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PHP

Different Low Stock Threshold per Category

Sets its own low stock threshold for products in chosen categories, so fast sellers warn you earlier while slow lines do not flood your inbox.

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Code

$wpide_cat_thresholds = array( // Category slug => low stock threshold.
    'best-sellers' => 20,
    'accessories'  => 5,
);

$wpide_cat_threshold = function ( $amount, $product ) use ( $wpide_cat_thresholds ) {
    if ( '' !== $product->get_low_stock_amount( 'edit' ) && null !== $product->get_low_stock_amount( 'edit' ) ) {
        return $amount;
    }

    $id = $product->get_parent_id() ? $product->get_parent_id() : $product->get_id();

    foreach ( $wpide_cat_thresholds as $slug => $threshold ) {
        if ( has_term( $slug, 'product_cat', $id ) ) {
            return $threshold;
        }
    }

    return $amount;
};

add_filter( 'woocommerce_product_get_low_stock_amount', $wpide_cat_threshold, 10, 2 );
add_filter( 'woocommerce_product_variation_get_low_stock_amount', $wpide_cat_threshold, 10, 2 );

Notes

A threshold set on an individual product still wins, and the change affects low stock emails and reports.

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