Question

我已经使用会话在codeigniter中创建了登录名，并且每当我尝试添加if语句以在用户登录后从导航栏隐藏注册页面和登录页面时，它似乎都无法正常工作。这是我的导航菜单代码，我想知道用户登录后该确切地写在哪里以及如何写下语句以隐藏注册和登录页面？

<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
		<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
			<li class="nav-item active ">
				<a class="nav-link" href="<?php echo base_url();?>index.php">Home <span class="sr-only">(current)</span></a>
			</li>
			<li class="nav-item active ">
				<a class="nav-link" href="index.php/user/account">Account</a>
			</li>
			<?php if($this->session->userdata('username')) : ?>
			<li class="nav-item">
				<a class="nav-link" href="index.php/user">Login</a>
			</li>
			<?php if($this->session->userdata('username')) : ?>
			<li class="nav-item ">
				<a class="nav-link" href="index.php/registerPage">Register</a>
			</li>
		</ul>
	</div>
</nav>

我知道会话可以正常工作，就像我每次重新登录一样，它会将我重定向到帐户页面，然后我可以选择注销并显示登录详细信息。只是不确定如何将其放在此导航菜单中。

Answer 1

您在 if语句上有误，这里我已更新您的代码。

<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
        <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
            <li class="nav-item active ">
                <a class="nav-link" href="<?php echo site_url();?>">Home <span class="sr-only">(current)</span></a>
            </li>
<?php 
//here we check if session `username` is exist. so it means that the current user is logged in correctly
if($this->session->userdata('username')) : ?>
            <li class="nav-item active ">
                <a class="nav-link" href="<?php echo site_url('/user/account'); ?>">Account</a>
            </li>
<?php else : ?>
            <li class="nav-item">
                <a class="nav-link" href="<?php echo site_url('/user'); ?>">Login</a>
            </li>
            <li class="nav-item ">
                <a class="nav-link" href="<?php echo site_url('/registerPage'); ?>">Register</a>
            </li>
<?php endif;?>
        </ul>
    </div>
</nav>

Answer 2

尝试一下

if (isset($this->session->userdata['username'])) {

    $message= '<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
            <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
              <li class="nav-item active ">
                <a class="nav-link" href="<?php echo base_url();?>">Home <span 
             class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item active ">
                <a class="nav-link" href="index.php/user/account">Account</a>
            </li>
        </ul>
    </div>
</nav>';

    } else {
        $message = '<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
        <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
            <li class="nav-item active ">
                <a class="nav-link" href="<?php echo base_url();?>">Home 
               <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item active ">
                <a class="nav-link" href="index.php/user/account">Account</a>
            </li>

            <li class="nav-item">
                <a class="nav-link" href="index.php/user">Login</a>
            </li>

            <li class="nav-item ">
                <a class="nav-link" href="index.php/registerPage">Register</a>
            </li>
        </ul>
    </div>
</nav>';}
 echo ($message);

如果用户已登录，则隐藏注册/登录页面？点火枪

2 个答案: