Display content only for logged users

How can I show content only for logged user or admin in my template?

Depending on what you want to test, just add one of these snippets to your template:

Check if user is connected as admin

<?php
if( current_user_can('administrator')) {
 // 
}
?>

Check if user is connected as admin, editor or author

<?php
$user = wp_get_current_user();
$allowed_roles = array('administrator','editor','author');
if( array_intersect($allowed_roles, $user->roles ) ) {
 //
}
?>

Check if user is connected

<?php
if ( is_user_logged_in() ) {
 //
}
?>