- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
- mb_substr: documentation ( source)
- mb_strlen: documentation ( source)
- mb_strtoupper: documentation ( source)
- mb_strtolower: documentation ( source)
<?php
$item = mb_convert_encoding(
'¨l',
'ISO-8859-1',
'UTF-8'
);
$encoding = 'UTF-8';
$ret = '';
$max = mb_strlen($item ?? '', $encoding);
for ($i = 0; $i < $max; $i++) {
$char = mb_substr($item, $i, 1, $encoding);
$up = mb_strtoupper($char, $encoding);
$low = mb_strtolower($char, $encoding);
$ret .= ($up != $low) ? '[' . $up . $low . ']' : $char;
}
var_dump($ret);