LDAP_COMPARE(3) 1 LDAP_COMPARE(3)
ldap_compare - Compare value of attribute found in entry specified with DN
SYNOPSIS
mixed ldap_compare (resource $link_identifier, string $dn, string $attribute, string $value)
DESCRIPTION
Compare $value of $attribute with value of same attribute in an LDAP directory entry.
PARAMETERS
o $link_identifier
- An LDAP link identifier, returned by ldap_connect(3).
o $dn
- The distinguished name of an LDAP entity.
o $attribute
- The attribute name.
o $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
Warning
ldap_compare(3) can NOT be used to compare BINARY values!
PHP Documentation Group LDAP_COMPARE(3)
