[wp-trac] [WordPress Trac] #43608: Display missing module error for GD when on Media Settings

[WordPress Trac]

#43608: Display missing module error for GD when on Media Settings
------------------------------+-----------------------------
 Reporter:  simonrcodrington  |      Owner:
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  Awaiting Review
Component:  Media             |    Version:  4.6
 Severity:  normal            |   Keywords:
  Focuses:  administration    |
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 When WordPress is installed on a server is
 [http://php.net/manual/en/book.image.php missing the GD PHP image
 library], there should be an admin level warning displayed on the Media
 Settings admin page.

 Without the GD module there will be '''no intermediate image sizes created
 when images are uploaded in the media library''' (the media gallery just
 uses the full image size by default)

 [https://pasteboard.co/Hd2hc9L.jpg Without Admin Notice]

 The Media Settings page should display an admin warning / error that tells
 the user that they're missing that module and without it no intermediate
 images will be created. The whole page talks about the various images size
 and without GD none of these settings will be used for anything.

 I've created a simple gist that displays an admin notice if the '''GD
 library isn't loaded''' and the current user is on the '''Media
 Settings''' page.

 [https://pasteboard.co/Hd2hVdk.jpg With Admin Level Notice]

 [https://gist.github.com/simonrcodrington/be60b6daae0b966a559878c4ba16d9d0]

 This has come up a few times now where images haven't been created in the
 media library and no one has known why. Sometimes hosting providers don't
 include this extension or they are just not loaded. Having an admin level
 notice here would make sense.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43608>
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