fieldset.php

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<?php

$vars['class'] = elgg_extract_class($vars, [
    'elgg-fieldset',
    'clearfix',
]);

$align = elgg_extract('align', $vars, 'vertical');
unset($vars['align']);
$vars['class'][] = "elgg-fieldset-$align";

$justify = elgg_extract('justify', $vars, '');
unset($vars['justify']);
if ($justify) {
    $vars['class'][] = "elgg-justify-$justify";
}

$legend = elgg_extract('legend', $vars);
unset($vars['legend']);

$fields = (array) elgg_extract('fields', $vars, []);
unset($vars['fields']);

$fieldset = '';
if ($legend) {
    $vars['class'][] = 'elgg-fieldset-has-legend';
    $fieldset .= elgg_format_element('legend', [], $legend);
}

foreach ($fields as $field) {
    $fieldset .= elgg_view_field($field);
}

echo elgg_format_element('fieldset', $vars, $fieldset);