note 109328 added to function.pack
| From: | petepostma at gmail dot spam dot com | Date: | Fri, 06 Jul 2012 17:27:01 +0000 |
| Subject: | note 109328 added to function.pack | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-189055@lists.php.net to get a copy of this message | ||
Even though in a 64-bit architecure intval(6123456789) = 6123456789, and sprintf('%b',
5000000000) = 100101010000001011111001000000000
pack will not treat anything passed to it as 64-bit. If you want to pack a 64-bit integer:
$big = 5000000000;
$left = 0xffffffff00000000;
$right = 0x00000000ffffffff;
$l = ($big & $left) >>32;
$r = $big & $right;
$good = pack('NN', $l, $r);
$urlsafe = str_replace(array('+','/'), array('-','_'),
base64_encode($good));
//done!
//rebuild:
$unurl = str_replace(array('-','_'), array('+','/'),
$urlsafe);
$binary = base64_decode($unurl);
$set = unpack('N2', $tmp);
print_r($set);
$original = $set[1] << 32 | $set[2];
echo $original, "\r\n";
results in:
Array
(
[1] => 1
[2] => 705032704
)
5000000000
but ONLY on a 64-bit enabled machine and PHP distro.
----
Server IP: 69.147.83.197
Probable Submitter: 216.82.251.227
----
Manual Page -- http://www.php.net/manual/en/function.pack.php
Edit -- https://master.php.net/note/edit/109328
Del: integrated -- https://master.php.net/note/delete/109328/integrated
Del: useless -- https://master.php.net/note/delete/109328/useless
Del: bad code -- https://master.php.net/note/delete/109328/bad+code
Del: spam -- https://master.php.net/note/delete/109328/spam
Del: non-english -- https://master.php.net/note/delete/109328/non-english
Del: in docs -- https://master.php.net/note/delete/109328/in+docs
Del: other reasons-- https://master.php.net/note/delete/109328
Reject -- https://master.php.net/note/reject/109328
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