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Bug #12590 hex const (0xABCDEF01) parsing error
Submitted: 2001-08-06 07:35 UTC Modified: 2001-10-18 16:00 UTC
From: vda at port dot imtp dot ilyichevsk dot odessa dot ua Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 4.0.5 OS: Linux
Private report: No CVE-ID: None
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From: vda at port dot imtp dot ilyichevsk dot odessa dot ua
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 [2001-08-06 07:35 UTC] vda at port dot imtp dot ilyichevsk dot odessa dot ua 
Looks like there's some trouble with parsing big hex consts
(those with sign bit set). Try this:
...
echo (0x7FFF00FF & 0xFFFF); //echoes 255
echo (0x800000FF & 0xFFFF); //echoes 0!!!
...
0x800000FF apparently is mis-parsed.

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 [2001-10-18 15:45 UTC] sander@php.net 
What would you expect to get? On my machine, it prints out 255 twice.
 [2001-10-18 16:00 UTC] jeroen@php.net 
On most platforms (including i386), PHP does not support integers of 2**31 (0x80 00 00 00) and higher.

See the manual on integers. So the result of the second expression is unknown. (0x800000FF is converted to float because of integer-overflow, and you cannot use bitwise fucntions on floats)
 
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