- array_map: documentation ( source)
- base_convert: documentation ( source)
- str_split: documentation ( source)
<?php
$KEY_BASE = str_split("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
$BASE = 62;
$num = 11112887;
$num = intval($num);
$num = array_map('intval',str_split($num));
$result = '';
$remainder = 0;
foreach ($num as $digit) {
$remainder = $digit%$BASE;
echo 'remainder '.$remainder;
echo 'key remainder '.$KEY_BASE[$remainder];
$result.=$KEY_BASE[$remainder];
//echo $digit;
}
//echo $result;
echo base_convert($num,'0123456789','0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');