- var_dump: documentation ( source)
- utf8_encode: documentation ( source)
<?php
var_dump(utf8_encode(chr(128)));
var_dump(utf8_encode(chr(146)));
var_dump(utf8_encode(chr(154)));
var_dump(utf8_encode(chr(156)));
var_dump(utf8_encode(chr(158)));
var_dump(utf8_encode(chr(159)));
var_dump(utf8_encode(chr(233)));