ldap_compare
(PHP 4 >= 4.0.2, PHP 5)
ldap_compare — Compare value of attribute found in entry specified with DN
Description
mixed ldap_compare
( resource $link_identifier
, string $dn
, string $attribute
, string $value
)
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.
Return Values
Returns TRUE if value matches otherwise returns FALSE. Returns -1 on error.
Παραδείγματα
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
$ds=ldap_connect("localhost"); // assuming the LDAP server is on this host
if ($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!