/**
* Find value of the first header with given name.
*
* @param list List of headers from `resolve()`.
* @param string Case insensitive header name.
* @return string Value of the header or null if not found.
* @task resolve
*/
public static function getHeader(array $headers, $search)
{
Utils::assert_instances_of($headers, 'array');
foreach ($headers as $header) {
list($name, $value) = $header;
if (strcasecmp($name, $search) == 0) {
return $value;
}
}
return null;
}
