PHP Fatal error: Uncaught Error: Call to a member function atp_variable() on null

Question

hello i have the next error in an admin option and the line of code is the next one. can you please help me ?

[11-Sep-2021 12:02:43 UTC] PHP Fatal error: Uncaught Error: Call to a member function atp_variable() on null in /var/www/vhosts//theme-options.php:858 Stack trace: #0 /var/www/vhosts/insect.gr/httpdocs/wp-includes/class-wp-hook.php(303): atp_options() #1 /var/www/vhosts/insect.gr/httpdocs/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters() #2 /var/www/vhosts/insect.gr/httpdocs/wp-includes/plugin.php(470): WP_Hook->do_action() #3 /var/www/vhosts/insect.gr/httpdocs/wp-settings.php(578): do_action() #4 /usr/local/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1291): require('/var/www/vhosts...') #5 /usr/local/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1212): WP_CLI\Runner->load_wordpress() #6 /usr/local/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(23): WP_CLI\Runner->start() #7 /usr/local/psa/admin/plib/modules/wp-toolkit/vendor/wp-cli/ve in /var/www/vhosts//theme-options.php on line 858

        $iva_of_options[] = array(
        'name'    => 'Select Slider Type',
        'desc'    => 'Select which slider you want to use for the Frontpage of the theme.',
        'id'      => $shortname . '_slider',
        'std'     => 'flexslider',
        'class'   => 'select300',
        'type'    => 'select',
        'options' => $atp_theme->atp_variable( 'slider_type' ),
    );

the whole code is here codeshare.io/zyXYA7

Answer 1

The error message in your question appears to have been thrown from WP CLI. Based on your other comments the problem is that your theme is not properly declaring a global variable.

Somewhere in your code you have this declared outside a function:

$atp_theme = new ATP_theme();

Then in other parts of your code you have:

global $atp_theme;

When using WordPress via the browser, variables declared outside a function, like $atp_theme in that first line, are global. So you can access them by using global, like in the second line.

The problem is that when using WP CLI, variables declared outside a function are not automatically global. Therefore global $atp_theme is undefined.

To solve this you need to explicitly declare the variable as global when defining it, like this:

global $atp_theme;

$atp_theme = new ATP_theme();

Or this would also work:

$GLOBALS['atp_theme'] = new ATP_theme();