agregue un campo personalizado al producto personalizado woocommerce por ejemplo de código php

Ejemplo 1: agregar un campo personalizado a la variación woocommerce

/**
 * @snippet       Add Custom Field to Product Variations - WooCommerce
 * @how-to        Get CustomizeWoo.com FREE
 * @sourcecode    https://businessbloomer.com/?p=73545
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 3.5.6
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
// -----------------------------------------
// 1. Add custom field input @ Product Data > Variations > Single Variation
 
add_action( 'woocommerce_variation_options_pricing', 'bbloomer_add_custom_field_to_variations', 10, 3 );
 
function bbloomer_add_custom_field_to_variations( $loop, $variation_data, $variation ) {
woocommerce_wp_text_input( array(
'id' => 'custom_field[' . $loop . ']',
'class' => 'short',
'label' => __( 'Custom Field', 'woocommerce' ),
'value' => get_post_meta( $variation->ID, 'custom_field', true )
)
);
}
 
// -----------------------------------------
// 2. Save custom field on product variation save
 
add_action( 'woocommerce_save_product_variation', 'bbloomer_save_custom_field_variations', 10, 2 );
 
function bbloomer_save_custom_field_variations( $variation_id, $i ) {
$custom_field = $_POST['custom_field'][$i];
if ( isset( $custom_field ) ) update_post_meta( $variation_id, 'custom_field', esc_attr( $custom_field ) );
}
 
// -----------------------------------------
// 3. Store custom field value into variation data
 
add_filter( 'woocommerce_available_variation', 'bbloomer_add_custom_field_variation_data' );
 
function bbloomer_add_custom_field_variation_data( $variations ) {
$variations['custom_field'] = '<div>Custom Field: <span>' . get_post_meta( $variations[ 'variation_id' ], 'custom_field', true ) . '</span></div>';
return $variations;
}

Ejemplo 2: Mostrar campo de entrada personalizado en la página de un solo producto de WooCommerce

/**
 * @snippet       Add input field to products - WooCommerce
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 3.9
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
// -----------------------------------------
// 1. Show custom input field above Add to Cart
 
add_action( 'woocommerce_before_add_to_cart_button', 'bbloomer_product_add_on', 9 );
 
function bbloomer_product_add_on() {
    $value = isset( $_POST['custom_text_add_on'] ) ? sanitize_text_field( $_POST['custom_text_add_on'] ) : '';
    echo '<div><label>Custom Text Add-On <abbr title="required">*</abbr></label><p><input name="custom_text_add_on" value="' . $value . '"></p></div>';
}
 
// -----------------------------------------
// 2. Throw error if custom input field empty
 
add_filter( 'woocommerce_add_to_cart_validation', 'bbloomer_product_add_on_validation', 10, 3 );
 
function bbloomer_product_add_on_validation( $passed, $product_id, $qty ){
   if( isset( $_POST['custom_text_add_on'] ) && sanitize_text_field( $_POST['custom_text_add_on'] ) == '' ) {
      wc_add_notice( 'Custom Text Add-On is a required field', 'error' );
      $passed = false;
   }
   return $passed;
}
 
// -----------------------------------------
// 3. Save custom input field value into cart item data
 
add_filter( 'woocommerce_add_cart_item_data', 'bbloomer_product_add_on_cart_item_data', 10, 2 );
 
function bbloomer_product_add_on_cart_item_data( $cart_item, $product_id ){
    if( isset( $_POST['custom_text_add_on'] ) ) {
        $cart_item['custom_text_add_on'] = sanitize_text_field( $_POST['custom_text_add_on'] );
    }
    return $cart_item;
}
 
// -----------------------------------------
// 4. Display custom input field value @ Cart
 
add_filter( 'woocommerce_get_item_data', 'bbloomer_product_add_on_display_cart', 10, 2 );
 
function bbloomer_product_add_on_display_cart( $data, $cart_item ) {
    if ( isset( $cart_item['custom_text_add_on'] ) ){
        $data[] = array(
            'name' => 'Custom Text Add-On',
            'value' => sanitize_text_field( $cart_item['custom_text_add_on'] )
        );
    }
    return $data;
}
 
// -----------------------------------------
// 5. Save custom input field value into order item meta
 
add_action( 'woocommerce_add_order_item_meta', 'bbloomer_product_add_on_order_item_meta', 10, 2 );
 
function bbloomer_product_add_on_order_item_meta( $item_id, $values ) {
    if ( ! empty( $values['custom_text_add_on'] ) ) {
        wc_add_order_item_meta( $item_id, 'Custom Text Add-On', $values['custom_text_add_on'], true );
    }
}
 
// -----------------------------------------
// 6. Display custom input field value into order table
 
add_filter( 'woocommerce_order_item_product', 'bbloomer_product_add_on_display_order', 10, 2 );
 
function bbloomer_product_add_on_display_order( $cart_item, $order_item ){
    if( isset( $order_item['custom_text_add_on'] ) ){
        $cart_item['custom_text_add_on'] = $order_item['custom_text_add_on'];
    }
    return $cart_item;
}
 
// -----------------------------------------
// 7. Display custom input field value into order emails
 
add_filter( 'woocommerce_email_order_meta_fields', 'bbloomer_product_add_on_display_emails' );
 
function bbloomer_product_add_on_display_emails( $fields ) { 
    $fields['custom_text_add_on'] = 'Custom Text Add-On';
    return $fields; 
}

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