certId读取问题

[q707180869]

          if (is_file($cert)) {
            $certs = file_get_contents($cert);
        }
       //需要加上这两行才行
       openssl_pkcs12_read($certData, $certs, $pass)
       $cert = $certs['cert'];

        
        $certData = openssl_x509_parse($cert);

        return $certData['serialNumber'];