Add In/Out of Stock Filter to WordPress Admin

Brett Popoleo · November 10, 2016 at 11:34 am

Add In/Out of Stock Filter to WordPress Admin

By Brett Popoleo functions.php, WooCommerce, wordpress 4 Comments

Here is a custom WordPress/Woocommerce Function that adds a In/Out of Stock Filter to WordPress Admin.

<?php 
/* Add In/Out of Stock Filter to Admin */
add_action( 'restrict_manage_posts', 'wpse45436_admin_posts_filter_restrict_manage_posts' );

function wpse45436_admin_posts_filter_restrict_manage_posts(){

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

    //only add filter to post type you want
    if ('product' == $type){
        //change this to the list of values you want to show
        //in 'label' => 'value' format
        $values = array(
            'Out of Stock' => 'outofstock', 
            'In Stock' => 'instock',
        );
        ?>
        <select name="Stock">
        <option value=""><?php _e('Show All Stock', 'wpse45436'); ?></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', 'wpse45436_posts_filter' );

function wpse45436_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'];
    }
}

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<?php

/* Add In/Out of Stock Filter to Admin */

add_action( 'restrict_manage_posts', 'wpse45436_admin_posts_filter_restrict_manage_posts' );

function wpse45436_admin_posts_filter_restrict_manage_posts(){

$type = 'product';

if (isset($_GET['post_type'])) {

$type = $_GET['post_type'];

}

//only add filter to post type you want

if ('product' == $type){

//change this to the list of values you want to show

//in 'label' => 'value' format

$values = array(

'Out of Stock' => 'outofstock',

'In Stock' => 'instock',

);

?>

<?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', 'wpse45436_posts_filter' );

function wpse45436_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'];

}

SOURCE

Add In/Out of Stock Filter to WordPress Admin