WordPress函数：wp_register

一、函数简介

wp_register该函数的作用是显示管理员后台的链接。

二、函数参数

• @param string $before Text to output before the link. Default <li>.
• @param string $after Text to output after the link. Default </li>.
• @param bool $display Default to echo and not return the link.
• @return void|string Void if $display argument is true, registration or admin link

三、函数案例

四、调试效果

五、源代码

/**
 * Displays 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.
 *
 * @since 1.5.0
 *
 * @param string $before  Text to output before the link. Default `<li>`.
 * @param string $after   Text to output after the link. Default `</li>`.
 * @param bool   $display Default to echo and not return the link.
 * @return void|string Void if `$display` argument is true, registration or admin link
 *                     if `$display` is false.
 */
function wp_register( $before = '<li>', $after = '</li>', $display = true ) {
	if ( ! is_user_logged_in() ) {
		if ( get_option( 'users_can_register' ) ) {
			$link = $before . '<a href="' . esc_url( wp_registration_url() ) . '">' . __( 'Register' ) . '</a>' . $after;
		} else {
			$link = '';
		}
	} elseif ( current_user_can( 'read' ) ) {
		$link = $before . '<a href="' . admin_url() . '">' . __( 'Site Admin' ) . '</a>' . $after;
	} else {
		$link = '';
	}

	/**
	 * Filters the HTML link to the Registration or Admin page.
	 *
	 * Users are sent to the admin page if logged-in, or the registration page
	 * if enabled and logged-out.
	 *
	 * @since 1.5.0
	 *
	 * @param string $link The HTML code for the link to the Registration or Admin page.
	 */
	$link = apply_filters( 'register', $link );

	if ( $display ) {
		echo $link;
	} else {
		return $link;
	}
}