| Fully Qualified Name: | Zend\Mail\Header\HeaderValue | 
| Name | Description | Defined By | 
|---|---|---|
| assertValid() | Assert that the header value is valid. | HeaderValue | 
| filter() | Filter the header value according to RFC 2822 | HeaderValue | 
| isValid() | Determine if the header value contains any invalid characters. | HeaderValue | 
Assert that the header value is valid.
Raises an exception if invalid.
| Parameter Name | Type | Description | 
|---|---|---|
| $value | string | 
Returns: void
Filter the header value according to RFC 2822
| Parameter Name | Type | Description | 
|---|---|---|
| $value | string | 
Returns: string
Determine if the header value contains any invalid characters.
| Parameter Name | Type | Description | 
|---|---|---|
| $value | string | 
Returns: bool