February 12, 2011 
Definition:
function wp_register( $before = '<li>', $after = '</li>', $echo = true ) {}
Display the Registration or Admin link.
Display a link which allows the user to navigate to the registration page if not logged in and registration is enabled or to the dashboard if logged in.
Parameters
- string $before: Text to output before the link (defaults to <li>).
- string $after: Text to output after the link (defaults to </li>).
- boolean $echo: Default to echo and not return the link.
Defined filters
- register
apply_filters('register', $link) - register
apply_filters('register', $link)
Source code
function wp_register( $before = '<li>', $after = '</li>', $echo = true ) {
if ( ! is_user_logged_in() ) {
if ( get_option('users_can_register') )
$link = $before . '<a href="' . site_url('wp-login.php?action=register', 'login') . '">' . __('Register') . '</a>' . $after;
else
$link = '';
} else {
$link = $before . '<a href="' . admin_url() . '">' . __('Site Admin') . '</a>' . $after;
}
if ( $echo )
echo apply_filters('register', $link);
else
return apply_filters('register', $link);
}
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A HitchHackers guide through WordPress 
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