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ldap_search

(PHP 4, PHP 5)

ldap_search — Search LDAP tree

Описание

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.

Параметри

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.

Забележка: 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.

Забележка: 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.

Връщани стойности

Returns a search result identifier or FALSE on error.

Дневник на промените

Версия	Описание
4.0.5	Parallel searches support was added.
4.0.2	The `attrsonly` , `sizelimit` , `timelimit` and `deref` were added.

Примери

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 #1 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";
?>

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