- var_dump: documentation ( source)
- decbin: documentation ( source)
- unpack: documentation ( source)
- printf: documentation ( source)
<?php
$siret = unpack('13001202400050');
var_dump($siret);
$binval = decbin($siret);
printf('O : %b' . PHP_EOL, $binval);
$shifted = $binval >> 8;
printf('S : %b' . PHP_EOL, $shifted);
printf('I : %b' . PHP_EOL, $shifted << 8);