[wp-trac] [WordPress Trac] #52874: Activating plugins on Install page randomly errors with "The plugin does not have a valid header" message.

[WordPress Trac]

#52874: Activating plugins on Install page randomly errors with "The plugin does
not have a valid header" message.
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 Reporter:  danieliser    |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Plugins       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:  administration
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Comment (by siliconforks):

 It seems that this issue occurs when a plugin contains multiple files with
 the `Plugin Name:` header.  The Content Control and Zapier plugins both
 contain a `trunk` directory which seems to be a nested copy of the entire
 plugin; presumably this is not intentional and was likely caused by some
 Subversion-related glitch.  The W3 Total Cache plugin contains an
 `extension-example` directory which contains a plugin apparently written
 as example code; this is presumably intentional, but it still seems to be
 an issue with W3 Total Cache rather than WordPress itself.  Note that the
 [https://developer.wordpress.org/plugins/plugin-basics/#getting-started
 Plugin Handbook] specifically mentions that only one file in a plugin is
 allowed to have the plugin header comment.

 There might still be an issue in WordPress here; at least, the error
 message seems misleading (the problem isn't that the plugin does not have
 a valid header - the problem is that the plugin contains two different
 files with valid headers).

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Ticket URL: <https://core.trac.wordpress.org/ticket/52874#comment:3>
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