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
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.
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
$ds=ldap_connect("localhost"); // assuming the LDAP server is on this host
if ($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
ldap_compare() can NOT be used to compare BINARY values!
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.ldap-compare.php
