functions tied to "init" action do not run

[dbvista]

We’re running WordPress 3.3.2. After upgrading BuddyPress to 1.5.5, some of the functions in our WordPress plugins have stopped running if they hook WordPress’s “init” action. For example, in this code:

error_log("one");
function foo() {
  error_log("two");
}
add_action("init", "foo");
error_log("three");

the strings “one” and “three” get written to the error log (proving that the PHP file is being loaded), but “two” never happens. This problem is also mentioned on StackOverflow:

​http://stackoverflow.com/questions/9895881/buddypress-wiki-component-action-on-init-not-called

[dbvista]

Previously we were running Version 1.2.8.

[boonebgorges]

The problem appears to be with the BuddyPress Wiki Component, and in particular with the way that this plugin loads itself. Its main loader function is hooked to bp_init, which is too late. It should be hooked to bp_include. See ​http://codex.buddypress.org/plugin-development/checking-buddypress-is-active/

You may consider contacting the author of the plugin, to see if he plans to update it for BP 1.5 compatibility.

[dbvista]

Thank you very much. We are not running BuddyPress Wiki, but our other plugins were also using bp_init.

[boonebgorges]

We are not running BuddyPress Wiki, but our other plugins were also using bp_init.

Yeah, a pretty fair number of plugins are. The truth is that using bp_init works fine in most cases - unless you *also* try to hook an internal function to init. (The reason is because bp_init is itself hooked to init at priority 10, which creates a race condition that the hooked function often loses.) This is one of the reasons why bp_include was introduced around BP 1.2.6.