[wp-trac] [WordPress Trac] #39759: Make $thumbnail_id filterable in embed-content.php

[WordPress Trac]

#39759: Make $thumbnail_id filterable in embed-content.php
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 Reporter:  Ov3rfly                              |       Owner:  ketuchetan
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  4.8.1
Component:  Embeds                               |     Version:  4.4
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch good-first-bug needs-      |     Focuses:
  testing                                        |
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Comment (by mariusvetrici):

 I applied the patch to the latest WordPress build, but the "embed-
 content.php" file doesn't get called if I embed a post in an iframe. So
 I'm not able to test how this works.

 Repro:
 1. in the root of the WordPress, create a simple HTML file with an IFRAME
 which includes an existing post. Let's say test.html
 2. load http://src.wordpress-develop.dev/test.html -> it displays ok in
 browser, but the embed-content.php file doesn't get called.

 Expected behavior: embed-content.php should get called when the IFRAME is
 loaded in a browser.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39759#comment:12>
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