Overrides

Joomla 4 left menu

Select "System" from the left menu. 

Joomla 4 select "Site Templates"

Select the "Site Template" to go into the area for creating overrides of Joomla 4. 

What are the differences between "Site Templates" and "Site Template Styles"?

The difference between Site Templates and Site Template Styles is that the overrides for the Template that is put on the Site Templates place, here you put all your customization of the site. The Styles are set in the separate Site Template Styles, which you only use to change the site's primary colors and put things like a custom logo and the template's name.

This opens the place where you create the overrides. There is a selection called "Create Overrides"; go into it.

You will now come into the selection area where all your Modules, Components, Plugins, and Layout overrides are shown.

Select Plugins Fields Subform

Go to the "Editor" - Select the html  plg_field_subform subform.php

The default subform.php looks like this

<?php

/**
 * @package     Joomla.Plugin
 * @subpackage  Fields.Subform
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

use Joomla\Component\Fields\Administrator\Helper\FieldsHelper;

defined('_JEXEC') or die;

if (!$context || empty($field->subform_rows)) {
    return;
}

$result = '';

// Iterate over each row that we have
foreach ($field->subform_rows as $subform_row) {
    // Placeholder array to generate this rows output
    $row_output = array();

    // Iterate over each sub field inside of that row
    foreach ($subform_row as $subfield) {
        $class   = trim($subfield->params->get('render_class', ''));
        $layout  = trim($subfield->params->get('layout', 'render'));
        $content = trim(
            FieldsHelper::render(
                $context,
                'field.' . $layout, // normally just 'field.render'
                array('field' => $subfield)
            )
        );

        // Skip empty output
        if ($content === '') {
            continue;
        }

        // Generate the output for this sub field and row
        $row_output[] = '<span class="field-entry' . ($class ? (' ' . $class) : '') . '">' . $content . '</span>';
    }

    // Skip empty rows
    if (count($row_output) == 0) {
        continue;
    }

    $result .= '<li>' . implode(', ', $row_output) . '</li>';
}
?>

<?php if (trim($result) != '') : ?>
    <ul class="fields-container">
        <?php echo $result; ?>
    </ul>
<?php endif; ?>

With:

On lines 52 and 56

<?php

/**
 * @package     Joomla.Plugin
 * @subpackage  Fields.Subform
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

use Joomla\Component\Fields\Administrator\Helper\FieldsHelper;

defined('_JEXEC') or die;

if (!$context || empty($field->subform_rows)) {
    return;
}

$result = '';

// Iterate over each row that we have
foreach ($field->subform_rows as $subform_row) {
    // Placeholder array to generate this rows output
    $row_output = array();

    // Iterate over each sub field inside of that row
    foreach ($subform_row as $subfield) {
        $class   = trim($subfield->params->get('render_class', ''));
        $layout  = trim($subfield->params->get('layout', 'render'));
        $content = trim(
            FieldsHelper::render(
                $context,
                'field.' . $layout, // normally just 'field.render'
                array('field' => $subfield)
            )
        );

        // Skip empty output
        if ($content === '') {
            continue;
        }

        // Generate the output for this sub field and row
        $row_output[] = '<span class="field-entry' . ($class ? (' ' . $class) : '') . '">' . $content . '</span>';
    }

    // Skip empty rows
    if (count($row_output) == 0) {
        continue;
    }

    $result .= '<li class="list-group-item">' . implode(', ', $row_output) . '</li>';
}
?>

<?php if (trim($result) != '') : ?>
    <ul class="fields-container list-group">
        <?php echo $result; ?>
    </ul>
<?php endif; ?>