当然，使用 openssl_pkey_new:

Sure, use openssl_pkey_new:

$privateKey = openssl_pkey_new(array('private_key_bits' => 2048));
$details = openssl_pkey_get_details($privateKey);
$publicKey = $details['key'];

您可以使用 openssl_pkey_export 导出密钥或openssl_pkey_export_to_file.

You can export the keys with openssl_pkey_export or openssl_pkey_export_to_file.