[3.10] [PHP 8.1] Fix HtmlDocument preg_split(): Passing null to $limit of type int

[beat]

Pull Request for Issue # none, found and fixed directly here.

Summary of Changes

Fixes PHP 8.1 incompatibility Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in libraries/src/Document/HtmlDocument.php on line 595

Actually, null would converts to 0, but it's the same as the function's default value of -1 that was expected there.

See https://www.php.net/manual/en/function.preg-split.php :

limit
If specified, then only substrings up to limit are returned with the rest of the string being placed in the last substring. A limit of -1 or 0 means "no limit".

Testing Instructions

Open administrator backend in debug mode (with all incl. deprecation warnings turned on), and see this warning, then apply patch and see it disappear.

Actual result BEFORE applying this Pull Request

Deprecated: preg_split(): Passing null to parameter #3 ($limit) of type int is deprecated in libraries/src/Document/HtmlDocument.php on line 595

Expected result AFTER applying this Pull Request

warning disappeared.

Documentation Changes Required

none.

[richard67]

I have tested this item ✅ successfully on 81ca5b3

Code review with respect to PHP documentation.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36775.}

[Fedik]

I have tested this item ✅ successfully on 81ca5b3

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36775.}

[Fedik]

R2C

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/36775.}

[zero-24]

Thanks merging.