You can use this:

     $user = get_user_by( \'email\', \'[email protected]\' );/*$user gives you all data*/
     $first_name = $user->first_name;/*$first_name gives you first name*/
     $last_name = $user->last_name;

如果您想要一个短代码来实现它，您可以在主题的functions.php:

<?php 
function custom_user_func( $atts ) {
    $user= $atts[\'email\'];
    $user_info = get_user_by( \'email\', $user );
    $username = $user_info->user_login;
    $first_name = $user_info->first_name;
    $last_name = $user_info->last_name;
    return "First name = {$first_name}, Last name = {$last_name}, Username = {$username}";
}
add_shortcode( \'customuser\', \'custom_user_func\' ); 
?>

您可以通过用户的电子邮件获取用户的详细信息，使用function get_user_by().要获取Firstname和Lastname，您可以使用以下代码段：

<?php
   $user = get_user_by( \'email\', \'[email protected]\' );
   echo \'User is \' . $user->first_name . \' \' . $user->last_name;
?>