* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
* @version SVN: $Id: $
* @link http://phptal.org/
*/
class PHPTAL_ExceptionHandler
{
private $encoding;
function __construct($encoding)
{
$this->encoding = $encoding;
}
/**
* PHP's default exception handler allows error pages to be indexed and can reveal too much information,
* so if possible PHPTAL sets up its own handler to fix this.
*
* Doesn't change exception handler if non-default one is set.
*
* @param Exception e exception to re-throw and display
*
* @return void
* @throws Exception
*/
public static function handleException(Exception $e, $encoding)
{
// PHPTAL's handler is only useful on fresh HTTP response
if (PHP_SAPI !== 'cli' && !headers_sent()) {
$old_exception_handler = set_exception_handler(array(new PHPTAL_ExceptionHandler($encoding), '_defaultExceptionHandler'));
if ($old_exception_handler !== NULL) {
restore_exception_handler(); // if there's user's exception handler, let it work
}
}
throw $e; // throws instead of outputting immediately to support user's try/catch
}
/**
* Generates simple error page. Sets appropriate HTTP status to prevent page being indexed.
*
* @param Exception e exception to display
*/
public function _defaultExceptionHandler($e)
{
if (!headers_sent()) {
header('HTTP/1.1 500 PHPTAL Exception');
header('Content-Type:text/html;charset='.$this->encoding);
}
$line = $e->getFile();
if ($e->getLine()) {
$line .= ' line '.$e->getLine();
}
if (ini_get('display_errors')) {
$title = get_class($e).': '.htmlspecialchars($e->getMessage());
$body = "\n".htmlspecialchars($e->getMessage()).'
' .
'In '.htmlspecialchars($line)."
\n".htmlspecialchars($e->getTraceAsString()).'
';
} else {
$title = "PHPTAL Exception";
$body = "This page cannot be displayed.
" .
"Enable display_errors to see detailed message.
";
}
echo "\n";
echo $title.'PHPTAL Exception
'.$body;
error_log($e->getMessage().' in '.$line);
echo ''.str_repeat(' ', 100)."\n"; // IE won't display error pages < 512b
exit(1);
}
}