Access repeatable subform fields and display in article override

Question

I have been testing the following code to retrieve and output the values from a repeatable subform field with no success.

JLoader::register('FieldsHelper', JPATH_ADMINISTRATOR . '/components/com_fields/helpers/fields.php');
$context = 'com_content.article';
$article = $this->item;
$fields = FieldsHelper::getFields($context, $article, true);

foreach($fields as $field) {
    $fields[$field->name] = $field;
}

$programFields = json_decode($fields['programs']);

The $programs field is the repeatable field with three sub fields attached to it. When I var_dump $programFields, the following error is displayed. Warning: json_decode() expects parameter 1 to be string, object given.

If I var_dump `$fields['programs'], the following is outputted.

object(stdClass)[1473]
  public 'id' => string '16' (length=2)
  public 'title' => string 'Programs' (length=8)
  public 'name' => string 'programs' (length=8)
  public 'checked_out' => string '910' (length=3)
  public 'checked_out_time' => string '2020-03-17 18:15:15' (length=19)
  public 'note' => string '' (length=0)
  public 'state' => string '1' (length=1)
  public 'access' => string '1' (length=1)
  public 'created_time' => string '2020-02-21 14:55:50' (length=19)
  public 'created_user_id' => string '910' (length=3)
  public 'ordering' => string '0' (length=1)
  public 'language' => string '*' (length=1)
  public 'fieldparams' => 
    object(Joomla\Registry\Registry)[1344]
      protected 'data' => 
        object(stdClass)[1353]
          public 'fields' => 
            object(stdClass)[1348]
            ...
              protected 'initialized' => boolean true
              public 'separator' => string '.' (length=1)
              public 'params' => 
                object(Joomla\Registry\Registry)[1346]
                  protected 'data' => 
                  object(stdClass)[1355]
                    public 'hint' => string '' (length=0)
                    public 'class' => string '' (length=0)
                    public 'label_class' => string '' (length=0)
                    public 'show_on' => string '' (length=0)
                    public 'render_class' => string '' (length=0)
                    public 'showlabel' => string '0' (length=1)
                    public 'label_render_class' => string '' (length=0)
                    public 'display' => string '0' (length=1)
                    public 'layout' => string '' (length=0)
                    public 'display_readonly' => string '2' (length=1)
                    protected 'initialized' => boolean true
                    public 'separator' => string '.' (length=1)
                    public 'type' => string 'repeatable' (length=10)
                    public 'default_value' => string '' (length=0)
                    public 'context' => string 'com_content.article' (length=19)
                    public 'group_id' => string '0' (length=1)
                    public 'label' => string 'Programs' (length=8)
                    public 'description' => string '' (length=0)
                    public 'required' => string '0' (length=1)
                    public 'language_title' => null
                    public 'language_image' => null
                    public 'editor' => string 'Mike Hermary' (length=12)
                    public 'access_level' => string 'Public' (length=6)
                    public 'author_name' => string 'Mike Hermary' (length=12)
                    public 'group_title' => null
                    public 'group_access' => null
                    public 'group_state' => null
                    public 'group_note' => null
                    public 'value' => string '{"programs0":{"Image":"","Title":"Preschool to Grade 1\/2","Sypnosis":"<h4>Sypnosis<\/h4>\r\n<p>We introduce the children to the concept of wildlife rehabilitation and the differences between wild and domestic animals. We use storytelling, pictures and one or more of our education animals. The children learn how every one of them can make a difference to help wildlife.<\/p>","Duration":"30 to 40 minutes","Class Size":"Min - 12, Max - 30"},"programs1":{"Image":"","Title":"Grades 2\/3 - 6","Sypnosis":"<h4>Syp'... (length=2335)
                    public 'rawvalue' => string '{"programs0":{"Image":"","Title":"Preschool to Grade 1\/2","Sypnosis":"<h4>Sypnosis<\/h4>\r\n<p>We introduce the children to the concept of wildlife rehabilitation and the differences between wild and domestic animals. We use storytelling, pictures and one or more of our education animals. The children learn how every one of them can make a difference to help wildlife.<\/p>","Duration":"30 to 40 minutes","Class Size":"Min - 12, Max - 30"},"programs1":{"Image":"","Title":"Grades 2\/3 - 6","Sypnosis":"<h4>Syp'... (length=2335)

The programs repeatable field has the following stored in it's fieldparams table column:

{"fields":{"fields0":{"fieldname":"Image","fieldtype":"media","fieldfilter":"0"},"fields1":{"fieldname":"Title","fieldtype":"text","fieldfilter":"JComponentHelper::filterText"},"fields2":{"fieldname":"Sypnosis","fieldtype":"editor","fieldfilter":"safehtml"},"fields3":{"fieldname":"Duration","fieldtype":"text","fieldfilter":"JComponentHelper::filterText"},"fields4":{"fieldname":"Class Size","fieldtype":"text","fieldfilter":"JComponentHelper::filterText"}}}

Repeatable Field plugin override code

$fieldValue = $field->value;
echo $fieldValue;

Updated tested code

$programFields = json_decode($fields['programs']->rawvalue);
echo $programFields->Title;

The following error is displayed from this code: Notice: Undefined property: stdClass::$Title.

How would I output the individual repeating fields?

Could someone explain why this issue is occurring? All other custom fields are functioning correctly.

Answer 1

$fields['programs'] is already an object. Run json_decode() only on its value.

$programFields = json_decode($fields['programs']->rawvalue);

Answer 2

Here is the code that finally worked for me. Thanks to @Sharky for the tips. Hopefully it is helpful to others.

Example working code

<?php
$programs = json_decode($fields['programs']->rawvalue);
$class = $fields['programs']->params->get('render_class');
?>
<div class="programs">
<?php foreach($programs as $program): ?>
    <div class="program <?php echo $class; ?>">
        <?php if(isset($program->Image) && !empty($program->Image)): ?>
            <div class="program__image">
                <?php echo $program->Image; ?>
            </div>
        <?php endif; ?>
        <?php if(isset($program->Title) && !empty($program->Title)): ?>
            <h3 class="program__title">
                <?php echo $program->Title; ?>
            </h3>
        <?php endif; ?>
        <?php if(isset($program->Sypnosis) && !empty($program->Sypnosis)): ?>
            <?php echo $program->Sypnosis; ?>
        <?php endif; ?>
        <div class="program__meta">
            <ul>
                <?php if(isset($program->Duration) && !empty($program->Duration)): ?>
                    <li>
                        <strong><?php echo JText::_('MRWC_PROGRAM_DURATION_TITLE'); ?></strong>
                        <?php echo $program->Duration; ?>
                    </li>
                <?php endif; ?>
                <?php if(isset($program->Size) && !empty($program->Size)) : ?>
                    <li>
                        <strong><?php echo JText::_('MRWC_PROGRAM_CLASS_SIZE_TITLE'); ?></strong>
                        <?php echo $program->Size; ?>
                    </li>
                <?php endif; ?>
                <?php if((isset($program->Duration) && !empty($program->Duration)) || (isset($program->Size) && !empty($program->Size))): ?>
                    <li>
                        <a href="mailto:[email protected]?subject=Booking for <?php echo $program->Title; ?> Program"><?php echo JText::_('MRWC_PROGRAM_BOOK_LABEL'); ?></a>
                    </li>
                <?php endif; ?>
            </ul>
        </div>
    </div>
<?php endforeach; ?>