Add Custom Text Field to Woocommerce Products Pages Post Type using Woocommerce Functions and Hooks

functions.php

// Create Woocommerce Custom Field (here called Base Name)
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' );
function woo_add_custom_general_fields() {

  global $woocommerce, $post;
  echo '<div class="options_group custom_wc_field">';
   
  	woocommerce_wp_text_input(  // Make our text field with the following
		array( 
			'id'          => 'base_name', 
			'label'       => __( 'Base Name Field', 'woocommerce' ), 
			'placeholder' => 'base name text here',
			'desc_tip'    => 'true',
			'description' => __( 'Enter the custom value here.', 'woocommerce' ) 
			)
	);
    
  echo '</div>';
	
}
// Save to the wpbd when we update the product pages (post)
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' );
function woo_add_custom_general_fields_save( $post_id ){
	
	$woocommerce_text_field = $_POST['base_name'];
	if( !empty( $woocommerce_text_field ) ) update_post_meta( $post_id, 'base_name', esc_attr( $woocommerce_text_field ) );
			
}