radio.php

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<?php
$defaults = array(
    'align' => 'vertical',
    'value' => array(),
    'disabled' => false,
    'options' => array(),
    'name' => '',
);

$vars = array_merge($defaults, $vars);

$id = '';
if (isset($vars['id'])) {
    $id = "id=\"{$vars['id']}\"";
    unset($vars['id']);
}

$class = "elgg-input-radios elgg-{$vars['align']}";
if (isset($vars['class'])) {
    $class .= " {$vars['class']}";
    unset($vars['class']);
}
unset($vars['align']);
$vars['class'] = 'elgg-input-radio';

if (is_array($vars['value'])) {
    $vars['value'] = array_map('elgg_strtolower', $vars['value']);
} else {
    $vars['value'] = array(elgg_strtolower($vars['value']));
}

$options = $vars['options'];
unset($vars['options']);

$value = $vars['value'];
unset($vars['value']);

if ($options && count($options) > 0) {
    echo "<ul class=\"$class\" $id>";
    foreach ($options as $label => $option) {

        $vars['checked'] = in_array(elgg_strtolower($option), $value);
        $vars['value'] = $option;

        $attributes = elgg_format_attributes($vars);

        // handle indexed array where label is not specified
        // @deprecated 1.8 Remove in 1.9
        if (is_integer($label)) {
            elgg_deprecated_notice('$vars[\'options\'] must be an associative array in input/radio', 1.8);
            $label = $option;
        }

        echo "<li><label><input type=\"radio\" $attributes />$label</label></li>";
    }
    echo '</ul>';
}