The `IXR_Message` class declares a property `_currentTag`, which is never assigned or used. It does assign to `currentTag` instead, which outside of that one assignment is never used either.
Since there are various other underscore-prefixed properties declared on the class, including one named `_currentTagContents` which is used in several places, it appears that the declared property is correct and the assignment is a typo.
This commit resolves a notice on PHP 8.2:
{{{
Deprecated: Creation of dynamic property IXR_Message::$currentTag is deprecated
}}}
Follow-up to [1346].
Props bjorsch, kraftbj, jrf, mukesh27, SergeyBiryukov.
See #56790.
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There are a handful of places where we don't check that the XML functions exist before we use them. Ubuntu's PHP 7 packages don't include PHP-XML by default, increasing the chance of this causing issues.
Props kraftbj, markoheijnen.
Fixes#37122.
Built from https://develop.svn.wordpress.org/trunk@38883
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Sergey Biryukov
Dion Hulse
Dominik Schilling
Gary Pendergast
Scott Taylor