Description:
------------
Hello,

While doing some tests, I discovered the 'P' format (unsigned long long (always 64 bit, little endian byte order)) and the 'J' format (unsigned long long (always 64 bit, big endian byte order)) are not giving the expected results on my Windows 7 x64 test machine with PHP 7.0.7RC1.

Indeed, they don't account for the "unsigned" nature and output the signed version.

Indeed:

unpack('P', "\xC0\x00\xF8\x90\x32\x04\x00\x90") will output "-8070445917020880704".

The expected result is "13835331353480265872".

unpack('J', "\xC0\x00\xF8\x90\x32\x04\x00\x90") will output "-4611412720229285744".

The expected result is "10376298156688670912".


No error/warning message will be displayed.




Test script:
---------------
<?php

var_dump( unpack('P', "\xC0\x00\xF8\x90\x32\x04\x00\x90") );

var_dump( unpack('J', "\xC0\x00\xF8\x90\x32\x04\x00\x90") );


Expected result:
----------------
array(1) {
  [1]=>
  int(13835331353480265872)
}
array(1) {
  [1]=>
  int(10376298156688670912)
}


Actual result:
--------------
array(1) {
  [1]=>
  int(-8070445917020880704)
}
array(1) {
  [1]=>
  int(-4611412720229285744)
}