- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
- bin2hex: documentation ( source)
<?php
$a = 123.45;
$b = 1;
$str = 'ー';
var_dump(bin2hex($str));
$str_2 = mb_convert_encoding($str, 'SJIS-win', 'UTF-8');
var_dump(bin2hex($str_2));
?>