Add new field to woocommerce product metabox (this example for pricing tab simple product) #wordpress #woocommerce

add_meta.php

<?php

add_action('woocommerce_product_options_pricing', 'atlantean_coming_soon');

function atlantean_coming_soon() {
    woocommerce_wp_checkbox( array(
        'id' => '_coming_soon',
        'wrapper_class' => 'show_if_simple show_if_variable',
        'label' => __( 'Coming soon', 'woocommerce' ),
        'description' => __( 'Enable coming soon label', 'woocommerce' )
    ) );
}
add_action('woocommerce_process_product_meta_simple', 'atlantean_save_coming_soon');

function atlantean_save_coming_soon($post_id) {
    update_post_meta($post_id, '_coming_soon',  esc_attr($_POST['_coming_soon']));
}


add_action( 'category_add_form_fields', '___add_form_field_term_meta_text' );

function ___add_form_field_term_meta_text() { ?>
    <?php wp_nonce_field( basename( __FILE__ ), 'term_meta_text_nonce' ); ?>
    <div class="form-field term-meta-text-wrap">
        <label for="term-meta-text"><?php _e( 'TERM META TEXT', 'text_domain' ); ?></label>
        <input type="text" name="term_meta_text" id="term-meta-text" value="" class="term-meta-text-field" />
    </div>
<?php }


// ADD FIELD TO CATEGORY EDIT PAGE

add_action( 'category_edit_form_fields', '___edit_form_field_term_meta_text' );

function ___edit_form_field_term_meta_text( $term ) {

    $value  = ___get_term_meta_text( $term->term_id );

    if ( ! $value )
        $value = ""; ?>

    <tr class="form-field term-meta-text-wrap">
        <th scope="row"><label for="term-meta-text"><?php _e( 'TERM META TEXT', 'text_domain' ); ?></label></th>
        <td>
            <?php wp_nonce_field( basename( __FILE__ ), 'term_meta_text_nonce' ); ?>
            <input type="text" name="term_meta_text" id="term-meta-text" value="<?php echo esc_attr( $value ); ?>" class="term-meta-text-field"  />
        </td>
    </tr>
<?php }