* PHP-8.4:
Fix IntlDateFormatter::parseToCalendar() reference type system breaks
datefmt_parse/datefmt_localtime references type system fixes
Fix GH-18438: Handling of empty data and errors in ZipArchive::addPattern
There is a ZPP arginfo violation because the empty return or error
return is not always properly handled.
And there is also a memory leak if creating the regular expression
instance fails.
Closes GH-18438.
Libzip already cleans up the previous callback, so when that means:
1. The callback zval being already copied over the previous one causes
libzip to clean up the new callback object. This is the root cause.
2. Our own code to clean the old callback is redundant.
Closes GH-18432.
There are two hot spots on my machines:
1. We copy the string because the internal PHP API works in-place.
2. The conversion of hex characters is slow due to going through the C
locale handling.
This patch resolves the first hot spots by introducing 2 new internal
APIs that avoid the redundant copy and allocate an empty string upfront.
The second hotspot is resolved by having a specialised htoi handler.
For the following benchmark:
```php
$encoded = "Hello%20World%21+This%20is%20a%20test%3A%20%40%23%24%25%5E%26*%28%29";
for ($i=0;$i<2000000;$i++) {
rawurldecode($encoded);
urldecode($encoded);
}
```
On an i7-4790:
```
Benchmark 1: ./sapi/cli/php x.php
Time (mean ± σ): 364.8 ms ± 3.7 ms [User: 359.9 ms, System: 3.3 ms]
Range (min … max): 359.9 ms … 372.0 ms 10 runs
Benchmark 2: ./sapi/cli/php_old x.php
Time (mean ± σ): 565.5 ms ± 4.9 ms [User: 561.8 ms, System: 2.5 ms]
Range (min … max): 560.7 ms … 578.2 ms 10 runs
Summary
./sapi/cli/php x.php ran
1.55 ± 0.02 times faster than ./sapi/cli/php_old x.php
```
On an i7-1185G7:
```
Benchmark 1: ./sapi/cli/php x.php
Time (mean ± σ): 708.8 ms ± 6.1 ms [User: 701.4 ms, System: 6.3 ms]
Range (min … max): 701.9 ms … 722.3 ms 10 runs
Benchmark 2: ./sapi/cli/php_old x.php
Time (mean ± σ): 1.311 s ± 0.019 s [User: 1.300 s, System: 0.008 s]
Range (min … max): 1.281 s … 1.348 s 10 runs
Summary
./sapi/cli/php x.php ran
1.85 ± 0.03 times faster than ./sapi/cli/php_old x.php
```
Closes GH-18378.
This reverts commit 8dc799aac7.
Originally, this was going to be deprecated in libxml2 2.14, but this
didn't end up happening in the end, and the replacement function that we
used got deprecated instead. So fix the deprecation warning by reverting
to the original code.
Closes GH-18407.
