PHP Manual: ldap_set

Description

function ldap_set_option(?LDAP\Connection $ldap, int $option, array|string|int|bool $value): bool

Sets the value of the specified option to be value.

Note:
TLS-related options (LDAP_OPT_X_TLS_*) must be set globally by passing null as ldap, because the TLS context is initialized before the per-connection state is available. These options must also be set before calling ldap_bind().

Parameters

ldap

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

option

The parameter option can be one of:

Option	Type	Available 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_REFERRALS`	bool
`LDAP_OPT_RESTART`	bool
`LDAP_OPT_HOST_NAME`	string
`LDAP_OPT_ERROR_STRING`	string
`LDAP_OPT_DIAGNOSTIC_MESSAGE`	string
`LDAP_OPT_MATCHED_DN`	string
`LDAP_OPT_SERVER_CONTROLS`	array
`LDAP_OPT_CLIENT_CONTROLS`	array
`LDAP_OPT_X_KEEPALIVE_IDLE`	int	PHP 7.1.0
`LDAP_OPT_X_KEEPALIVE_PROBES`	int	PHP 7.1.0
`LDAP_OPT_X_KEEPALIVE_INTERVAL`	int	PHP 7.1.0
`LDAP_OPT_X_TLS_CACERTDIR`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_CACERTFILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_CERTFILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_CIPHER_SUITE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_CRLCHECK`	int	PHP 7.1.0
`LDAP_OPT_X_TLS_CRLFILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_DHFILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_KEYFILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_PROTOCOL_MIN`	int	PHP 7.1.0
`LDAP_OPT_X_TLS_PROTOCOL_MAX`	int	PHP 8.4.0
`LDAP_OPT_X_TLS_RANDOM_FILE`	string	PHP 7.1.0
`LDAP_OPT_X_TLS_REQUIRE_CERT`	int	PHP 7.0.5

LDAP_OPT_SERVER_CONTROLS and LDAP_OPT_CLIENT_CONTROLS require a list of controls, this means that the value must be an array of controls. A control consists of an oid identifying the control, an optional value, and an optional flag for criticality. In PHP a control is given by an array containing an element with the key oid and string value, and two optional elements. The optional elements are key value with string value and key iscritical with boolean value. iscritical defaults to false if not supplied. See » draft-ietf-ldapext-ldap-c-api-xx.txt for details. See also the second example below.

Note:
All TLS options must be set globally before ldap_connect() for ldaps connection or for the connection before ldap_start_tls().

value

The new value for the specified option.

Return Values

Returns true on success or false on failure.

Changelog

Version	Description
8.5.0	A ValueError is now thrown when passing an invalid `option`.
8.1.0	The `ldap` parameter expects an LDAP\Connection instance now; previously, a valid `ldap link` resource was expected.

Examples

Example #1 Set protocol version

<?php
// $ds is a valid LDAP\Connection instance for a directory server
if (ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3)) {
    echo "Using LDAPv3";
} else {
    echo "Failed to set protocol version to 3";
}
?>

Example #2 Set server controls

<?php
// $ds is a valid LDAP\Connection instance for a directory server
// control with no value
$ctrl1 = array("oid" => "1.2.752.58.10.1", "iscritical" => true);
// iscritical defaults to FALSE
$ctrl2 = array("oid" => "1.2.752.58.1.10", "value" => "magic");
// try to set both controls
if (!ldap_set_option($ds, LDAP_OPT_SERVER_CONTROLS, array($ctrl1, $ctrl2))) {
    echo "Failed to set server controls";
}
?>

Example #3 Debugging a connection issue

<?php
// A NULL connection sets the option for the whole process (OpenLDAP only).
// Set before ldap_connect(), it also traces the initialization; set later,
// only the operations that follow are traced.
// 7 combines the OpenLDAP levels 1 (trace), 2 (packets) and 4 (arguments).
// The traces are written to stderr, not to the output of the script.
ldap_set_option(null, LDAP_OPT_DEBUG_LEVEL, 7);

$ds = ldap_connect("ldaps://ldap.example.com:636");
ldap_bind($ds);
?>

Notes

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