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Dynamically add message based on another field value

  • Hi,

    I am trying to dynamically populate a Message field based on another field in a Repeater.
    But I always get white screen with my code, the_row(): is added.
    The debug info says
    PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in /home/xxxx/webapps/xxx/wp-includes/class-wp-list-util.php on line 134

    This works:

    function cban_shortcode_disable_field($field) {
        $field['disabled'] = false;
        //$field['readonly'] = true;
        $field['message'] = 'ALMA';
        return $field;
    add_filter('acf/load_field/name=canb_shortcode', 'cban_shortcode_disable_field',20,1);

    But if I try to load the message dynamically I got white screen:

    add_filter('acf/load_field/name=canb_shortcode', 'canb_shortcode_load_field');
    function canb_shortcode_load_field($field){
        // if has rows
        if( have_rows('canb_notification_bars', 'option') ) :
            // while has rows
            while( have_rows('canb_notification_bars', 'option') ) : the_row();
                /* Get the name from the Notification bar name field */
                $canb_name = get_sub_field('canb_notification_bar_name','option');
                $canb_name = sanitize_title_with_dashes( $canb_name );
                $field['message'] = $canb_name;
    return $field;

    Can someone point me in the right direction?

    I have tried to use Example 2 from this page:

    I want to create a small plugin and in the message I would like to display a shortcode variable which the user can use to embed the notification bar.


  • remove ‘option’ from here

    $canb_name = get_sub_field('canb_notification_bar_name','option');

    should be

    $canb_name = get_sub_field('canb_notification_bar_name');

    I’m not sure that is causing your error, but that’s the only thing I can see wrong. For some reason your code is causing an infinite loop.

    Also, you should be using the acf/prepare_field hook to modify the field message. While acf/load_field can be used here it can have unintended side effects.

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