HTTP_Request2でhttp通信はできたけど、 接続先をhttpsにしただけでエラーが出た場合の対処方法のメモ。 Unable to connect to ssl://example.com:443. Error: stream_socket_client(): unable to connect to ssl://example.com:443 (Unknown error) stream_socket_client(): Failed to enable crypto stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify