The Problem

You have a product on your WooCommerce website or store, and you do not want your customers to be able to purchase that product more than once.

The Solution

All you need to do is add a custom function to your theme.

Here’s what you’ll need:

  1. WordPress Website.
  2. WooCommerce Plugin installed.
  3. My Custom Functions Plugin installed.

Installing and Activating “My Custom Functions” Plugin

1 – In your WordPress Dashboard navigate to Plugins and click Add New.

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2 – Search for “My Custom Functions” Plugin.

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3 – Locate My Custom Functions plugin and click Install Now.

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4 – Click Activate.

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Adding a Function

1 – After successful installation, navigate to Settings => PHP Inserter.

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2 – Paste this code:

Code
/**
* Disables repeat purchase for products / variations
*
* @param bool $purchasable true if product can be purchased
* @param \WC_Product $product the WooCommerce product
* @return bool $purchasable the updated is_purchasable check
*/
function sv_disable_repeat_purchase( $purchasable, $product ) {
// Don’t run on parents of variations,
// function will already check variations separately
if ( $product->is_type( variable ) ) {
return $purchasable;
}
// Get the ID for the current product (passed in)
$product_id = $product->is_type( variation ) ? $product->variation_id : $product->id;
// return false if the customer has bought the product / variation
if ( wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $product_id ) ) {
$purchasable = false;
}
// Double-check for variations: if parent is not purchasable, then variation is not
if ( $purchasable && $product->is_type( variation ) ) {
$purchasable = $product->parent->is_purchasable();
}
return $purchasable;
}
add_filter( woocommerce_is_purchasable, sv_disable_repeat_purchase, 10, 2 );
/**
* Shows a “purchase disabled” message to the customer
*/
function sv_purchase_disabled_message() {
// Get the current product to see if it has been purchased
global $product;
if ( $product->is_type( variable ) ) {
foreach ( $product->get_children() as $variation_id ) {
// Render the purchase restricted message if it has been purchased
if ( wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $variation_id ) ) {
sv_render_variation_non_purchasable_message( $product, $variation_id );
}
}
} else {
if ( wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $product->id ) ) {
echo <div class=”woocommerce”><div class=”woocommerce-info wc-nonpurchasable-message”>You\’ve already purchased this product! It can only be purchased once.</div></div>;
}
}
}
add_action( woocommerce_single_product_summary, sv_purchase_disabled_message, 31 );
/**
* Generates a “purchase disabled” message to the customer for specific variations
*
* @param \WC_Product $product the WooCommerce product
* @param int $no_repeats_id the id of the non-purchasable product
*/
function sv_render_variation_non_purchasable_message( $product, $no_repeats_id ) {
// Double-check we’re looking at a variable product
if ( $product->is_type( variable ) && $product->has_child() ) {
$variation_purchasable = true;
foreach ( $product->get_available_variations() as $variation ) {
// only show this message for non-purchasable variations matching our ID
if ( $no_repeats_id === $variation[variation_id] ) {
$variation_purchasable = false;
echo <div class=”woocommerce”><div class=”woocommerce-info wc-nonpurchasable-message js-variation- . sanitize_html_class( $variation[variation_id] ) . “>You\’ve already purchased this product! It can only be purchased once.</div></div>;
}
}
}
if ( ! $variation_purchasable ) {
wc_enqueue_js(
jQuery(‘.variations_form’)
.on( ‘woocommerce_variation_select_change’, function( event ) {
jQuery(‘.wc-nonpurchasable-message’).hide();
})
.on( ‘found_variation’, function( event, variation ) {
jQuery(‘.wc-nonpurchasable-message’).hide();
if ( ! variation.is_purchasable ) {
jQuery( ‘.wc-nonpurchasable-message.js-variation-‘ + variation.variation_id ).show();
}
})
.find( ‘.variations select’ ).change();
);
}
}
}
add_action(‘init’, ‘only_one_login’);
Here:

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3 – Click “ON” button.

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4 – Click “Save Changes” button.

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That’s it! You have successfully implemented a function in WooCommerce that prevents users from buying a product more than once.

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