Events

fpOnFieldFilter

Parameter	Description
name	The name of the field being filtered. This identifies which field the filter applies to.
operator	A reference to the operator being used for the filter (e.g., =, !=, FIND_IN_SET). It can be modified by event listeners.
value	A reference to the value being used for filtering. This can be modified by event listeners to change the filtering criteria dynamically.

Example

if ($modx->event->name === 'fpOnFieldFilter' && $name === 'categories') {
    $modx->event->params['operator'] = 'FIND_IN_SET';
    if (!is_array($value)) {
        $modx->event->params['value'] = [$value];
    }
}