Discard all exists response body

# Yaf_Response_Abstract::clearBody

(Yaf >=1.0.0)

Yaf_Response_Abstract::clearBody — Discard all exists response body

### Description

public Yaf_Response_Abstract::clearBody(string `$key` = ?): bool

Clear existsed content

### Parameters

`key`

  the content key, if you don't specific, then all contents will be cleared.

  > Note:

  > this parameter is introduced as of 2.2.0

### Return Values

### See Also

- Yaf_Response_Abstract::setBody() - Set content to response
- Yaf_Response_Abstract::appendBody() - Append to response body
- Yaf_Response_Abstract::prependBody() - The prependBody purpose
- Yaf_Response_Abstract::getBody() - Retrieve a exists content

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