命令如下
php -r 'print_r(stream_get_transports());'输出结果
Array
(
[0] => tcp
[1] => udp
[2] => unix
[3] => udg
[4] => ssl
[5] => sslv3
[6] => tls
[7] => tlsv1.0
[8] => tlsv1.1
[9] => tlsv1.2
)可以看到支持SSL，SSLV3 TLSV等协议
