php streamsocketenablecrypto,PHP stream_socket_enable_crypto 用法 手册 | 示例代码

Constants added in PHP 5.6 :

STREAM_CRYPTO_METHOD_ANY_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT

STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT

STREAM_CRYPTO_METHOD_ANY_SERVER

STREAM_CRYPTO_METHOD_TLSv1_0_SERVER

STREAM_CRYPTO_METHOD_TLSv1_1_SERVER

STREAM_CRYPTO_METHOD_TLSv1_2_SERVER

Now, be careful because since PHP 5.6.7, STREAM_CRYPTO_METHOD_TLS_CLIENT (same for _SERVER) no longer means any tls version but tls 1.0 only (for "backward compatibility"...).

Before PHP 5.6.7 :

STREAM_CRYPTO_METHOD_SSLv23_CLIENT = STREAM_CRYPTO_METHOD_SSLv2_CLIENT STREAM_CRYPTO_METHOD_SSLv3_CLIENT

STREAM_CRYPTO_METHOD_TLS_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT

PHP >= 5.6.7

STREAM_CRYPTO_METHOD_SSLv23_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT

STREAM_CRYPTO_METHOD_TLS_CLIENT = STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT

STREAM_CRYPTO_METHOD_SSLv23_CLIENT is not safe to use because before php 5.6.7, it means sslv2 or sslv3. So, you should do this :

$crypto_method=STREAM_CRYPTO_METHOD_TLS_CLIENT;

if (