checkboxes.php

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<?php
$defaults = array(
    'align' => 'vertical',
    'value' => array(),
    'default' => 0,
    'disabled' => false,
    'options' => array(),
    'name' => '',
);

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

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

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

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

$input_vars = $vars;
$input_vars['default'] = false;
if ($vars['name']) {
    $input_vars['name'] = "{$vars['name']}[]";
}
unset($input_vars['align']);
unset($input_vars['options']);

if (count($vars['options']) > 0) {
    // include a default value so if nothing is checked 0 will be passed.
    if ($vars['name'] && $vars['default'] !== false) {
        echo "<input type=\"hidden\" name=\"{$vars['name']}\" value=\"{$vars['default']}\" />";
    }

    echo "<ul class=\"$class\" $id>";
    foreach ($vars['options'] as $label => $value) {
        // @deprecated 1.8 Remove in 1.9
        if (is_integer($label)) {
            elgg_deprecated_notice('$vars[\'options\'] must be an associative array in input/checkboxes', 1.8);
            $label = $value;
        }

        $input_vars['checked'] = in_array(elgg_strtolower($value), $values);
        $input_vars['value'] = $value;
        $input_vars['label'] = $label;

        $input = elgg_view('input/checkbox', $input_vars);

        echo "<li>$input</li>";
    }
    echo '</ul>';
}