TLSv1_3_CLIENT (as of PHP 7.4.0)STREAM_CRYPTO_METHOD_SSLv2_SERVERSTREAM_CRYPTO_METHOD_SSLv3_SERVERSTREAM_CRYPTO_METHOD_SSLv23_SERVERSTREAM_CRYPTO_METHOD_ANY_SERVERSTREAM_CRYPTO_METHOD_TLS_SERVERSTREAM_CRYPTO_METHOD_TLSv1_0_SERVERSTREAM_CRYPTO_METHOD_TLSv1_1_SERVERSTREAM_CRYPTO_METHOD_TLSv1_2_SERVERSTREAM_CRYPTO_METHOD_TLSv1_3_SERVER (as of PHP 7.4.0)
If omitted, the crypto_method context option on
the stream's SSL context will be used instead.
session_stream
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).
| Version | Description |
|---|---|
| 8.0.0 |
session_stream is now nullable.
|
Example #1 stream_socket_enable_crypto() example
<?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\r\n");
fwrite($fp, "PASS secret\r\n");
/* Turn off encryption for the rest */
stream_socket_enable_crypto($fp, false);
while ($motd = fgets($fp)) {
echo $motd;
}
fclose($fp);
?>The above example will output something similar to: