Hello. Since 5.6, "all encrypted client streams now enable peer verification by default". The problem I faced is with MySQL connection: we're connecting to old MySQL server with self-signed certificate, and are using simple SSL connection without certificates: mysql_connect("address", "user", "password", false, MYSQL_CLIENT_SSL); After upgrade from PHP 5.5 to 5.6, we are no longer able to connect to that server: PHP Warning: mysql_connect(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in a.php on line 25 PHP Warning: mysql_connect(): Cannot connect to MySQL by using SSL in a.php on line 25 PHP Warning: mysql_connect(): [2002] (trying to connect via tcp://address:3306) in a.php on line 25 PHP Warning: mysql_connect(): in a.php on line 25 According to docs, "it is possible to disable peer certificate verification for a request by setting the verify_peer context option to FALSE, and to disable peer name validation by setting the verify_peer_name context option to FALSE". But I can't find a way to use contexts even with MySQLi - is there one? Or maybe some workarounds? Thanks.