Compare value of attribute found in entry specified with DN

说明

ldap_compare ( resource $ldap , string $dn , string $attribute , string $value , array|null $controls = null ) : bool|int

Compare value of attribute with value of same attribute in an LDAP directory entry.

参数

ldap: An LDAP link identifier, returned by ldap_connect().
dn: The distinguished name of an LDAP entity.
attribute: The attribute name.
value: The compared value.
controls: Array of LDAP Controls to send with the request.

返回值

Returns true if value matches otherwise returns false. Returns -1 on error.

更新日志

版本	说明
8.0.0	`controls` is nullable now; previously, it defaulted to `[]`.
7.3	Support for `controls` added

范例

The following example demonstrates how to check whether or not given password matches the one defined in DN specified entry.

示例 #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.";
}
?>

注释

警告

ldap_compare() can NOT be used to compare BINARY values!