function validate($user_val)
{
$prefix = $this->group['prefix'];
$options = $this->group['options'];
# apply validation/sanitation filter(s) on the new values
# prefix-based filter
$user_val = apply_filters("kcv_settings_{$prefix}", $user_val);
if (empty($user_val)) {
return apply_filters('kc_psv', $user_val);
}
$nu_val = array();
foreach ($user_val as $section_id => $section_value) {
# section-based filter
$nu_val[$section_id] = apply_filters("kcv_setting_{$prefix}_{$section_id}", $section_value);
if (!isset($options[$section_id]['fields'])) {
continue;
}
foreach ($nu_val[$section_id] as $field_id => $field_value) {
$type = $options[$section_id]['fields'][$field_id]['type'];
# default sanitation
$field_value = _kc_sanitize_value($field_value, $type);
# type-based filter
$field_value = apply_filters("kcv_setting_{$prefix}_{$type}", $field_value);
# field-based filter
$field_value = apply_filters("kcv_setting_{$prefix}_{$section_id}_{$field_id}", $field_value);
# insert the filtered value to our new array
$nu_val[$section_id][$field_id] = $field_value;
}
}
return apply_filters("kc_psv", $nu_val);
}
/**
* Update posts & terms metadata
*
* @param string $meta_type post|term|user The type of metadata, post, term or user
* @param string $object_type_name The taxonomy or post type name
* @param int $object_id The ID of the object (post/term) that we're gonna update
* @param array $section The meta section array
* @param array $field The meta field array
*/
function _kc_update_meta($meta_type = 'post', $object_type_name, $object_id, $section, $field)
{
if (isset($_POST['action']) && $_POST['action'] == 'inline-save') {
return;
}
# Set the meta key and get the value based on the $meta_type and screen
switch ($meta_type) {
case 'post':
$meta_key = "_{$field['id']}";
$action = 'editpost';
break;
case 'term':
$meta_key = $field['id'];
$action = 'editedtag';
break;
case 'user':
$meta_key = $field['id'];
$action = 'update';
break;
}
# Current value
$db_val = get_metadata($meta_type, $object_id, $meta_key, true);
# Hold new value
$nu_val = '';
# Get the new meta value from user
if (isset($_POST["kc-{$meta_type}meta"][$section['id']][$field['id']])) {
$nu_val = $_POST["kc-{$meta_type}meta"][$section['id']][$field['id']];
if ($meta_type == 'post' && $object_type_name == 'nav_menu_item' && isset($nu_val[$object_id])) {
$nu_val = $nu_val[$object_id];
}
}
# default sanitation
$nu_val = _kc_sanitize_value($nu_val, $field['type']);
$filter_prefix = "kcv_{$meta_type}meta";
if ($meta_type != 'user' && $object_type_name != '') {
$filter_prefix .= "_{$object_type_name}";
}
# apply validation/sanitation filters on the new values
# 0. Taxonomy / Post type
$nu_val = apply_filters($filter_prefix, $nu_val, $section, $field);
# 1. Field type
$nu_val = apply_filters("{$filter_prefix}_{$field['type']}", $nu_val, $section, $field);
# 2. Section
$nu_val = apply_filters("{$filter_prefix}_{$section['id']}", $nu_val, $section, $field);
# 3. Field
$nu_val = apply_filters("{$filter_prefix}_{$section['id']}_{$field['id']}", $nu_val, $section, $field);
if (!$nu_val) {
delete_metadata($meta_type, $object_id, $meta_key);
} else {
update_metadata($meta_type, $object_id, $meta_key, $nu_val);
}
}