This implements an SVG handler using the libxml reader API. This does
not parse the entire document but instead uses a pull parser to locate
the root element, check whether it's an svg root, do some extra sanity
checks on the attribute, and fill in the php_gfxinfo structure.
This was originally introduced as a workaround for a libxml2 bug [1].
This bug has been fixed for more than a decade [2], and we can use the
libxml2 API again. We bumped our version requirement for libxml2 beyond
that in 7.4 [3].
[1] 7e53511ec8
[2] 3ffe90ea1c
[3] 74235ca5f3
Closes GH-18706.
xmlSave() also can flush in some cases. When the encoding is not
available this can fail for short inputs, resulting in an empty string
which is interned but then wrongly tagged by RETURN_NEW_STR.
Fix this by checking the error condition and switching to RETURN_STR for
defense-in-depth.
This issue also exists on 8.3, but does not crash; however, due to the
different API usage internally I cannot easily fix it on 8.3. There it
gives a partial output.
Closes GH-18606.
We prefer clean solutions (such as declaring the proper type in the
first place, or introducing a portable format specifier) where easily
possible, but resort to casts otherwise.
We also port f1480ab14b.
This was a bug in both libxml and PHP.
We follow up with the same change as done in GNOME/libxml@b3871dd138.
Changing away from `xmlOutputBufferCreateFilenameDefault` is not
possible yet because this is a stable branch and would break BC.
Closes GH-17254.
libxml2 2.13.0 introduced some relevant changes regarding the treatment
of file paths on Windows[1]. Thus we un-xfail bug69753.phpt and its
companion, and we adjust dom004.phpt. And we also disable the
workaround for erroneous file:/ URIs on Windows.
[1] <8ab1b122c4>
Closes GH-16536.
The template element in HTML 5 is special in the sense that it does not
add its contents into the DOM tree, but instead keeps them in a separate
shadow DOM document fragment. Interacting with the DOM tree cannot touch
the elements in the document fragment.
Closes GH-14906.
The serialization process uses the system allocator and requires a copy
to request allocated memory once finished. This patch improves this by
using smart_str to build the resulting string, reducing the number of
copies and reducing total peak memory usage.
