ID: 33468
Comment by: bugs dot php dot net at chsc dot dk
Reported By: mjsherman at chartermi dot net
Status: Assigned
Bug Type: PCRE related
Operating System: *
PHP Version: 5CVS, 4CVS (2005-08-09)
Assigned To: andrei
New Comment:
An even simpler testcase:
$data = str_repeat('a', 9999);
preg_match('/(?:[a])*/', $data, $reg);
Notice that the parenthesis is non-capturing, i.e. we don't even put a
lot of elements in the $reg array.
Previous Comments:
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[2005-08-09 10:36:28] [EMAIL PROTECTED]
Happens also with the new PCRE 6.2 lib which was bundled in PHP CVS
today.
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[2005-06-24 19:30:06] [EMAIL PROTECTED]
Andrei, could you check it plz.
As far as I understand, this is something not related to PHP, but just
another PCRE limitation.
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[2005-06-24 19:21:22] mjsherman at chartermi dot net
Just tested with 5.1.0beta2
Same problem.
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[2005-06-24 18:28:01] [EMAIL PROTECTED]
Please try using this CVS snapshot:
http://snaps.php.net/php5-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5-win32-latest.zip
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[2005-06-24 18:24:34] mjsherman at chartermi dot net
Description:
------------
preg_match, if passed a long subject string, fails unexpectedly.
I have read through the PCRE limitations, and can't see that this is
one of them. I have tried increasing memory limit (to increase the
stack) with the same results.
Cutoff and examples are below:
Reproduce code:
---------------
$subject = str_repeat('a',100);
$subject .= str_repeat('b', 4370);
$subject .= str_repeat('a', 100);
if (preg_match('/(.*).*?\1/',$subject)) {
echo "OK\n";
}
Expected result:
----------------
"OK" to be printed after matching 100 "a"s.
If 4370 is changed to 4369, then "OK" is printed.
Actual result:
--------------
With 4370 'b's, nothing is printed (failed preg_match)
With 4369 'b's, "OK" is printed (worked).
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Edit this bug report at http://bugs.php.net/?id=33468&edit=1
