The HttpMessage class
PHP Manual

HttpMessage::prepend

(PECL pecl_http >= 0.22.0)

HttpMessage::prepend — Prepend message(s)

Description

public void HttpMessage::prepend ( HttpMessage $message [, bool $top = true ] )

Prepends message(s) to the HTTP message.

Parameters

message

HttpMessage object to prepend

top

whether to prepend to the top most or right this message

Errors/Exceptions

Throws HttpInvalidParamException if the message is located within the same message chain.

The HttpMessage class
PHP Manual