The code in the attached test used to work correctly in PHP 8.0, but not
in 8.1+. This is because PHP 8.1+ uses a more modern version of pcre2
than PHP 8.0, and that pcre2 versions has a regression.
While upgrading pcre2lib seems to be only done for the master branch, it
is possible to backport upstream fixes to stable branches. This has been
already done in the past in for JIT regressions [1], so it is not
unprecedented.
We backport the upstream pcre2 fix [2].
[1] https://github.com/php/php-src/commit/788a701e222
[2] https://github.com/PCRE2Project/pcre2/pull/135
Closes GH-12108.
The ZVAL_ARR macro always set the zval type_info to IS_ARRAY_EX, even if the
hash table is immutable. Since in preg_replace_callback_array() we can return
the passed array directly, and that passed array can be immutable, we need to
reset the type_flags to keep the VM from performing ref-counting on the array.
Fixes GH-10968
Closes GH-10970
In 8b3c1a3, this was disallowed to fix#55856, which was a security
issue caused by the /e modifier. The fix that was made was the
"Easier fix" as described in the original report.
With this fix, pattern strings are no longer treated as null terminated,
so null characters can be placed inside and matched against with regex
patterns without security problems, so there is no longer a reason to
give the error. Allowing this is consistent with the behaviour of many
other languages, including JavaScript, and thanks to PCRE2[0], it does
not require manually escaping null characters. Now that we can avoid the
error here without the cost of escaping characters, there is really no
need anymore to stray here from the conventional behaviour.
Currently, null characters are still disallowed before the first
delimiter and in the options section at the end of a regex string, but
these error messages have been updated.
[0] Since PCRE2, pattern strings no longer have to be null terminated,
and raw null characters match as normal.
Closes GH-8114.
https://wiki.php.net/rfc/strtolower-ascii means that these functions no longer
depend on the current locale in php 8.2. Before that, this was unsafe to
evaluate at compile time.
Followup to GH-7506
Add strcmp/strcasecmp/strtolower/strtoupper functions
Add bin2hex/hex2bin and related functions
Update test of garbage collection using strtolower to use something else to create a refcounted string
Trying to allocate a `zend_string` with a length only slighty smaller
than `SIZE_MAX` causes an integer overflow; we make sure that this
doesn't happen by catering to the maximal overhead of a `zend_string`.
Closes GH-7597.
- for packed arrays we store just an array of zvals without keys.
- the elements of packed array are accessible throuf as ht->arPacked[i]
instead of ht->arData[i]
- in addition to general ZEND_HASH_FOREACH_* macros, we introduced similar
familied for packed (ZEND_HASH_PACKED_FORECH_*) and real hashes
(ZEND_HASH_MAP_FOREACH_*)
- introduced an additional family of macros to access elements of array
(packed or real hashes) ZEND_ARRAY_ELEMET_SIZE, ZEND_ARRAY_ELEMET_EX,
ZEND_ARRAY_ELEMET, ZEND_ARRAY_NEXT_ELEMENT, ZEND_ARRAY_PREV_ELEMENT
- zend_hash_minmax() prototype was changed to compare only values
Because of smaller data set, this patch may show performance improvement
on some apps and benchmarks that use packed arrays. (~1% on PHP-Parser)
TODO:
- sapi/phpdbg needs special support for packed arrays (WATCH_ON_BUCKET).
- zend_hash_sort_ex() may require converting packed arrays to hash.
Niels Dossche