Thank you for bringing this to our attention. We are aware that since PHP in Solaris currently uses the Solaris LDAP Library, rather than OpenLDAP as in other operating systems, LDAPS is not supported. We are currently looking at changing this in the way you are requesting. Any change would be made available in a future Update and/or SRU to Solaris.
let me please add another aspect: There is at least one further feature which is supported by OpenLDAP lib but doesn't seem to be available in the Solaris LDAP lib: "Paged Results". Some PHP-based web applications do have their problems with detecting the LDAP libs capabilities through PHP, for example the learning management tool Moodle is not able to detect correctly that PHP which comes with Solaris 11.2 is not capable of handling "paged results". As a result, one gets a very strange behavior of the web application. I debugged at least half a day until I noticed that the misbehavior of Moodle's LDAP subsystem stems from the fact that it assumed that "pages results" were available. Although I already had built packages containing a 64 bit version of PHP 5.4.x, it was still linked to the Solaris LDAP lib. After changing that to openLDAP lib, the problem was gone.
I think that fixing issues like that might reduce the trouble users have when running popular web applications under Solaris. The step to a 64 bit version of PHP 5.6 in Solaris 11.3 is absolutely great and it would be even greater to have a PHP version which is linked to OpenLDAP lib (or enabling equal features in the Solaris LDAP lib).