php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #67478 Strange behaviour on casting to integer
Submitted: 2014-06-19 12:42 UTC Modified: 2014-06-20 05:05 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: upyx dot 00 at gmail dot com Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.5.13 OS: linux 64
Private report: No CVE-ID: None
View Developer Edit
 [2014-06-19 12:42 UTC] upyx dot 00 at gmail dot com 
Description:
------------
Returns huge negative value when casting float value greater then PHP_INT_MAX to integer.

Test script:
---------------
$ php -r 'var_dump(9223372036854775808);'
double(9.2233720368548E+18)
$ php -r 'var_dump((int)9223372036854775808);'
int(-9223372036854775808)
$ php -r 'var_dump((int)9223372036854775809);'
int(-9223372036854775808)

Expected result:
----------------
double(9.2233720368548E+18)
ERROR (or cut to PHP_INT_MAX, but not negative value!)
ERROR

Actual result:
--------------
double(9.2233720368548E+18)
int(-9223372036854775808)
int(-9223372036854775808)

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2014-06-19 17:49 UTC] aharvey@php.net
-Status: Open +Status: Not a bug
 [2014-06-19 17:49 UTC] aharvey@php.net 
Float -> integer conversion being undefined when the float is beyond PHP_INT_MAX is documented behaviour: http://php.net/manual/en/language.types.integer.php#language.types.integer.casting.from-float

In practice, this is to do with PHP using signed integers internally, but the official advice is "don't do that".
 [2014-06-20 05:05 UTC] upyx dot 00 at gmail dot com 
Ok! It was documented...
But this behaviour is bad.
If it doesn't work need trow exception, error or so on. But not quit break data.
 
PHP Copyright © 2001-2026 The PHP Group
All rights reserved. 		Last updated: Wed Oct 07 13:00:02 2026 UTC