- var_dump: documentation ( source)
- mb_detect_encoding: documentation ( source)
<?php
var_dump(mb_detect_encoding("\x19", "ASCII,7bit,8bit", true));
var_dump(mb_detect_encoding("\x20", "ASCII,7bit,8bit", true));
var_dump(mb_detect_encoding("\x21", "ASCII,7bit,8bit", true));
var_dump(mb_detect_encoding("\x8F", "ASCII,7bit,8bit", true));