它在新用户和编辑用户屏幕中添加字段。别忘了在你的函数中包含这一点。php文件。

<?php

class UserFieldsClass
{
    public function __construct()
    {
        // This will create a new area in the user edit screen and the add new user screen.
        add_action( \'user_new_form\', array( $this, \'show_extra_profile_fields\' ) );
        add_action( \'show_user_profile\', array( $this, \'show_extra_profile_fields\' ) );
        add_action( \'edit_user_profile\', array( $this, \'show_extra_profile_fields\' ) );

        add_action( \'personal_options_update\', array($this, \'save_extra_profile_fields\') );
        add_action( \'edit_user_profile_update\', array($this, \'save_extra_profile_fields\') );
        add_action( \'user_register\', array( $this, \'save_extra_profile_fields\' ) );
    }

    function show_extra_profile_fields($user)
    { ?>
        <h3>More Information</h3>
        <table class="form-table">
            <tr>
                <th><label for="user_skype">Skype:</label></th>
                <td>
                    <input type="text" name="user_skype" id="user_skype"
                           value="<?php echo esc_attr(get_the_author_meta(\'user_skype\', $user->ID)); ?>"
                           class="regular-text"/><br/>
                    <span class="description">Please enter your Skype username.</span>
                </td>
            </tr>
        </table>
    <?php }

    function save_extra_profile_fields( $user_id ) {
        if (!current_user_can(\'manage_options\'))
            return false;

        update_user_meta($user_id, \'user_skype\', $_POST[\'user_skype\']);
    }
}

$userFieldsClass = new UserFieldsClass();