openssl_pkcs7_encrypt

Supported Versions: PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8
Encrypt an S/MIME message
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