Wordpress user registration database

Question

I'm new to plugin development. For a plugin, I want to add custom user fields and add them into the user meta database and then use the fields later on in front end.

But I'm a bit stuck with getting it right. Could someone explain how to do this?

Answer 1

我试图向您展示一个例子。假设我想为每个用户创建一个新的 Facebook URL 字段。以下是代码

/**
 * Creating custom field for each user
 */
function prefix_add_area_field( $user ) {

    ?>
        <h3>User Facebook URL</h3>

        <table class="form-table">
            <tr>
                <th><label for="area_id">Facebook URL</label></th>
                <td><input type="text" name="facebook_url" value="<?php echo esc_attr(get_user_meta( $user->ID, 'facebook_url', true )); ?>" class="regular-text" /></td>
            </tr>
        </table>
    <?php
}
add_action( 'show_user_profile', 'prefix_add_area_field' );
add_action( 'edit_user_profile', 'prefix_add_area_field' );

/**
 * Saving the user field from admin panel.
 */
function prefix_save_user_fields( $user_id ) {

    if ( !current_user_can( 'edit_user', $user_id ) )
        return false;
    //save text field
    update_usermeta( $user_id, 'facebook_url', $_POST['facebook_url'] );
}

add_action( 'personal_options_update', 'prefix_save_user_fields' );
add_action( 'edit_user_profile_update', 'prefix_save_user_fields' );

如果您想在前端显示自定义字段值即Facebook网址，则可以在主题文件中使用 get_usermeta（$ user_id，'facebook_url'，true）。

由于