From: shailesh_bavadekar at yahoo dot com
Operating system: all
PHP version: 5.1.4
PHP Bug Type: *General Issues
Bug description: integer type conversion behavior is inconsistent
Description:
------------
When an integer operand value exceeds 2^32 the php
runtime automatically converts it into float. This
is completely transparent to the applications
dealing with integer arithmetic. It allows PHP
applications to handle integers upto 2^53. (Larger
values don't work correctly due to precision
limits of 64 bit floating point format).
However things are not so clear when numeric
values are initially expressed as strings (e.g.
read from a file or network).
e.g. consider following code -
<?php
$i1 = 4294967296;
$i2 = 2147483647 * 2 + 2;
$i3 = (integer) 4294967296;
$i4 = (integer) "4294967296";
echo $i1 . "\n"; // prints 4294967296
echo $i2 . "\n"; // prints 4294967296
echo $i3 . "\n"; // prints 0!
echo $i4 . "\n"; // prints 2147483647!!
?>
Proposed fix: The "automatic conversion to float"
rule should be uniformly applied in all these
cases even if the program wants to explicitly cast
to integer.
--
Edit bug report at http://bugs.php.net/?id=37993&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37993&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=37993&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37993&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37993&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37993&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37993&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37993&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37993&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37993&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37993&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37993&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37993&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37993&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37993&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37993&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37993&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37993&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37993&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37993&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37993&r=mysqlcfg
