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ldap_search
Search LDAP tree
(PHP 4, PHP 5)
resource ldap_search ( resource link_identifier, string base_dn, string filter [, array attributes [, int attrsonly [, int sizelimit [, int timelimit [, int deref]]]]] )
Performs the search for a specified filter on the directory with the scope
of LDAP_SCOPE_SUBTREE. This is equivalent to searching
the entire directory.
From 4.0.5 on it's also possible to do parallel searches. To do this
you use an array of link identifiers, rather than a single identifier,
as the first argument. If you don't want the same base DN and the
same filter for all the searches, you can also use an array of base DNs
and/or an array of filters. Those arrays must be of the same size as
the link identifier array since the first entries of the arrays are
used for one search, the second entries are used for another, and so
on. When doing parallel searches an array of search result
identifiers is returned, except in case of error, then the entry
corresponding to the search will be FALSE. This is very much like
the value normally returned, except that a result identifier is always
returned when a search was made. There are some rare cases where the
normal search returns FALSE while the parallel search returns an
identifier.
Parameters
- link_identifier
An LDAP link identifier, returned by ldap_connect().
- base_dn
The base DN for the directory.
- filter
The search filter can be simple or advanced, using boolean operators in the format described in the LDAP documentation (see the » Netscape Directory SDK for full information on filters).
- attributes
An array of the required attributes, e.g. array("mail", "sn", "cn"). Note that the "dn" is always returned irrespective of which attributes types are requested.
Using this parameter is much more efficient than the default action (which is to return all attributes and their associated values). The use of this parameter should therefore be considered good practice.
- attrsonly
Should be set to 1 if only attribute types are wanted. If set to 0 both attributes types and attribute values are fetched which is the default behaviour.
- sizelimit
Enables you to limit the count of entries fetched. Setting this to 0 means no limit.
Note:This parameter can NOT override server-side preset sizelimit. You can set it lower though.
Some directory server hosts will be configured to return no more than a preset number of entries. If this occurs, the server will indicate that it has only returned a partial results set. This also occurs if you use this parameter to limit the count of fetched entries.
- timelimit
Sets the number of seconds how long is spend on the search. Setting this to 0 means no limit.
Note:This parameter can NOT override server-side preset timelimit. You can set it lower though.
- deref
Specifies how aliases should be handled during the search. It can be one of the following:
-
LDAP_DEREF_NEVER- (default) aliases are never dereferenced. -
LDAP_DEREF_SEARCHING- aliases should be dereferenced during the search but not when locating the base object of the search. -
LDAP_DEREF_FINDING- aliases should be dereferenced when locating the base object but not during the search. -
LDAP_DEREF_ALWAYS- aliases should be dereferenced always.
-
ChangeLog
| Version | Description |
|---|---|
| 4.0.5 | Parallel searches support was added. |
| 4.0.2 | The attrsonly, sizelimit, timelimit and deref were added. |
Examples
The example below retrieves the organizational unit, surname, given name and email address for all people in "My Company" where the surname or given name contains the substring $person. This example uses a boolean filter to tell the server to look for information in more than one attribute.
Example 1122. LDAP search
<?php
// $ds is a valid link identifier for a directory server
// $person is all or part of a person's name, eg "Jo"
$dn = "o=My Company, c=US";
$filter="(|(sn=$person*)(givenname=$person*))";
$justthese = array("ou", "sn", "givenname", "mail");
$sr=ldap_search($ds, $dn, $filter, $justthese);
$info = ldap_get_entries($ds, $sr);
echo $info["count"]." entries returned\n";
?>