As time varies, WordPress needs to allow for a nonce generated at 10:01 AM to be valid at 10:02 AM. It does this by using a time “tick” instead of the actual time, which is generated in two steps: First divide the lifespan of a nonce, in seconds, by two Divide the Unix timestamp by … Read more
This depends on what is it that you are trying to do/use. In theory the protocol used to communicate with memcached server is not very complex and can be implemented in PHP, and therefor as a plugin. In practice you might want to prevent collisions of multiple processes writing at the same time to the … Read more
The images not being loaded are prefixed with the domain https://i2.wp.com This is the CDN used when you activate the PHOTON module in the Jetpack Plugin. If you deactivate the PHOTON module or deactivate the Jetpack Plugin, you should be rid of the issue.
User gmazzap has a good explanation of Object Cache you may want to read over. If we take a look at get_terms() we can see it creates a new WP_Term_Query() and that classes get_terms() is where the potential caching happens. Line 666 specifically. Just a little further down we can see if it test if … Read more
The reason it’s only storing the first post data is because you’re using the same transient name for each post. If you want to store multiple movie transients, you need unique names for each movie. Also, the way you’re getting the transient defeats the purpose of using transients. You want to first try to get … Read more
You are most likely using browser caching ? Therefore new visitors would see the newly published post just fine, but because you’ve previously visited the page its cached and therefore your browser cache hasnt expired. Generally its good practice to clear all caches upon publishing posts/pages and/or activating or deactivating a plugin. You can also … Read more
In the class WP_Query, there is a hook posts_pre_query wich allow to set the result of a query before the DB call https://core.trac.wordpress.org/browser/tags/4.7.3/src/wp-includes/class-wp-query.php#L2755
It will most likely depend on the plugin, but you should also remember that your content might be cached also in caching proxies as well. https://stackoverflow.com/questions/9334393/proxy-cacheing-what-about-cookies In other words, if your output is different to two different users, than you can not use caching. The way to go around this is to make the decision … Read more
Since you mentioned that this is only happening on certain environments then a possible cause could be that those servers do not have the proper PHP extensions installed to handle parsing XML. Here’s a great Stack Exchange answer that outlines most (if not all) of the required extensions. Specifically, I would confirm whether or not … Read more
WP_Query has a Caching Parameters you can configure to return the desired data with/without caching. $swp_args = array( // Show posts without adding post meta information to the cache. ‘update_post_meta_cache’ => false, … ); In your specific case update_post_meta_cache allows you to turn on/off the caching for post meta.