Added Customs Fields in back-end but can’t Save

Hello,

I tried to add some custom fields to a product page.
For this moment, I can add a custom field in General Part but I have an issue to save the information.

Here my code

//-------- I Create NEW Field on the General Part --------- //
function woo_add_custom_general_fields() {
	echo '<div style="background:#f8fbca;">';
	woocommerce_wp_text_input(
		array(
			'id' => 'CUSTOM_FIELD', 
			'label' => __('FIELD', 'woo'),
			'placeholder' => __('xxxxxxxx', 'woo'),
			'description' => __('xxxxxxxx', 'woo'),
			'desc_tip' => false,
		)
	);
	echo '</div>';
}
add_action('woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields');

But the part I can’t found the solution is this one:

//-------- I save the NEW Field --------- //
function woo_add_custom_general_fields_save($post_id) {
			$CUSTOM_FIELD = $_POST['_field'];
			if(!empty($CUSTOM_FIELD))
        update_post_meta($post_id, '_field', esc_attr($CUSTOM_FIELD));
	}

add_action('woocommerce_process_product_meta', 'woo_add_custom_general_fields_save');

I can’t save it, after save the product page, the field stay blank..

Where is my mistake?

• This topic was modified 7 years, 10 months ago by en10.