I am trying to get data from my database to export to a XML or CSV File by using a custom query. This is my function with the query :

function get_workhours($ID){
    $sql = $wpdb->prepare("SELECT worked_hours FROM db_info WHERE job_id = $ID");
    $data = $wpdb->query($sql);
        return "0";
        return $data;
} ?>

And in my custom export field i have this :


And when I try to preview this it gives me the error :

An unknown error occured.

Suggestions for a better idea for this problem are very welcome aswell.

Thanks in advance,

EDIT : I am using the WP All Export Pro Plugin. When adding a field to export I choose the option : Custom export field.

  • 1
    What is 'custom export field'? – Max Yudin Mar 6 '19 at 10:06

I think your syntax is wrong. It should be [get_workhours({ID})]. Also press "Save Functions" button before previewing.

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