Php/docs/function.ldap-compare
ldap_compare
(PHP 4 >= 4.0.2, PHP 5, PHP 7)
ldap_compare — Compare value of attribute found in entry specified with DN
Description
ldap_compare
( resource $link_identifier
, string $dn
, string $attribute
, string $value
[, array $serverctrls = array()
] ) : mixed
Compare value of attribute
with value of same attribute in an LDAP directory entry.
Parameters
link_identifier- An LDAP link identifier, returned by ldap_connect().
dn- The distinguished name of an LDAP entity.
attribute- The attribute name.
value- The compared value.
serverctrls- Array of LDAP Controls to send with the request.
Return Values
Returns TRUE if value matches otherwise returns
FALSE. Returns -1 on error.
Changelog
| Version | Description |
|---|---|
| 7.3 | Support for serverctrls added
|
Examples
The following example demonstrates how to check whether or not given password matches the one defined in DN specified entry.
Example #1 Complete example of password check
<?php$ds=ldap_connect("localhost"); // assuming the LDAP server is on this hostif ($ds) { // bind if (ldap_bind($ds)) { // prepare data $dn = "cn=Matti Meikku, ou=My Unit, o=My Company, c=FI"; $value = "secretpassword"; $attr = "password"; // compare value $r=ldap_compare($ds, $dn, $attr, $value); if ($r === -1) { echo "Error: " . ldap_error($ds); } elseif ($r === true) { echo "Password correct."; } elseif ($r === false) { echo "Wrong guess! Password incorrect."; } } else { echo "Unable to bind to LDAP server."; } ldap_close($ds);} else { echo "Unable to connect to LDAP server.";}?>
Notes
Warning ldap_compare() can NOT be used to compare BINARY values!
