Message.php

Returns the Message's body.

Returns an array containing all headers.

Returns a single header object. If multiple headers with the same name exist, then will return an array of header objects.

Determines whether a header exists.

Retrieves a comma-separated string of the values for a single header. This method returns all of the header values of the given case-insensitive header name as a string concatenated together using a comma. NOTE: Not all header values may be appropriately represented using comma concatenation. For such headers, use getHeader() instead and supply your own delimiter when concatenating.

Returns the HTTP Protocol Version.