// ADD USER META FIELD on WP Admin PROFILE EDIT (BIRTHDAY)

// Show and save on edit

​

function tm_additional_profile_fields( $user ) {

​

    $months     = array( 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' );

    $default    = array( 'day' => 1, 'month' => 'Jnuary', 'year' => 1950, );

    $birth_date = wp_parse_args( get_the_author_meta( 'birth_date', $user->ID ), $default );

​

    ?>

    <h3>Extra profile information</h3>

​

    <table class="form-table">

     <tr>

         <th><label for="birth-date-day">Birth date</label></th>

         <td>

             <select id="birth-date-day" name="birth_date[day]"><?php

                 for ( $i = 1; $i <= 31; $i++ ) {

                     printf( '<option value="%1$s" %2$s>%1$s</option>', $i, selected( $birth_date['day'], $i, false ) );

                 }

             ?></select>

             <select id="birth-date-month" name="birth_date[month]"><?php

                 foreach ( $months as $month ) {

                     printf( '<option value="%1$s" %2$s>%1$s</option>', $month, selected( $birth_date['month'], $month, false ) );

                 }

             ?></select>

             <select id="birth-date-year" name="birth_date[year]"><?php

                 for ( $i = 1950; $i <= 2015; $i++ ) {

                     printf( '<option value="%1$s" %2$s>%1$s</option>', $i, selected( $birth_date['year'], $i, false ) );

                 }

             ?></select>

         </td>

     </tr>

    </table>

    <?php

}

​

add_action( 'show_user_profile', 'tm_additional_profile_fields' );

add_action( 'edit_user_profile', 'tm_additional_profile_fields' );

​

function tm_save_profile_fields( $user_id ) {

​

    if ( ! current_user_can( 'edit_user', $user_id ) ) {

     return false;

    }

​

    if ( empty( $_POST['birth_date'] ) ) {

     return false;

    }

​

    update_usermeta( $user_id, 'birth_date', $_POST['birth_date'] );

}

​

add_action( 'personal_options_update', 'tm_save_profile_fields' );

add_action( 'edit_user_profile_update', 'tm_save_profile_fields' );

<?php

// Add to a WordPress User some metaData (so you can control it somewhere else)

$user_id = 1;

$metaData = 'subscribed';

add_user_meta( $user_id, '_subscribedService1', $metaData);

?>

<?php

/**

 * The field on the editing screens.

 *

 * @param $user WP_User user object

 */

function wporg_usermeta_form_field_birthday( $user )

{

    ?>

    <h3>It's Your Birthday</h3>

    <table class="form-table">

        <tr>

            <th>

                <label for="birthday">Birthday</label>

            </th>

            <td>

                <input type="date"

                       class="regular-text ltr"

                       id="birthday"

                       name="birthday"

                       value="<?= esc_attr( get_user_meta( $user->ID, 'birthday', true ) ) ?>"

                       title="Please use YYYY-MM-DD as the date format."

                       pattern="(19[0-9][0-9]|20[0-9][0-9])-(1[0-2]|0[1-9])-(3[01]|[21][0-9]|0[1-9])"

                       required>

                <p class="description">

                    Please enter your birthday date.

                </p>

            </td>

        </tr>

    </table>

    <?php

}

/**

 * The save action.

 *

 * @param $user_id int the ID of the current user.

 *

 * @return bool Meta ID if the key didn't exist, true on successful update, false on failure.

 */

function wporg_usermeta_form_field_birthday_update( $user_id )

{

    // check that the current user have the capability to edit the $user_id

    if ( ! current_user_can( 'edit_user', $user_id ) ) {

        return false;

    }

    // create/update user meta for the $user_id

    return update_user_meta(

        $user_id,

        'birthday',

        $_POST['birthday']

    );

}

// Add the field to user's own profile editing screen.

add_action(

    'show_user_profile',

    'wporg_usermeta_form_field_birthday'

);

// Add the field to user profile editing screen.

add_action(

    'edit_user_profile',

    'wporg_usermeta_form_field_birthday'

);

// Add the save action to user's own profile editing screen update.

add_action(

    'personal_options_update',

    'wporg_usermeta_form_field_birthday_update'

);

// Add the save action to user profile editing screen update.

add_action(

    'edit_user_profile_update',

    'wporg_usermeta_form_field_birthday_update'

);