1 year ago
#272018
Stefano Radaelli
php: unexpected pack("N")/unpack("N") behaviour with negative number
I have such script to pack and unpack a negative number:
<?
$from = -123456;
$to = unpack("N", pack("N", $from));
echo $to[1] . "\n";;
?>
On an Linux host (RHEL 2.6.32-220.el6.x86_64) with PHP 5.4.7 $to[1] has the same value as input (-123456)
On another Linux host (RHEL 3.10.0-1160.42.2.el7.x86_64) with PHP 7.3.6 the $to[1] has value 4294843840.
What's wrong? Why PHP 7 is acting so?
php
32-bit
pack
unpack
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