Can not connect to SMTP host in PHP 5.6

Hi,

I have installed WHMCS v631. The problem is that I moved from PHP 5.4 to the correct version 5.6.29 which requires WHMCS. If the installed version of PHP 5.4 and SMTP port 465 worked. Now I use PHP version 5.6 29 and that he can not send emails. I have proven that only works PHP 5.4 SMTP port 465. OTHER PHP are unable to send through SMTP port 465. Otherwise, the firewall has nothing to do with that. The problem is smtp authentication certificate ?? Which previous PHP 5.4 does not require this, and everything worked. Can you advise me how to completely fix 5.6. 29 to work as SMTP SSL with port 465?