LDAP and PHP connection failure

Question

I am trying to connect to a secure LDAP server (using LDAPs) via PHP, but I am having problems with it. I get the following error

Warning: ldap_bind()

Answer 1

On UNIX "man ldap.conf" = ... SYNOPSIS /usr/local/etc/openldap/ldap.conf ...

Write TLS_REQCERT never in /usr/local/etc/openldap/ldap.conf and set ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3)

This work in my project on Nginx+PHP-fpm: nginx/1.6.0 php55-5.5.15 php55-ldap-5.5.15 openldap-client-2.4.39_1