Woo filter

<?php

/* #### Nieuw filter #### */
/* Filteren op gearchiveerde producten (back-end)*/
add_action( 'restrict_manage_posts', 'filter002_admin_posts_filter_restrict_manage_posts' );

function filter002_admin_posts_filter_restrict_manage_posts(){

$type = 'product';
if (isset($_GET['post_type'])) {
$type = $_GET['post_type'];
}

if ('product' == $type){
$values = array(
'Zichtbaar' => 'visible',
'Gearchiveerd' => 'hidden',
);
?>
<select name="Stock">
<option value=""><?php _e('Archief', 'filter002'); ?></option>
<?php
$current_v = isset($_GET['Stock'])? $_GET['Stock']:'';
foreach ($values as $label => $value) {
printf
(
'<option value="%s"%s>%s</option>',
$value,
$value == $current_v? ' selected="selected"':'',
$label
);
}
?>
</select>
<?php
}
}

add_filter( 'parse_query', 'filter002_posts_filter' );

function filter002_posts_filter( $query ){
global $pagenow;
$type = 'product';
if (isset($_GET['post_type'])) {
$type = $_GET['post_type'];
}
if ( 'product' == $type && is_admin() && $pagenow=='edit.php' && isset($_GET['Stock']) && $_GET['Stock'] != '') {
$query->query_vars['meta_key'] = '_visibility';
$query->query_vars['meta_value'] = $_GET['Stock'];
}
}
/* #### Nieuw filter #### */
/* Add In/Out of Stock Filter to Admin *aanvulling op WooCommerce Sort By Stock* */
add_action( 'restrict_manage_posts', 'filter001_admin_posts_filter_restrict_manage_posts' );

function filter001_admin_posts_filter_restrict_manage_posts(){

$type = 'product';
if (isset($_GET['post_type'])) {
$type = $_GET['post_type'];
}

if ('product' == $type){
//change this to the list of values you want to show
//in 'label' => 'value' format
$values = array(
'Uitverkocht' => 'outofstock',
'Op voorraad' => 'instock',
);
?>
<select name="Stock">
<option value=""><?php _e('Voorraad', 'filter001'); ?></option>
<?php
$current_v = isset($_GET['Stock'])? $_GET['Stock']:'';
foreach ($values as $label => $value) {
printf
(
'<option value="%s"%s>%s</option>',
$value,
$value == $current_v? ' selected="selected"':'',
$label
);
}
?>
</select>
<?php
}
}
add_filter( 'parse_query', 'filter001_posts_filter' );

function filter001_posts_filter( $query ){
global $pagenow;
$type = 'product';
if (isset($_GET['post_type'])) {
$type = $_GET['post_type'];
}
if ( 'product' == $type && is_admin() && $pagenow=='edit.php' && isset($_GET['Stock']) && $_GET['Stock'] != '') {
$query->query_vars['meta_key'] = '_stock_status';
$query->query_vars['meta_value'] = $_GET['Stock'];
}
}