custom field single & variation

functions

/*-----------------------------------------------------------*/
/* WooCommerce : add custom fields to product variations
/* https://gist.github.com/corsonr/9152652#file-gistfile1-php
/*----------------------------------------------------------*/

//Display Fields
add_action( 'woocommerce_product_after_variable_attributes', 'variable_fields', 10, 2 );
//JS to add fields for new variations
add_action( 'woocommerce_product_after_variable_attributes_js', 'variable_fields_js' );
//Save variation fields
add_action( 'woocommerce_process_product_meta_variable', 'save_variable_fields', 10, 1 );

/**
 * Create new fields for variations
 *
 */
function variable_fields( $loop, $variation_data ) {
    ?>
    <tr>
        <td>
            <?php

            // Text Field
            woocommerce_wp_text_input(
                array(
                    'id'          => '_text_field['.$loop.']',
                    'label'       => __( 'Dimensiune produs', 'woocommerce' ),
                    'placeholder' => 'Cod produs',
                    'desc_tip'    => 'true',
                    'value'       => $variation_data['_text_field'][0]
                )
            );
            ?>
        </td>
    </tr>
    <tr>
        <td>
            <?php
            // Hidden field
            woocommerce_wp_hidden_input(
                array(
                    'id'    => '_hidden_field['.$loop.']',
                    'value' => 'hidden_value'
                )
            );
            ?>
        </td>
    </tr>
<?php
}

/**
 * Create new fields for new variations
 *
 */
function variable_fields_js() {
    ?>
    <tr>
        <td>
            <?php
            // Text Field
            woocommerce_wp_text_input(
                array(
                    'id'          => '_text_field[ + loop + ]',
                    'label'       => __( 'Dimensiune produs', 'woocommerce' ),
                    'placeholder' => 'Cod produs',
                    'desc_tip'    => 'true',
                    'value'       => $variation_data['_text_field'][0]
                )
            );
            ?>
        </td>
    </tr>

    <tr>
        <td>
            <?php
            // Hidden field
            woocommerce_wp_hidden_input(
                array(
                    'id'    => '_hidden_field[ + loop + ]',
                    'value' => 'hidden_value'
                )
            );
            ?>
        </td>
    </tr>
<?php
}

/**
 * Save new fields for variations
 *
 */
function save_variable_fields( $post_id )
{
    if (isset($_POST['variable_sku'])) :

        $variable_sku = $_POST['variable_sku'];
        $variable_post_id = $_POST['variable_post_id'];

        // Text Field
        $_text_field = $_POST['_text_field'];
        for ($i = 0; $i < sizeof($variable_sku); $i++) :
            $variation_id = (int)$variable_post_id[$i];
            if (isset($_text_field[$i])) {
                update_post_meta($variation_id, '_text_field', stripslashes($_text_field[$i]));
            }
        endfor;

        // Hidden field
        $_hidden_field = $_POST['_hidden_field'];
        for ($i = 0; $i < sizeof($variable_sku); $i++) :
            $variation_id = (int)$variable_post_id[$i];
            if (isset($_hidden_field[$i])) {
                update_post_meta($variation_id, '_hidden_field', stripslashes($_hidden_field[$i]));
            }
        endfor;

    endif;
}

/*
 *  Custom field for single product
 * http://www.remicorson.com/mastering-woocommerce-products-custom-fields/
 */

// Display Fields
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' );
// Save Fields
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' );

function woo_add_custom_general_fields() {

    global $woocommerce, $post;
    echo '<div class="options_group">';
    // Text Field
    woocommerce_wp_text_input(
        array(
            'id' => '_text_field_single',
            'label' => __( 'Dimensiune produs', 'woocommerce' ),
            'placeholder' => 'http://',
            'desc_tip' => 'true',
            'description' => __( 'Enter the custom value here.', 'woocommerce' )
        )
    );
    echo '</div>';
}

function woo_add_custom_general_fields_save( $post_id ){
// Text Field
    $woocommerce_text_field = $_POST['_text_field_single'];
    if( !empty( $woocommerce_text_field ) )
        update_post_meta( $post_id, '_text_field_single', esc_attr( $woocommerce_text_field ) );

// Product Field Type
    $product_field_type = $_POST['product_field_type'];
    update_post_meta( $post_id, '_product_field_type_ids', $product_field_type );
}