/**
* Redirect to another URL.
*
* If the headers have not been sent the redirect will be accomplished using a "301 Moved Permanently"
* or "303 See Other" code in the header pointing to the new location. If the headers have already been
* sent this will be accomplished using a JavaScript statement.
*
* @param string $url The URL to redirect to. Can only be http/https URL
* @param boolean $moved True if the page is 301 Permanently Moved, otherwise 303 See Other is assumed.
*
* @return void
*
* @since 1.0
*/
public function redirect($url, $moved = false)
{
// Check for relative internal links.
if (preg_match('#^index\\.php#', $url)) {
$url = $this->get('uri.base.full') . $url;
}
// Perform a basic sanity check to make sure we don't have any CRLF garbage.
$url = preg_split("/[\r\n]/", $url);
$url = $url[0];
/*
* Here we need to check and see if the URL is relative or absolute. Essentially, do we need to
* prepend the URL with our base URL for a proper redirect. The rudimentary way we are looking
* at this is to simply check whether or not the URL string has a valid scheme or not.
*/
if (!preg_match('#^[a-z]+\\://#i', $url)) {
// Get a JURI instance for the requested URI.
$uri = new Uri($this->get('uri.request'));
// Get a base URL to prepend from the requested URI.
$prefix = $uri->toString(array('scheme', 'user', 'pass', 'host', 'port'));
// We just need the prefix since we have a path relative to the root.
if ($url[0] == '/') {
$url = $prefix . $url;
} else {
$parts = explode('/', $uri->toString(array('path')));
array_pop($parts);
$path = implode('/', $parts) . '/';
$url = $prefix . $path . $url;
}
}
// If the headers have already been sent we need to send the redirect statement via JavaScript.
if ($this->checkHeadersSent()) {
echo "<script>document.location.href='{$url}';</script>\n";
} else {
// We have to use a JavaScript redirect here because MSIE doesn't play nice with utf-8 URLs.
if ($this->client->engine == Web\WebClient::TRIDENT && !String::is_ascii($url)) {
$html = '<html><head>';
$html .= '<meta http-equiv="content-type" content="text/html; charset=' . $this->charSet . '" />';
$html .= '<script>document.location.href=\'' . $url . '\';</script>';
$html .= '</head><body></body></html>';
echo $html;
} else {
// All other cases use the more efficient HTTP header for redirection.
$this->header($moved ? 'HTTP/1.1 301 Moved Permanently' : 'HTTP/1.1 303 See other');
$this->header('Location: ' . $url);
$this->header('Content-Type: text/html; charset=' . $this->charSet);
// Send other headers that may have been set.
$this->sendHeaders();
}
}
// Close the application after the redirect.
$this->close();
}
