/**
* Returns the title of a html document.
* @param string $string The contents of the input document.
* @param string $input_encoding The encoding of the input document. If the value is not set, it is detected.
* @param string $$output_encoding The encoding of the retrieved title. If the value is not set, the system encoding is assumend.
* @return string The retrieved title, html-entities and extra-whitespace between the words are cleaned.
*/
function api_get_title_html(&$string, $output_encoding = null, $input_encoding = null) {
if (@preg_match('/<head.+<title[^>]*>(.*)<\/title>/msi', $string, $matches)) {
if (empty($output_encoding)) {
$output_encoding = api_get_system_encoding();
}
if (empty($input_encoding)) {
$input_encoding = api_detect_encoding_html($string);
}
return trim(@preg_replace('/\s+/', ' ', api_html_entity_decode(api_convert_encoding($matches[1], $output_encoding, $input_encoding), ENT_QUOTES, $output_encoding)));
}
return '';
}
/**
* This function streams a string to the client for download.
* You have to ensure that the calling script then stops processing (exit();)
* otherwise it may cause subsequent use of the page to want to download
* other pages in php rather than interpreting them.
*
* @param string $full_string The string contents
* @param boolean $forced Whether "save" mode is forced (or opening directly authorized)
* @param string $name The name of the file in the end (including extension)
*
* @return false if file doesn't exist, true if stream succeeded
*/
public static function string_send_for_download($full_string, $forced = false, $name = '')
{
$filename = $name;
$len = strlen($full_string);
if ($forced) {
//force the browser to save the file instead of opening it
header('Content-type: application/octet-stream');
//header('Content-Type: application/force-download');
header('Content-length: ' . $len);
if (preg_match("/MSIE 5.5/", $_SERVER['HTTP_USER_AGENT'])) {
header('Content-Disposition: filename= ' . $filename);
} else {
header('Content-Disposition: attachment; filename= ' . $filename);
}
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE')) {
header('Pragma: ');
header('Cache-Control: ');
header('Cache-Control: public');
// IE cannot download from sessions without a cache
}
header('Content-Description: ' . $filename);
header('Content-transfer-encoding: binary');
echo $full_string;
return true;
//You have to ensure that the calling script then stops processing (exit();)
//otherwise it may cause subsequent use of the page to want to download
//other pages in php rather than interpreting them.
} else {
//no forced download, just let the browser decide what to do according to the mimetype
$content_type = self::file_get_mime_type($filename);
header('Expires: Wed, 01 Jan 1990 00:00:00 GMT');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-cache, must-revalidate');
header('Pragma: no-cache');
switch ($content_type) {
case 'text/html':
$encoding = @api_detect_encoding_html($full_string);
if (!empty($encoding)) {
$content_type .= '; charset=' . $encoding;
}
break;
case 'text/plain':
$encoding = @api_detect_encoding(strip_tags($full_string));
if (!empty($encoding)) {
$content_type .= '; charset=' . $encoding;
}
break;
}
header('Content-type: ' . $content_type);
header('Content-Length: ' . $len);
$user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
if (strpos($user_agent, 'msie')) {
header('Content-Disposition: ; filename= ' . $filename);
} else {
header('Content-Disposition: inline; filename= ' . $filename);
}
echo $full_string;
//You have to ensure that the calling script then stops processing (exit();)
//otherwise it may cause subsequent use of the page to want to download
//other pages in php rather than interpreting them.
return true;
}
}
