Get supported features in JSON format

# rnp_supported_features

(PECL rnp >= 0.1.1)

rnp_supported_features — Get supported features in JSON format

### 説明

function rnp_supported_features(string `$type`): string|false

Get the JSON formatted string containing array of supported rnp feature values (algorithms, curves, etc) by type.

### パラメータ

`type`
  See RNP_FEATURE_* constants for supported values.

### 戻り値

String containing JSON formatted array of supported algorithms, curves, etc失敗した場合に `false` を返します.

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