#http\Message http\Message::addHeaders(array $headers[, bool $append = false])

Add headers, optionally appending values, if header keys already exist. See http\Message::addHeader() and http\Message::setHeaders().

Params:#

• array $headers#
  The HTTP headers to add.
• Optional bool $append# = false
  Whether to append values for existing headers.

Returns:#

• http\Message, self.

Example:#

<?php
$msg = new http\Message;

$msg->addHeaders(["Cache-Control" => "public"]);
var_dump($msg->getHeaders());

$msg->addHeaders(["Cache-Control" => "private"]);
var_dump($msg->getHeaders());

$msg->addHeaders(["Cache-Control" => "must-revalidate"], true);
var_dump($msg->getHeaders());

echo $msg;
?>

Yields:

array(1) {
  ["Cache-Control"]=>
  string(6) "public"
}
array(1) {
  ["Cache-Control"]=>
  string(7) "private"
}
array(1) {
  ["Cache-Control"]=>
  string(24) "private, must-revalidate"
}
Cache-Control: private, must-revalidate