function bbp_encode_callback( $matches = array() ) {

	// Trim inline code, not pre blocks (to prevent removing indentation)
	if ( "`" === $matches[1] ) {
		$content = trim( $matches[2] );
	} else {
		$content = $matches[2];
	}

	// Do some replacing
	$content = htmlspecialchars( $content, ENT_QUOTES );
	$content = str_replace( array( "\r\n", "\r" ), "\n", $content );
	$content = preg_replace( "|\n\n\n+|", "\n\n", $content );
	$content = str_replace( '&', '&', $content );
	$content = str_replace( '<',  '<',  $content );
	$content = str_replace( '>',  '>',  $content );

	// Wrap in code tags
	$content = '<code>' . $content . '</code>';

	// Wrap blocks in pre tags
	if ( "`" !== $matches[1] ) {
		$content = "\n<pre>" . $content . "</pre>\n";
	}

	return $content;
}