PHP Warning: array_merge(): Expected parameter 1 to be an array, null given

Hi!

That message is definitely coming from one of your snippets – one of the ones which is activated. I can’t give you the name of the one causing the problem, but I can tell you it’ll be the one with array_merge on line 28 of its code.

To narrow the list down, you can search for the text array_merge in the snippet search box.

Figured it out. Bad array_merge funtion in one of the code snippets I added.

Good to hear that it’s sorted!

Thanks for the quick reply. I have figured out it is the code to add a new report to the ORDERS tab.

Here is the code that is causing the issue.

add_filter( ‘woocommerce_admin_reports’, ‘bbloomer_admin_add_report_orders_tab’ );

function bbloomer_admin_add_report_orders_tab( $reports )
{

$tab_array = array(
‘sales_by_state’ => array(
‘title’ => ‘Sales by State via snippet’,
‘description’ => ”,
‘hide_title’ => true,
‘callback’ => ‘bbloomer_yearly_sales_by_state’),
);
$reports[‘orders’][‘reports’] = array_merge($reports[‘orders’][‘reports’],$tab_array);

return $reports;
}

For the life on me, I can’t figure out why the array_merge is failing…any thoughts would be greatly appreciated!

-Georg

It’s possible that sometimes the $reports['orders'] variable is empty, or $reports['orders']['reports'] is set to a different value.

You should be able to fix this by adding a line to check whether that element is set and an array near the top of the function, and exit the function if so:

if ( ! isset( $reports['orders']['reports'] ) || ! is_array( $reports['orders']['reports'] ) return;

Thank you, Shea! That did the trick.