The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
LDAP_DEREF_NEVER 
    (integer)
   LDAP_DEREF_SEARCHING 
    (integer)
   LDAP_DEREF_FINDING 
    (integer)
   LDAP_DEREF_ALWAYS 
    (integer)
   LDAP_OPT_DEREF 
    (integer)
   LDAP_OPT_SIZELIMIT 
    (integer)
   Specifies the maximum number of entries that can be returned on a search operation.
Note: The actual size limit for operations is also bounded by the server's configured maximum number of return entries. The lesser of these two settings is the actual size limit.
LDAP_OPT_TIMELIMIT 
    (integer)
   Note: The actual time limit for operations is also bounded by the server's configured maximum time. The lesser of these two settings is the actual time limit.
LDAP_OPT_NETWORK_TIMEOUT
    (integer)
   LDAP_OPT_PROTOCOL_VERSION 
    (integer)
   LDAP_OPT_ERROR_NUMBER 
    (integer)
   LDAP_OPT_REFERRALS 
    (integer)
   LDAP_OPT_RESTART 
    (integer)
   LDAP_OPT_HOST_NAME 
    (integer)
   LDAP_OPT_ERROR_STRING 
    (integer)
   LDAP_OPT_MATCHED_DN 
    (integer)
   LDAP_OPT_SERVER_CONTROLS 
    (integer)
   LDAP_OPT_CLIENT_CONTROLS 
    (integer)
   LDAP_OPT_DEBUG_LEVEL 
    (integer)
   GSLC_SSL_NO_AUTH 
    (integer)
   GSLC_SSL_ONEWAY_AUTH 
    (integer)
   GSLC_SSL_TWOWAY_AUTH 
    (integer)