} elseif ( strcasecmp( $in, 'UTF-8' ) == 0 && strcasecmp( $out, 'x' ) == 0 ) {
# Double Xs only if they follow cxapelutaj literoj.
return preg_replace_callback(
'/((?:[cghjsu]|\xc4[\x88\x89\x9c\x9d\xa4\xa5\xb4\xb5]|\xc5[\x9c\x9d\xac\xad])x*)/i',
} elseif ( strcasecmp( $in, 'UTF-8' ) == 0 && strcasecmp( $out, 'x' ) == 0 ) {
# Double Xs only if they follow cxapelutaj literoj.
return preg_replace_callback(
'/((?:[cghjsu]|\xc4[\x88\x89\x9c\x9d\xa4\xa5\xb4\xb5]|\xc5[\x9c\x9d\xac\xad])x*)/i',