Get variations IDs of variable product in WooCommerce

Db::getInstance()->executeS("DELETE FROM product_images WHERE id_product NOT IN (" . join($allProductIds,',') . ")")

// Get visible variations
$product = wc_get_product($product_id);
$variations = $product->get_available_variations();
$variations_id = wp_list_pluck( $variations, 'variation_id' );

// OR Get all varations regardless of visibility
$product = wc_get_product($product_id);
$current_products = $product->get_children();

add_filter( 'woocommerce_email_attachments', 'attach_downloadable_files_to_customer_completed_email', 10, 3 );
function attach_downloadable_files_to_customer_completed_email( $attachments, $email_id, $order ) {
    if( isset( $email_id ) && $email_id === 'customer_completed_order' ){
        // Loop through order items
        foreach( $order->get_items() as $item ) {
            $product = $item->get_product(); // The product Object

            if ( $product->is_downloadable() && ( $downloads = $product->get_downloads() ) ) {
                // Loop through product downloads
                foreach( $downloads as $download ) {
                    $attachments[] = $download->get_file();
                }
            }
        }
    }
    return $attachments;
}

function custom_price_shortcode_callback( $atts ) {

    $atts = shortcode_atts( array(
        'id' => null,
    ), $atts, 'product_price' );

    $html = '';

    if( intval( $atts['id'] ) > 0 && function_exists( 'wc_get_product' ) ){
        // Get an instance of the WC_Product object
        $product = wc_get_product( intval( $atts['id'] ) );

        // Get the product prices
        $price         = wc_get_price_to_display( $product, array( 'price' => $product->get_price() ) ); // Get the active price
        $regular_price = wc_get_price_to_display( $product, array( 'price' => $product->get_regular_price() ) ); // Get the regular price
        $sale_price    = wc_get_price_to_display( $product, array( 'price' => $product->get_sale_price() ) ); // Get the sale price

        // Your price CSS styles
        $style1 = 'style="font-size:40px;color:#e79a99;font-weight:bold;"';
        $style2 = 'style="font-size:25px;color:#e79a99"';

        // Formatting price settings (for the wc_price() function)
        $args = array(
            'ex_tax_label'       => false,
            'currency'           => 'EUR',
            'decimal_separator'  => '.',
            'thousand_separator' => ' ',
            'decimals'           => 2,
            'price_format'       => '%2$s %1$s',
        );

        // Formatting html output
        if( ! empty( $sale_price ) && $sale_price != 0 && $sale_price < $regular_price )
            $html = "<del $style2>" . wc_price( $regular_price, $args ) . "</del> <ins $style1>" . wc_price( $sale_price, $args ) . "</ins>"; // Sale price is set
        else
            $html = "<ins $style1>" . wc_price( $price, $args ) . "</ins>"; // No sale price set
    }
    return $html;
 }
 add_shortcode( 'product_price', 'custom_price_shortcode_callback' );

<?php

add_filter( 'woocommerce_product_data_tabs', 'b2b_add_user_product_per_user_tab' ); 
function b2b_add_user_product_per_user_tab( $tabs ) {
    $tabs['product-per-user'] = array( 
        'label' => __( 'Assign User', 'woocommerce' ), 
        'target' => 'product_per_user', 
        'class' => array( 'show_if_simple', 'show_if_variable' ), 
    ); 
    return $tabs; 
}

add_action('woocommerce_product_data_panels', 'b2b_product_per_user_panel');
function b2b_product_per_user_panel() {
    global $post;
    // Note the 'id' attribute needs to match the 'target' parameter set above
	?>
    <div id='product_per_user' class='panel woocommerce_options_panel'>
        <?php $redeemable_stores = (array) get_post_meta( $post->ID, '_redeem_in_stores', true );?>
        <p class='form-field _redeem_in_stores'>
            <label for='_redeem_in_stores'><?php _e( 'Redeemable in stores', 'woocommerce' ); ?></label>
            <select name='_redeem_in_stores[]' class='wc-enhanced-select' multiple='multiple' style='width: 80%;'>
                <option <?php selected( in_array( 'AL', $redeemable_stores ) ); ?> value='AL'>Alabama</option>
                <option <?php selected( in_array( 'NY', $redeemable_stores ) ); ?> value='NY'>New York</option>
                <option <?php selected( in_array( 'TX', $redeemable_stores ) ); ?> value='TX'>Texas</option>
                <option <?php selected( in_array( 'WY', $redeemable_stores ) ); ?> value='WY'>Wyoming</option>
            </select>
            <img class='help_tip' data-tip="<?php _e( 'Select the stores where this gift card is redeemable.', 'woocommerce' ); ?>" src='<?php echo esc_url( WC()->plugin_url() ); ?>/assets/images/help.png' height='16' width='16'>
        </p>
    </div>
    <?php
}

/**
 * Save the custom fields.
 */
function save_product_per_user_field( $post_id ) {
	if ( isset( $_POST['_redeem_in_stores'] ) ) :
		update_post_meta( $post_id, '_redeem_in_stores', (array) $_POST['_redeem_in_stores'] );
	endif;
}
add_action( 'woocommerce_process_product_meta_simple', 'save_product_per_user_field' );
add_action( 'woocommerce_process_product_meta_variable', 'save_product_per_user_field' );

<?php

$args = array(
  'role'    => 'customer',
  'orderby' => 'user_nicename',   
  'order'   => 'ASC'
);
$users = get_users( $args );

echo '<ul>';
foreach ( $users as $user ) {
	echo '<li>' . esc_html( $user->display_name ) . '[' . esc_html( $user->user_email ) . ']</li>';
}
echo '</ul>';

<?php

add_filter( 'woocommerce_product_query_meta_query', 'show_only_products_with_specific_metakey', 10, 2 );
function show_only_products_with_specific_metakey( $meta_query, $query ) {
    // Only on shop pages
    if( ! is_shop() ) return $meta_query;

    $meta_query[] = array(
        'key'     => '_allowed_user',
        'value'   => get_current_user_id(),
    );
    return $meta_query;
}

function b2b_redirect_if_product_is_not_for_user() {
    if ( is_product() ) {
        $allowed_user = get_post_meta( get_the_ID(), '_allowed_user', true );
        if ( $allowed_user != get_current_user_id() ) {
            wp_redirect( site_url( '/shop' ), 301 );
        }
    }
}

add_action('template_redirect', 'b2b_redirect_if_product_is_not_for_user');

<?php

/**
* Separate file
* Add a $is_oos_last variable before the woof shortcode then set it to false after the shortcode
*/
?>

<?php $is_oos_last = true; ?>
 <?php echo do_shortcode( '[woof_products per_page="12" columns="3" is_ajax="1"]' ); ?>
<?php $is_oos_last = false; ?>

<?php


/**
* functions.php
* Modify the query to push out of stock at the bottom of the list
*/
add_filter('posts_clauses', 'tbd_order_by_stock_status', 9999);
function tbd_order_by_stock_status($posts_clauses)
{
    global $wpdb;
    global $is_oos_last;

    if ($is_oos_last == 1 || $_GET['is_oos_last'] == 1 || is_woocommerce() && (is_shop() || is_product_category() || is_product_tag() )) {
        $posts_clauses['join'] .= " INNER JOIN $wpdb->postmeta istockstatus ON ($wpdb->posts.ID = istockstatus.post_id) ";
        $posts_clauses['orderby'] = " istockstatus.meta_value ASC, " . $posts_clauses['orderby'];
        $posts_clauses['where'] = " istockstatus.meta_key = '_stock_status' AND istockstatus.meta_value <> '' " . $posts_clauses['where'];
    }
    return $posts_clauses;
}
add_filter('woof_draw_products_get_args', 'tbd_woof_draw_products_get_args', 9999 );
function tbd_woof_draw_products_get_args( $args ) {
    $args['is_oos_last'] = 1;
    return $args;
}

<?php
/**
 * IMPORTANT!!!
 * Before anything else, make sure that you created a custom field for category and has a field called 'custom_order'
 * Then on each catogory, fill out the custom_order field.
 */

/**
* Separate file
* Add a $is_oos_last variable before the woof shortcode then set it to false after the shortcode
*/
?>

<?php $is_oos_last = true; ?>
 <?php echo do_shortcode( '[woof_products per_page="12" columns="3" is_ajax="1"]' ); ?>
<?php $is_oos_last = false; ?>

<?php
/**
* functions.php
* Modify the query to push out of stock at the bottom of the list
*/
add_filter('posts_clauses', 'tbd_order_by_stock_status', 9999);
function tbd_order_by_stock_status($posts_clauses)
{
    global $wpdb;
    global $is_oos_last;

    if ($is_oos_last == 1 || $_GET['is_oos_last'] == 1 || is_woocommerce() && (is_shop() || is_product_category() || is_product_tag() )) {
        $posts_clauses['join'] .= " INNER JOIN $wpdb->postmeta istockstatus ON ($wpdb->posts.ID = istockstatus.post_id) ";
        $posts_clauses['join'] .= " INNER JOIN {$wpdb->prefix}term_relationships term_rel ON {$wpdb->posts}.ID = term_rel.object_id INNER JOIN {$wpdb->prefix}termmeta termmeta1 ON termmeta1.term_id=term_rel.term_taxonomy_id ";
        $posts_clauses['orderby'] = " termmeta1.meta_value ASC, istockstatus.meta_value ASC, " . $posts_clauses['orderby'];
        $posts_clauses['where'] = " AND term_rel.term_taxonomy_id IN (SELECT term_id FROM {$wpdb->prefix}term_taxonomy WHERE taxonomy='product_cat') AND termmeta1.meta_key = 'custom_order' AND istockstatus.meta_key = '_stock_status' AND istockstatus.meta_value <> '' " . $posts_clauses['where'];
    }
    return $posts_clauses;
}
add_filter('woof_draw_products_get_args', 'tbd_woof_draw_products_get_args', 9999 );
function tbd_woof_draw_products_get_args( $args ) {
    $args['is_oos_last'] = 1;
    return $args;
}

sudo lsof -i:80; sudo lsof -tnP -i:80 | xargs -n 1 ps -p
kill <PID target>

add_filter( 'woocommerce_checkout_fields', 'alter_woocommerce_checkout_fields' );

function alter_woocommerce_checkout_fields( $fields ) {

  unset( $fields['billing']['billing_company'] ); // remove the option to enter in a company
  unset( $fields['billing']['billing_address_1'] ); // remove the first line of the address
  unset( $fields['billing']['billing_address_2'] ); // remove the second line of the address
  unset( $fields['billing']['billing_city'] ); // remove the billing city
  unset( $fields['billing']['billing_postcode'] ); // remove the ZIP / postal code field
  unset( $fields['billing']['billing_country'] ); // remove the billing country
  unset( $fields['billing']['billing_state'] ); // remove the billing state
  unset( $fields['billing']['billing_phone'] ); // remove the option to enter in a billing phone number
  unset( $fields['shipping']['shipping_first_name'] );

  unset( $fields['shipping']['shipping_last_name'] );

  unset( $fields['shipping']['shipping_company'] );

  unset( $fields['shipping']['shipping_address_1'] );

  unset( $fields['shipping']['shipping_address_2'] );

  unset( $fields['shipping']['shipping_city'] );

  unset( $fields['shipping']['shipping_postcode'] );

  unset( $fields['shipping']['shipping_country'] );

  unset( $fields['shipping']['shipping_state'] );

  unset( $fields['account']['account_username'] ); // removing this or the two fields below would prevent users from creating an account, which you can do via normal WordPress + Woocommerce capabilities anyway
  unset( $fields['account']['account_password'] );

  unset( $fields['account']['account_password-2'] );

  unset( $fields['order']['order_comments'] ); // removes the order comments / notes field

  return $fields;
}

;

    $_product = wc_get_product( $post_id );

    if( $_product->is_type( 'simple' ) ) {
    // do stuff for simple products
    } else {
    // do stuff for everything else
    }