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Add a custom SKU field to WooCommerce products.
<?php
function jk_add_custom_sku() {
$args = array(
'label' => __( 'Custom SKU', 'woocommerce' ),
'placeholder' => __( 'Enter custom SKU here', 'woocommerce' ),
'id' => 'jk_sku',
'desc_tip' => true,
'description' => __( 'This SKU is for internal use only.', 'woocommerce' ),
);
woocommerce_wp_text_input( $args );
}
add_action( 'woocommerce_product_options_sku', 'jk_add_custom_sku' );
function jk_save_custom_meta( $post_id ) {
// grab the SKU value
$sku = isset( $_POST[ 'jk_sku' ] ) ? sanitize_text_field( $_POST[ 'jk_sku' ] ) : '';
// grab the product
$product = wc_get_product( $post_id );
// save the custom SKU meta field
$product->update_meta_data( 'jk_sku', $sku );
$product->save();
}
add_action( 'woocommerce_process_product_meta', 'jk_save_custom_meta' );
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