id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
22232	Setting Transient Expiration to 0 Causes Transient To Never Expire	cgrymala		"I realize this may be by design, but the way the `set_transient()` function handles expiration timeouts that are set to 0 is a little counter-intuitive.

Logically, it seems like setting a transient's expiration to 0 would cause the transient to expire immediately (essentially, you wouldn't even set the transient). However, in reality, setting the expiration to 0 actually causes the transient to never expire (like a standard option, just with the _transient_ prefix on the option name). The biggest issue with the way it's currently handled is the fact that those transients also auto-load; so an unsuspecting developer could easily start to fill up the memory buffer with auto-loading transients that should logically have never been set.

This issue may become even more important now that the concept of filtering a transient's expiration has been introduced (http://core.trac.wordpress.org/ticket/21330).

I would propose simply exiting the function without storing the transient if the `$expiration` parameter is empty."	enhancement	closed	normal		Cache	2.8	normal	invalid