<?php
function pack_encode($val) {
$str = '';
while ($val > 0) {
$str .= chr($val & 0xFF);
$val = $val >> 8;
}
// "/" json-encodes poorly and "=" is padding
return str_replace(
array('/', '='),
array('_', ''),
base64_encode($str)
);
}
for ($i=0; $i<32; $i++) {
echo pack_encode($i) . "\n";
}
/*
$arr = array();
$packed = pack('N', 32767);
for ($i=0; $i<strlen($packed); $i++) {
$arr[$i] = ord($packed[$i]);
}
print_r($arr);
function pack_encode($val) {
$b64 = base64_encode(pack($format, $val));
return str_replace(array('/', '='), array('_', ''), $b64); // "/" json-encodes poorly and "=" is padding
}
function pack_decode($bin) {
$b64 = str_replace('_', '/', $bin); // un-padded
$data = unpack('C'.(length($bin)/2), base64_decode($b64, false));
$val = 0;
foreach ($data as $v) {
$val = ($val<<$width) | $v;
}
return $val;
}
$max = 32767;
$n = 20;
$step = intval($max/$n);
for ($i=0; $i<=$n; $i++) {
$val = $i*$step;
$enc = pack_encode($val);
$dec = pack_decode($val);
echo "$enc $dec $val\n";
}
*/
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- AQ
Ag
Aw
BA
BQ
Bg
Bw
CA
CQ
Cg
Cw
DA
DQ
Dg
Dw
EA
EQ
Eg
Ew
FA
FQ
Fg
Fw
GA
GQ
Gg
Gw
HA
HQ
Hg
Hw
preferences:
316.26 ms | 405 KiB | 455 Q