Wordpress-Update Birth Date in Woocommerce Account - wordpress

Question

I tried to implement custom field into WooCommerce registration page on my site, and works great, but if want to Modify that date into My Account page, changes are not saved. Looks like i have missed something somewhere that don't proceed data to database. This is code for custom field:
<p class="form-row form-row-last">
<label for="reg_billing_birthdate"><?php _e( 'Date of Birth', 'woocommerce' ); ?> <span class="required">*</span></label>
<input type="text" class="input-text" name="billing_birthdate" id="reg_billing_birthdate" value="<?php if ( ! empty( $_POST['billing_birthdate'] ) ) esc_attr_e( $_POST['billing_birthdate'] ); ?>" />
</p>
column billing_birthdate is created into wp_usermeta table, But i added this code also into functions.php into theme:
and this code to proceed data to database..
/**
* Below code save extra fields.
*/
function wooc_save_extra_register_fields( $customer_id ) {
if ( isset( $_POST['billing_birthdate'] ) ) {
// Billing Address field which is by default
update_user_meta( $customer_id, 'last_name', sanitize_text_field( $_POST['billing_birthdate'] ) );
// Last name field which is used in WooCommerce
update_user_meta( $customer_id, 'billing_birthdate', sanitize_text_field( $_POST['billing_birthdate'] ) );
}
}
I alse added this code to functions.php file, to be able to edit that field into edit-account page.
/**
* To display additional field at My Account page
* Once member login: edit account
*/
add_action( 'woocommerce_edit_account_form', 'my_woocommerce_edit_account_form' );
function my_woocommerce_edit_account_form() {
$user_id = get_current_user_id();
$user = get_userdata( $user_id );
if ( !$user )
return;
$birthdate = get_user_meta( $user_id, 'birthdate', true );
?>
<fieldset>
<p class="form-row form-row-thirds">
<label for="birthdate">Birth date:</label>
<input type="text" name="birthdate" value="<?php echo esc_attr( $birthdate ); ?>" class="input-text" />
<br />
<span style="font-size: 12px;">(Birth date format: DD-MM-YYYY. eg: 31-12-2005)</span>
</p>
</fieldset>
<?php
} // end func
/**
* This is to save user input into database
* hook: woocommerce_save_account_details
*/
add_action( 'woocommerce_save_account_details', 'my_woocommerce_save_account_details' );
function my_woocommerce_save_account_details( $user_id ) {
update_user_meta( $user_id, 'birthdate', htmlentities( $_POST[ 'birthdate' ] ) );
} // end func
So my question is where is my error my after editing that field into my-account page, changes are not reflected into account dashboard.

Answer 1

What I found that, you are updating the field called 'billing_birthdate' at the time you are inserting the data. But when you are editing you are updating the field 'birthdate'.
For update :
update_user_meta( $customer_id, 'billing_birthdate',htmlentities( $_POST['birthdate'] ) );
Hope this will work for you.