- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
- mb_strcut: documentation ( source)
- mb_internal_encoding: documentation ( source)
<?php
$input = 'あaいb';
$bytes_length = 10;
$encoding = "ISO-2022-JP";
$converted_str = mb_convert_encoding($input, $encoding, mb_internal_encoding());
$cut_str = mb_strcut($converted_str, 0, $bytes_length, $encoding);
$reconverted_str = mb_convert_encoding($cut_str, mb_internal_encoding(), $encoding);
var_dump($reconverted_str);