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<?php
/**
*
* You can find the complete tutorial for this here:
* https://pluginrepublic.com/woocommerce-custom-fields
*
* Alternatively, check out the plugin
* https://pluginrepublic.com/wordpress-plugins/woocommerce-product-add-ons-ultimate/
*
*/
// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Display the custom text field
* @since 1.0.0
*/
function cfwc_create_custom_field() {
$args = array(
'id' => 'custom_text_field_title',
'label' => __( 'Custom Text Field Title', 'cfwc' ),
'class' => 'cfwc-custom-field',
'desc_tip' => true,
'description' => __( 'Enter the title of your custom text field.', 'ctwc' ),
);
woocommerce_wp_text_input( $args );
}
add_action( 'woocommerce_product_options_general_product_data', 'cfwc_create_custom_field' );
/**
* Save the custom field
* @since 1.0.0
*/
function cfwc_save_custom_field( $post_id ) {
$product = wc_get_product( $post_id );
$title = isset( $_POST['custom_text_field_title'] ) ? $_POST['custom_text_field_title'] : '';
$product->update_meta_data( 'custom_text_field_title', sanitize_text_field( $title ) );
$product->save();
}
add_action( 'woocommerce_process_product_meta', 'cfwc_save_custom_field' );
/**
* Display custom field on the front end
* @since 1.0.0
*/
function cfwc_display_custom_field() {
global $post;
// Check for the custom field value
$product = wc_get_product( $post->ID );
$title = $product->get_meta( 'custom_text_field_title' );
if( $title ) {
// Only display our field if we've got a value for the field title
printf(
'<div class="cfwc-custom-field-wrapper"><label for="cfwc-title-field">%s</label><input type="text" id="cfwc-title-field" name="cfwc-title-field" value=""></div>',
esc_html( $title )
);
}
}
add_action( 'woocommerce_before_add_to_cart_button', 'cfwc_display_custom_field' );
/**
* Validate the text field
* @since 1.0.0
* @param Array $passed Validation status.
* @param Integer $product_id Product ID.
* @param Boolean $quantity Quantity
*/
function cfwc_validate_custom_field( $passed, $product_id, $quantity ) {
if( empty( $_POST['cfwc-title-field'] ) ) {
// Fails validation
$passed = false;
wc_add_notice( __( 'Please enter a value into the text field', 'cfwc' ), 'error' );
}
return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'cfwc_validate_custom_field', 10, 3 );
/**
* Add the text field as item data to the cart object
* @since 1.0.0
* @param Array $cart_item_data Cart item meta data.
* @param Integer $product_id Product ID.
* @param Integer $variation_id Variation ID.
* @param Boolean $quantity Quantity
*/
function cfwc_add_custom_field_item_data( $cart_item_data, $product_id, $variation_id, $quantity ) {
if( ! empty( $_POST['cfwc-title-field'] ) ) {
// Add the item data
$cart_item_data['title_field'] = $_POST['cfwc-title-field'];
$product = wc_get_product( $product_id ); // Expanded function
$price = $product->get_price(); // Expanded function
$cart_item_data['total_price'] = $price + 100; // Expanded function
}
return $cart_item_data;
}
add_filter( 'woocommerce_add_cart_item_data', 'cfwc_add_custom_field_item_data', 10, 4 );
/**
* Update the price in the cart
* @since 1.0.0
*/
function cfwc_before_calculate_totals( $cart_obj ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
return;
}
// Iterate through each cart item
foreach( $cart_obj->get_cart() as $key=>$value ) {
if( isset( $value['total_price'] ) ) {
$price = $value['total_price'];
$value['data']->set_price( ( $price ) );
}
}
}
add_action( 'woocommerce_before_calculate_totals', 'cfwc_before_calculate_totals', 10, 1 );
/**
* Display the custom field value in the cart
* @since 1.0.0
*/
function cfwc_cart_item_name( $name, $cart_item, $cart_item_key ) {
if( isset( $cart_item['title_field'] ) ) {
$name .= sprintf(
'<p>%s</p>',
esc_html( $cart_item['title_field'] )
);
}
return $name;
}
add_filter( 'woocommerce_cart_item_name', 'cfwc_cart_item_name', 10, 3 );
/**
* Add custom field to order object
*/
function cfwc_add_custom_data_to_order( $item, $cart_item_key, $values, $order ) {
foreach( $item as $cart_item_key=>$values ) {
if( isset( $values['title_field'] ) ) {
$item->add_meta_data( __( 'Custom Field', 'cfwc' ), $values['title_field'], true );
}
}
}
add_action( 'woocommerce_checkout_create_order_line_item', 'cfwc_add_custom_data_to_order', 10, 4 );
@foisalmehedi

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@foisalmehedi foisalmehedi commented Nov 14, 2020

Hi, Thanks for sharing an awesome plugin. It does amazing. How can I make a pop up with the custom field and add to cart button? I mean , how can I display that pop up within this function: cfwc_create_custom_field() ? It would be very helpful If you can tell me how can I show add to cart button with quantity input.

It would be really helpful for me if you can share.
Here is my modal:
https://codepen.io/foisalmehedi/pen/QWEYBPE

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