[wp-trac] [WordPress Trac] #63501: wp_iframe sends output before send_headers hook causing PHP headers sent notice

[WordPress Trac]

#63501: wp_iframe sends output before send_headers hook causing PHP headers sent
notice
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 Reporter:  kkmuffme      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Media         |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by kkmuffme):

 I don't know how exactly our users got to that page - I just got tons of
 PHP notices in Sentry, which is why I reported it. What I do know is that
 that link exists in HTML directly and is not an URL that is
 added/generated dynamically with JS.

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Ticket URL: <https://core.trac.wordpress.org/ticket/63501#comment:3>
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