public static function reset()
{
request::$accept_charsets = NULL;
request::$accept_encodings = NULL;
request::$accept_languages = NULL;
request::$accept_types = NULL;
request::$user_agent = NULL;
}
/**
* Parses client's HTTP Accept request header, and builds array structure representing it.
*
* @return void
*/
protected static function parse_accept_header()
{
// Run this function just once
if (request::$accept_types !== NULL) {
return;
}
// Initialize accept_types array
request::$accept_types = array();
// No HTTP Accept header found
if (empty($_SERVER['HTTP_ACCEPT'])) {
// Accept everything
request::$accept_types['*']['*'] = 1;
return;
}
// Remove linebreaks and parse the HTTP Accept header
foreach (explode(',', str_replace(array("\r", "\n"), '', $_SERVER['HTTP_ACCEPT'])) as $accept_entry) {
// Explode each entry in content type and possible quality factor
$accept_entry = explode(';', trim($accept_entry), 2);
// Explode each content type (e.g. "text/html")
$type = explode('/', $accept_entry[0], 2);
// Skip invalid content types
if (!isset($type[1])) {
continue;
}
// Assume a default quality factor of 1 if no custom q value found
$q = (isset($accept_entry[1]) and preg_match('~\\bq\\s*+=\\s*+([.0-9]+)~', $accept_entry[1], $match)) ? (double) $match[1] : 1;
// Populate accept_types array
if (!isset(request::$accept_types[$type[0]][$type[1]]) or $q > request::$accept_types[$type[0]][$type[1]]) {
request::$accept_types[$type[0]][$type[1]] = $q;
}
}
}
/**
* Parses a client's HTTP Accept header
*/
protected static function parse_accept_content_header()
{
// Run this function just once
if (request::$accept_types !== NULL) {
return;
}
// No HTTP Accept header found
if (empty($_SERVER['HTTP_ACCEPT'])) {
// Accept everything
request::$accept_types['*']['*'] = 1;
} else {
request::$accept_types = array();
foreach (request::parse_accept_header($_SERVER['HTTP_ACCEPT']) as $type => $q) {
// Explode each content type (e.g. "text/html")
$type = explode('/', $type, 2);
// Skip invalid content types
if (!isset($type[1])) {
continue;
}
request::$accept_types[$type[0]][$type[1]] = $q;
}
}
}
