While using reserved PHP keywords as parameter name labels is allowed, in the context of function calls using named parameters in PHP 8.0+, this will easily lead to confusion. To avoid that, it is recommended not to use reserved keywords as function parameter names.
This commit renames the `$echo` parameter to `$verbose` in `WP_Filesystem_Base::find_base_dir()` and `::get_base_dir()`, and updates the documentation accordingly. This matches the class property of the same name.
Follow-up to [52946], [52996], [52997], [52998], [53003].
Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #55327.
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git-svn-id: http://core.svn.wordpress.org/trunk@52603 1a063a9b-81f0-0310-95a4-ce76da25c4cd