select.php

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<?php
$vars['class'] = (array) elgg_extract('class', $vars, []);
$vars['class'][] = 'elgg-input-dropdown';
 
$defaults = array(
    'disabled' => false,
    'value' => '',
    'options_values' => array(),
    'options' => array(),
);
 
$vars = array_merge($defaults, $vars);
 
$options_values = $vars['options_values'];
unset($vars['options_values']);
 
$options = $vars['options'];
unset($vars['options']);
 
$value = is_array($vars['value']) ? $vars['value'] : array($vars['value']);
$value = array_map('strval', $value);
unset($vars['value']);
 
$vars['multiple'] = !empty($vars['multiple']);
 
// Add trailing [] to name if multiple is enabled to allow the form to send multiple values
if ($vars['multiple'] && !empty($vars['name']) && is_string($vars['name'])) {
    if (substr($vars['name'], -2) != '[]') {
        $vars['name'] = $vars['name'] . '[]';
    }
}
 
$options_list = '';
 
if ($options_values) {
    foreach ($options_values as $opt_value => $option) {
 
        $option_attrs = array(
            'value' => $opt_value,
            'selected' => in_array((string)$opt_value, $value),
        );
 
        $options_list .= elgg_format_element('option', $option_attrs, $option);
    }
} else {
    if (is_array($options)) {
        foreach ($options as $option) {
 
            $option_attrs = ['selected' => in_array((string)$option, $value)];
 
            $options_list .= elgg_format_element('option', $option_attrs, $option);
        }
    }
}
 
echo elgg_format_element('select', $vars, $options_list);