PHP Strict Standards Warnings with Events Manager and PHP 5.4

since it’s only a warning message and not fatal error, you can try to turn-off php display_error and can I know what is your current WP version?

Thanks for the replay.

I’m using the latest version of WordPress, 3.8.1.

I already have display_errors set to “off,” thanks. The warnings are showing up in my error logs, which I don’t want to disable because I find them useful for debugging code. That’s how I caught these warnings. They do fill up the error logs. : )

What version of Events Manager are you using?

Events Manager 5.5.2.

Sorry, I should have put that in the initial post.

Can’t be 100% certain, but I’m pretty sure there’s a fix for this in the the Dev version (available under Events > Settings > General Settings > Admin Tools).

I only have Events Manager installed on a live site, so I’m a little worried about changing to the Dev version, but if there are just a few lines of code you want me to tweak to test it, I’m game. I could quickly reverse that if it blew up on me.

with regards to this warnings

[01-Mar-2014 01:47:21 UTC] PHP Strict Standards:  call_user_func_array() expects parameter 1 to be a valid callback, non-static method EM_Calendar::init() should not be called statically in /home/username/public_html/wp-includes/plugin.php on line 429

[01-Mar-2014 01:47:21 UTC] PHP Strict Standards:  Declaration of WPFC_EM_Categories_Walker::start_el() should be compatible with Walker::start_el(&$output, $object, $depth = 0, $args = Array, $current_object_id = 0) in /home/username/public_html/wp-content/plugins/events-manager/em-wpfc.php on line 294

– on second line above, you can directly go to that line and modify
– on first line above, you can check classes/em-calendar.php

I had some time this morning so I installed Events Manager 5.5.2 on a test site and upgraded it to the Dev version 5.5.2.1. Then I did a file comparison to see if these issues have been addressed in the current Dev version, but they have not. The only difference between /events-manager/em-wpfc.php in 5.5.2 and 5.5.2.1 is not associated with this issue, it’s associated with getting color options on line 181. The two versions of /classes/em-calendar.php are identical.

So, I took a look at /classes/em-caldendar.php, and the start_el function is declared like this:
function start_el(&$output, $category, $depth, $args) {
To make it compatible with Walker::start_el() as in the warning above, does that mean I would change it to look like this?:
function start_el(&$output, $category, $depth = 0, $args = Array, $current_object_id = 0) {

I’m not really sure about that one.

As for the init() function in /classes/em-calendar.php, it’s just an empty function in v. 5.5.2:

function init(){
		//nothing to init anymore
	}

So it looks like the fix for that warning would just be to call it statically:

public static function init(){
		//nothing to init anymore
	}