openssl_pkcs7_encrypt

Supported Versions: PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8

Encrypt an S/MIME message

        <?php openssl_pkcs7_encrypt(    string $input_filename,    string $output_filename,    OpenSSLCertificate|array|string $certificate,    ?array $headers,    int $flags = 0,    int $cipher_algo = OPENSSL_CIPHER_AES_128_CBC): bool
    