Get the current value for given option

# ldap_get_option

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

ldap_get_option — Get the current value for given option

### Description

ldap_get_option(?LDAP\Connection `$ldap`, int `$option`, array|string|int `&$value` = `null`): bool

Sets `value` to the value of the specified option.

### Parameters

`ldap`

  Either an LDAP\Connection instance, returned by ldap_connect(), to get the option for that connection, or `null` to get the global option.

`option`

  The parameter `option` can be one of:

  Option | Type | since
  --- | --- | ---
  `LDAP_OPT_DEREF` | int |
  `LDAP_OPT_SIZELIMIT` | int |
  `LDAP_OPT_TIMELIMIT` | int |
  `LDAP_OPT_NETWORK_TIMEOUT` | int |
  `LDAP_OPT_PROTOCOL_VERSION` | int |
  `LDAP_OPT_ERROR_NUMBER` | int |
  `LDAP_OPT_DIAGNOSTIC_MESSAGE` | string |
  `LDAP_OPT_REFERRALS` | int |
  `LDAP_OPT_RESTART` | int |
  `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 | 7.1
  `LDAP_OPT_X_KEEPALIVE_PROBES` | int | 7.1
  `LDAP_OPT_X_KEEPALIVE_INTERVAL` | int | 7.1
  `LDAP_OPT_X_TLS_CACERTDIR` | string | 7.1
  `LDAP_OPT_X_TLS_CACERTFILE` | string | 7.1
  `LDAP_OPT_X_TLS_CERTFILE` | string | 7.1
  `LDAP_OPT_X_TLS_CIPHER_SUITE` | string | 7.1
  `LDAP_OPT_X_TLS_CRLCHECK` | int | 7.1
  `LDAP_OPT_X_TLS_CRL_NONE` | int | 7.1
  `LDAP_OPT_X_TLS_CRL_PEER` | int | 7.1
  `LDAP_OPT_X_TLS_CRL_ALL` | int | 7.1
  `LDAP_OPT_X_TLS_CRLFILE` | string | 7.1
  `LDAP_OPT_X_TLS_DHFILE` | string | 7.1
  `LDAP_OPT_X_TLS_KEYFILE` | string | 7.1
  `LDAP_OPT_X_TLS_PACKAGE` | string | 7.1
  `LDAP_OPT_X_TLS_PROTOCOL_MIN` | int | 7.1
  `LDAP_OPT_X_TLS_RANDOM_FILE` | string | 7.1
  `LDAP_OPT_X_TLS_REQUIRE_CERT` | int |

`value`

  This will be set to the option value.

### Return Values

Returns `true` on success or `false` on failure.

### Changelog

Version | Description
--- | ---
8.5.0 | `ldap` is now nullable.
8.1.0 | The `ldap` parameter expects an LDAP\Connection instance now; previously, a valid `ldap link` resource was expected.

### Examples

Example #1 Check protocol version

`<?php
// $ds is a valid LDAP\Connection instance for a directory server
if (ldap_get_option($ds, LDAP_OPT_PROTOCOL_VERSION, $version)) {
echo "Using protocol version $version\n";
} else {
echo "Unable to determine protocol version\n";
}
?>`

### Notes

> Note:

> This function is only available when using OpenLDAP 2.x.x OR Netscape Directory SDK x.x.

### See Also

- ldap_set_option() - Set the value of the given option

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