[wp-trac] [WordPress Trac] #58905: Ensure locate_template only loads theme files

[WordPress Trac]

#58905: Ensure locate_template only loads theme files
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 Reporter:  jorbin           |       Owner:  (none)
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  6.4
Component:  Themes           |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  has-patch early  |     Focuses:
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Comment (by joemcgill):

 Thanks @jorbin. The use of `realpath()` in this diff can have a measurable
 negative performance impact. Given that this function has assumed that the
 template names were being concatenated directly with the various constants
 previously, I wonder if we could use `validate_file()` instead here and
 avoid the multiple calls to `realpath()`?

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Ticket URL: <https://core.trac.wordpress.org/ticket/58905#comment:1>
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