function thb_array_depth($array)
{
$max_depth = 1;
if (!is_array($array)) {
return $max_depth;
}
foreach ($array as $value) {
if (is_array($value)) {
$depth = thb_array_depth($value) + 1;
if ($depth > $max_depth) {
$max_depth = $depth;
}
}
}
return $max_depth;
}
/**
* Pre-render the field.
*
* @return void
*/
protected function preRender()
{
$options = array();
if ($this->dynamicOptions) {
if (is_array($this->dynamicOptions)) {
foreach (array_keys($this->dynamicOptions) as $key) {
if (is_callable($this->dynamicOptions[$key])) {
$options[$key] = call_user_func($this->dynamicOptions[$key]);
}
}
} else {
if (is_callable($this->dynamicOptions)) {
$options = call_user_func($this->dynamicOptions);
}
}
}
$depth = thb_array_depth($options);
if ($depth == 2) {
foreach ((array) $options as $optgroup => $values) {
$this->addOptionsGroup($optgroup, $values);
}
} else {
foreach ((array) $options as $value => $label) {
$this->addOption($value, $label);
}
}
if ($this->invisibleIfEmpty && count($this->_data['field_options']) <= 1) {
$this->addClass('invisible');
}
parent::preRender();
}
