// In case there are still some ISO-8859-15 chars in your UTF8 stored messages
function ConvertEntities($string, $quotes = ENT_COMPAT, $slashesstriping = TRUE, $nl2brshape = TRUE)
{
	if ( $slashesstriping )
      $string = stripslashes($string);
	
	// Check the real charset (UTF-8 -> ISO-8859-15)
	$first = ( !preg_match('`é`i', mb_convert_encoding($string.'é', 'UTF-8', 'ISO-8859-15') ) ? 'UTF-8, ISO-8859-15' : 'ISO-8859-15, UTF-8');
	
	// Check if a conversion is needed 
	if ( !mb_check_encoding($string,'ASCII') )
          $string = htmlentities($string, $quotes, mb_detect_encoding($string,$first) );
	else
	  $string = htmlentities($string,$quotes);
	
        // Just in case, also convert the \ in ’
	$string = strtr($string, array('\'' => '’'));

	// Convert the \r\n
	return ( $nl2brshape ) ? nl2br($string) : strtr($string,array(chr(10).chr(13) => ''));
}