(PHP 4 >= 4.0.4, PHP 5, PHP 7)
ldap_get_option — Get the current value for given option
   Sets retval to the value of the specified option.
  
link_identifierAn LDAP link identifier, returned by ldap_connect().
option
       The parameter option can be one of:
       
| Option | Type | |
|---|---|---|
| LDAP_OPT_DEREF | integer | |
| LDAP_OPT_SIZELIMIT | integer | |
| LDAP_OPT_TIMELIMIT | integer | |
| LDAP_OPT_NETWORK_TIMEOUT | integer | |
| LDAP_OPT_PROTOCOL_VERSION | integer | |
| LDAP_OPT_ERROR_NUMBER | integer | |
| LDAP_OPT_REFERRALS | bool | |
| LDAP_OPT_RESTART | bool | |
| LDAP_OPT_HOST_NAME | string | |
| LDAP_OPT_ERROR_STRING | string | |
| LDAP_OPT_MATCHED_DN | string | |
| LDAP_OPT_SERVER_CONTROLS | array | |
| LDAP_OPT_CLIENT_CONTROLS | array | |
| LDAP_OPT_X_KEEPALIVE_IDLE | int | |
| LDAP_OPT_X_KEEPALIVE_PROBES | int | |
| LDAP_OPT_X_KEEPALIVE_INTERVAL | int | |
| LDAP_OPT_X_TLS_CACERTDIR | string | |
| LDAP_OPT_X_TLS_CACERTFILE | string | |
| LDAP_OPT_X_TLS_CERTFILE | string | |
| LDAP_OPT_X_TLS_CIPHER_SUITE | string | |
| LDAP_OPT_X_TLS_CRLCHECK | integer | |
| LDAP_OPT_X_TLS_CRLFILE | string | |
| LDAP_OPT_X_TLS_DHFILE | string | |
| LDAP_OPT_X_TLS_KEYILE | string | |
| LDAP_OPT_X_TLS_PACKAGE | string | |
| LDAP_OPT_X_TLS_PROTOCOL_MIN | integer | |
| LDAP_OPT_X_TLS_RANDOM_FILE | string | |
| LDAP_OPT_X_TLS_REQUIRE_CERT | integer | 
retvalThis will be set to the option value.
   Returns TRUE on success or FALSE on failure.
  
Example #1 Check protocol version
<?php
// $ds is a valid link identifier for a directory server
if (ldap_get_option($ds, LDAP_OPT_PROTOCOL_VERSION, $version)) {
    echo "Using protocol version $version\n";
} else {
    echo "Unable to determine protocol version\n";
}
?>
Note:
This function is only available when using OpenLDAP 2.x.x OR Netscape Directory SDK x.x.