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<?php
namespace Httpful\Response;
final class Headers implements \ArrayAccess, \Countable {
private $headers;
/**
* @param array $headers
*/
private function __construct($headers)
{
$this->headers = $headers;
}
/**
* @param string $string
* @return Headers
*/
public static function fromString($string)
{
$lines = preg_split("/(\r|\n)+/", $string, -1, PREG_SPLIT_NO_EMPTY);
array_shift($lines); // HTTP HEADER
$headers = array();
foreach ($lines as $line) {
list($name, $value) = explode(':', $line, 2);
$headers[strtolower(trim($name))] = trim($value);
}
return new self($headers);
}
/**
* @param string $offset
* @return bool
*/
public function offsetExists($offset)
{
return isset($this->headers[strtolower($offset)]);
}
/**
* @param string $offset
* @return mixed
*/
public function offsetGet($offset)
{
if (isset($this->headers[$name = strtolower($offset)])) {
return $this->headers[$name];
}
}
/**
* @param string $offset
* @param string $value
* @throws \Exception
*/
public function offsetSet($offset, $value)
{
throw new \Exception("Headers are read-only.");
}
/**
* @param string $offset
* @throws \Exception
*/
public function offsetUnset($offset)
{
throw new \Exception("Headers are read-only.");
}
/**
* @return int
*/
public function count()
{
return count($this->headers);
}
/**
* @return array
*/
public function toArray()
{
return $this->headers;
}
}