First observation while debugging: On sub-network-sites the entries in e.g. wp_10_postmeta have “{{unknown}}” as a value and there are no _oembed_time_* entries from this plugin
Update 2:
I echoed the variable $oembed_url in both cased and put it into my address bar
On the primary site the it returns “Octocat is lost, and afraid”, because I didn’t provide parameters
On the sub-sites the simply returns the normal website
Do both URLs contain the same value for the wpdotorg_oembed parameter? or different?
If they’re the same – does it match the value of the wpdotorg_oembed_key entry in the _options database table for the main network, or the subsite?
If they’re different do they match the value of wpdotorg_oembed_key entry in the _options database table for the relevant site?
Do both URLs contain the same value for the wpdotorg_oembed parameter? or different?
Different
If they’re different do they match the value of wpdotorg_oembed_key entry in the _options database table for the relevant site?
No, in both cases not… Maybe because I’m deleting meta_key all the time?
I think I’ve got problem: Here are var_dumps of $_GET for both cases:
http://example.com/?github_oembed=xxxxxxxx
array(1) { [“github_oembed”]=> string(32) “xxxxxxxxxx” }
http://example.com/subsite/?github_oembed=xxxxxxxxx
array(0) {}
I really don’t know why, but on the sub-site $_GET is empty, not matter what parameters I put behind the url. This leads to maybe_handle_oembed() returning false, so there is no oembend endpoint and nothings happens 🙁
Maybe you have to add your variable to WP_Query via https://codex.wordpress.org/Function_Reference/get_query_var ?
Yep, this seems to be the problem. Have a look here: http://stackoverflow.com/questions/1018935/get-and-wordpress
(Look at the answer with the most votes, not the one marked as right)
