Notice : Function WP_Object_Cache::get was called incorrectly

  • wjh

    (@wjh)


    2 years, 5 months ago

    Hello!

    • WP 6.1.1 (Multisite)
    • EM 6.1.4
    • PHP 7.4.3x

    After recently updating WordPress from v6.0 to v6.1.1 (the latest version as of this post), the following error notice displays on all pages showing a list of events:

    Notice: Function WP_Object_Cache::get was called incorrectly. Cache key must be integer or non-empty string, NULL given. Please see Debugging in WordPress for more information. (This message was added in version 6.1.0.) in .../wp-includes/functions.php on line 5835

    A notice shows for each event in the list, so for example 10 events = 10 error messages.

    This is of course not a critical error; the events list displays and functions correctly. But I’d just thought you might like a heads-up 🙂

    One can currently see this error displaying on these 2 websites using Events Manager on WP 6.1+ and PHP 7.4+: Example 1 and Example 2 [NOT my sites; found via search engine]

    Something to fix for a future release perhaps?

    Cheers 🙂

Viewing 6 replies - 1 through 6 (of 6 total)
  • Thorsten Schraut

    (@hyperbrand)

    2 years, 5 months ago

    Hi, I have exactly the same problem with the list view. Same set up: WP 6.1.1 and PHP 7.4. The calendar view works fine.

    Best,
    Thorsten

    Thread Starter wjh

    (@wjh)

    2 years, 5 months ago

    Thanks @hyperbrand.

    FYI just updated to EM 6.1.5; unfortunately this error notice still shows for event lists.

    Maybe it will be fixed with the next release? One can only hope 🙂

    Thorsten Schraut

    (@hyperbrand)

    2 years, 5 months ago

    
[01-Dec-2022 18:34:34 UTC] PHP Notice:  Trying to get property 'post_type' of non-object in /wp-content/plugins/events-manager/classes/em-event-post.php on line 111
[01-Dec-2022 18:34:36 UTC] PHP Notice:  Die Funktion WP_Object_Cache::get wurde <strong>fehlerhaft</strong> aufgerufen. Der Cache-Schlüssel muss eine Ganzzahl oder eine nicht leere Zeichenfolge sein, NULL ist der vorgegebene Typ. Weitere Informationen: <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress (engl.)</a>. (Diese Meldung wurde in Version 6.1.0 hinzugefügt.) in /wp-includes/functions.php on line 5835
[01-Dec-2022 18:34:36 UTC] PHP Notice:  Die Funktion WP_Object_Cache::set wurde <strong>fehlerhaft</strong> aufgerufen. Der Cache-Schlüssel muss eine Ganzzahl oder eine nicht leere Zeichenfolge sein, NULL ist der vorgegebene Typ. Weitere Informationen: <a href="https://wordpress.org/support/article/debugging-in-wordpress/">Debugging in WordPress (engl.)</a>. (Diese Meldung wurde in Version 6.1.0 hinzugefügt.) in /wp-includes/functions.php on line 5835
    Thread Starter wjh

    (@wjh)

    2 years, 4 months ago

    FYI just updated to EM 6.1.6; unfortunately this error notice still shows for event lists.

    Any plans on fixing this soon?

    Cheers

    jamuel

    (@jamuel)

    2 years, 2 months ago

    For what it’s worth I don’t see this message when logged into my site. Only if I’m a public/guest accessing the site.

    jayharland

    (@jayharland)

    2 years, 1 month ago

    I was experiencing the same thing and I believe I have found the culprit.

    The notice is pretty clear whats happening (though it does a poor job saying where it happened) and so I searched the plugin code for instances of wp_cache_get and wp_cache_set. I then looked at what values were being passed as the key.

    Low and behold, in em-taxonomy-term.php on line 118, inside of a function named get_color(), wp_cache_get and wp_cache_set are utilized with the term_id as the key if color is not set. This was the problem for me as some of my events had no category and thus no term_id!

    In em-taxonomy-term.php I added an additional check for get_color():

    if( empty($this->color) && !empty($this->term_id))

    This cleared up the notices for me, though I bet that just ensuring all events had a category would also do the trick. I hope this helps!

    • This reply was modified 2 years, 1 month ago by jayharland.
Viewing 6 replies - 1 through 6 (of 6 total)
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