&reftitle.setup;
&reftitle.required; You will need to get and compile LDAP client libraries from either OpenLDAP or Bind9.net in order to compile PHP with LDAP support. For PHP 5.6 or newer you will need OpenLDAP 2.4 or newer.
&reference.ldap.configure; &reference.ldap.ini;
&reftitle.resources; Prior to PHP 8.1.0, most LDAP functions operate on or return resources (e.g. ldap_connect returns a positive LDAP link identifier required by most LDAP functions).