尝试登录时出现以下错误：

错误：由于意外输出，Cookie被阻止

我定制了wordpress的核心功能wp_hash_password() 和wp_check_password() 使用SHA1算法进行用户身份验证，而不是MD5。我在插件中修改了它们。php文件（不是最佳实践，但适合测试）。函数现在如下所示：

function wp_hash_password( $password ) {
            global $wp_hasher;

            if ( empty( $wp_hasher ) ) {
                    $wp_hasher = sha1( $password );
            }

            return $wp_hasher->HashPassword( trim( $password ) );;
    }

function wp_check_password( $password, $hash, $user_id = \'\' ) {
            global $wp_hasher;
            // If the hash is still md5...
            if ( strlen( $hash ) == 40 ) {
                    echo \'<h2>\'.$hash.\'</h2>\';
                    $check = hash_equals( $hash, sha1( $password ) );
                    if ( $check && $user_id ) {
                            // Rehash using new hash.
                            wp_set_password( $password, $user_id );
                            $hash = wp_hash_password( $password );
                    }

                    /**
                     * Filters whether the plaintext password matches the encrypted password.
                     *
                     * @since 2.5.0
                     *
                     * @param bool       $check    Whether the passwords match.
                     * @param string     $password The plaintext password.
                     * @param string     $hash     The hashed password.
                     * @param string|int $user_id  User ID. Can be empty.
                     */
                    return apply_filters( \'check_password\', $check, $password, $hash, $user_id );
            }

            // If the stored hash is longer than an MD5,
            // presume the new style phpass portable hash.
            if ( empty( $wp_hasher ) ) {
                    require_once ABSPATH . WPINC . \'/class-phpass.php\';
                    // By default, use the portable hash from phpass.
                    $wp_hasher = new PasswordHash( 8, true );
            }

            $check = $wp_hasher->CheckPassword( $password, $hash );

            /** This filter is documented in wp-includes/pluggable.php */
            return apply_filters( \'check_password\', $check, $password, $hash, $user_id );
    }

从密码到SHA1的转换与密码检查一样完美。我认为负责设置cookie的函数仍在使用MD5。但我无法验证，也找不到函数
有人对此有想法吗

提前感谢

echo \'<h2>\'.$hash.\'</h2>\';