Bug #14304 Updated: Potential problem with regex...
ID: 14304
Updated by: lobbin
Reported By: bajolet@toiletoine.net
Old Status: Feedback
Status: Closed
Bug Type: Regexps related
Operating System: Linux php3-2 2.4.7 #1 Thu Aug 9
PHP Version: 4.0.6
New Comment:
No feedback. Closing.
Previous Comments:
------------------------------------------------------------------------
[2001-12-12 01:41:11] zak@php.net
I cannot reproduce the problem under PHP 4.1.0. Can you
upgrade to this version?
------------------------------------------------------------------------
[2001-12-12 01:31:01] bajolet@toiletoine.net
The problem is there...
I got the first result :
>array(10) {
> [0]=>
> string(24) "<phpdig:ignore_message/>"
> [1]=>
> string(14) "ignore_message"
> [2]=>
> ...
But on the second, i got nothing but a 'maximum execution time exceeded'.
I traced my code with some echoes and flush(), and it seems that the php engine stays on the eregi()
function.
It not core dump, but Apache goes 100% CPU until the timeout occurs.
------------------------------------------------------------------------
[2001-12-11 17:39:59] zak@php.net
Thanks for the additional information.
I tested the code snippets provided on PHP 4.1.0 - they
all seem to operate as expected. The input of both
snippets (when fed to your original function) returns
'<br><i></i></td>'
The regular expressions provided later seem to work as
well.
The top snippet captures:
array(10) {
[0]=>
string(24) "<phpdig:ignore_message/>"
[1]=>
string(14) "ignore_message"
[2]=>
bool(false)
[3]=>
bool(false)
[4]=>
bool(false)
[5]=>
bool(false)
[6]=>
bool(false)
[7]=>
bool(false)
[8]=>
bool(false)
[9]=>
bool(false)
}
...and the bottom snippet captures:
array(10) {
[0]=>
string(31) "<phpdig:ignore_common_message/>"
[1]=>
string(21) "ignore_common_message"
[2]=>
bool(false)
[3]=>
bool(false)
[4]=>
bool(false)
[5]=>
bool(false)
[6]=>
bool(false)
[7]=>
bool(false)
[8]=>
bool(false)
[9]=>
bool(false)
}
Is this the output that you get with PHP 4.0.6? Please let
me know!
------------------------------------------------------------------------
[2001-12-09 08:08:18] bajolet@toiletoine.net
Changed bug type to Regexps
------------------------------------------------------------------------
[2001-12-09 08:00:37] bajolet@toiletoine.net
I isolate the bug :
this works :
eregi('<phpdig:([a-z0-9_]*)[[:blank:]]*(src=)*["\']*([a-z0-9./_-]+)*["\']*[[:blank:]]*/>','<br><i><phpdig:ignore_message/></i></td>',$regs);
this doesn't (php loops) :
eregi('<phpdig:([a-z0-9_]*)[[:blank:]]*(src=)*["\']*([a-z0-9./_-]+)*["\']*[[:blank:]]*/>','<br><i><phpdig:ignore_common_message/></i></td>',$regs);
------------------------------------------------------------------------
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