我有两个类，一个名为 site_navigation ，另一个名为 member_config 。
我在site_navigation中创建了一个名为getNavBar的函数。
在这个函数中，我尝试从另一个名为member_config的类中的一个名为userLevelValidation的函数中获取用户级别。
这是我的site_navigation类：
class site_navigation {
function getNavBar() {
global $con;
$usersLevel = $member_config->userLevelValidation();
$page_link = $_SERVER['REQUEST_URI'];
if($usersLevel == "Administrator") {
?>
<li class="sidebar-heading"> <b><i>Seller</i></b> Tools</li>
<li <?php if ($page_link == "members.php") { echo "class='-active'";}?>><a href="members.php"> <i class="fa fa-home"></i> <span>Dashboard</span></a></li>
<li <?php if ($page_link == "mTokens.php") { echo "class='-active'";}?>><a href="mTokens.php"> <i class="fa fa-tachometer"></i> <span>Redeem / My Tokens</span></a></li>
<li <?php if ($page_link == "mAccount.php") { echo "class='-active'";}?>><a href="mAccount.php"> <i class="fa fa-user"></i> <span>Manage My Account</span></a></li>
<li <?php if ($page_link == "mSupport.php") { echo "class='-active'";}?>><a href="mSupport.php"> <i class="fa fa-spinner"></i> <span>Support</span></a></li>
</li>
<li class="sidebar-heading"> <b><i>Admin / Staff </i></b> Tools</li>
<li <?php if ($page_link == "admin_dash.php") { echo "class='-active'";}?>><a href="admin_dash.php"> <i class="fa fa-dashboard"></i> <span>Dashboard</span></a></li>
<li <?php if ($page_link == "admin_members.php") { echo "class='-active'";}?>><a href="admin_members.php"> <i class="fa fa-users"></i> <span>Manage Clients</span></a></li>
<li <?php if ($page_link == "admin_site.php") { echo "class='-active'";}?>><a href="admin_site.php"> <i class="fa fa-cogs"></i> <span>Manage Site</span></a></li>
<li <?php if ($page_link == "admin_server.php") { echo "class='-active'";}?>><a href="admin_server.php"> <i class="fa fa-server"></i> <span>Manage Server</span></a></li>
<li <?php if ($page_link == "admin_tokens.php") { echo "class='-active'";}?>><a href="admin_tokens.php"> <i class="fa fa-key"></i> <span>Manage Tokens</span></a></li>
<li <?php if ($page_link == "admin_updates.php") { echo "class='-active'";}?>><a href="admin_updates.php"> <i class="fa fa-user"></i> <span>Manage Updates</span></a></li>
<li <?php if ($page_link == "admin_logs.php") { echo "class='-active'";}?>><a href="admin_logs.php"> <i class="fa fa-address-book"></i> <span>Logs</span></a></li>
<li <?php if ($page_link == "admin_staff.php") { echo "class='-active'";}?>><a href="admin_staff.php"> <i class="fa fa-user-circle-o"></i> <span>Manage Staff</span></a></li>
</li>
<?php
} else if($usersLevel == "Staff") {
?>
<li class="sidebar-heading"> <b><i>User</i></b> Management</li>
<li <?php if ($page_link == "members.php") { echo "class='-active'";}?>><a href="members.php"> <i class="fa fa-home"></i> <span>Dashboard</span></a></li>
<li <?php if ($page_link == "mTokens.php") { echo "class='-active'";}?>><a href="mTokens.php"> <i class="fa fa-tachometer"></i> <span>Redeem / My Tokens</span></a></li>
<li <?php if ($page_link == "mAccount.php") { echo "class='-active'";}?>><a href="mAccount.php"> <i class="fa fa-user"></i> <span>Manage My Account</span></a></li>
<li <?php if ($page_link == "mSupport.php") { echo "class='-active'";}?>><a href="mSupport.php"> <i class="fa fa-spinner"></i> <span>Support</span></a></li>
</li>
<li class="sidebar-heading"> <b><i>Staff</i></b> Tools</li>
<li <?php if ($page_link == "admin_dash.php") { echo "class='-active'";}?>><a href="admin_dash.php"></i> Dashboard</a></li>
<li <?php if ($page_link == "admin_members.php") { echo "class='-active'";}?>><a href="admin_members.php"> Manage Clients</a></li>
<li <?php if ($page_link == "admin_tokens.php") { echo "class='-active'";}?>><a href="admin_tokens.php"> Manage Tokens</a></li>
<li <?php if ($page_link == "admin_updates.php") { echo "class='-active'";}?>><a href="admin_updates.php"> Manage Updates</a></li>
<li <?php if ($page_link == "admin_support.php") { echo "class='-active'";}?>><a href="admin_support.php"> Manage Support</a></li>
</li>
<?php
} else if($usersLevel == "Seller") {
?>
<li class="sidebar-heading"> <b><i>Seller</i></b> Tools</li>
<li <?php if ($page_link == "members.php") { echo "class='-active'";}?>><a href="members.php"> <i class="fa fa-home"></i> <span>Dashboard</span></a></li>
<li <?php if ($page_link == "mTokens.php") { echo "class='-active'";}?>><a href="mTokens.php"> <i class="fa fa-tachometer"></i> <span>Redeem / My Tokens</span></a></li>
<li <?php if ($page_link == "mAccount.php") { echo "class='-active'";}?>><a href="mAccount.php"> <i class="fa fa-user"></i> <span>Manage My Account</span></a></li>
<li <?php if ($page_link == "mSupport.php") { echo "class='-active'";}?>><a href="mSupport.php"> <i class="fa fa-shopping-cart"></i> <span>Support</span></a></li>
</li>
<?php
}
}
}
//Call the class function for site_config
$site_nav = new site_navigation();
这是我的member_config类：
class member_config {
function grabUserInfos()
{
global $con;
$username = $_SESSION["username"];
$query = "SELECT id, username, password, email, cpukey, salt, ip, time, titleid, enabled, kvdata, lastonline, profile_picture, userLevel, register_time, customlifetimenotify, gamertag FROM users WHERE username = '$username'";
$result = $con->query($query) or die("Error");
return $result->fetch_all();
}
function userLevelValidation()
{
global $con;
$users = $this->grabUserInfos();
foreach ($users as $user) {
$userLevel = $user[13];
if ($userLevel == 3) {
return "Administrator";
} else if ($userLevel == 2) {
return "Staff";
} else if ($userLevel == 1) {
return "Seller";
} else
return "Unknown";
}
}
}
//Call the class function for member_config
$member_config = new member_config();
我如何在getNavBar函数中调用site_navigation类中的userLevelValidation();？
我试过这个：$usersLevel = $member_config->userLevelValidation();但是它说
Fatal Error: Call to a member function userLevelValidation() on null.
答案 0 :(得分：1)
执行以下操作：
<?php
class test1
{
private $name = 'Akbari';
function getName()
{
return $this->name;
}
}
class test2
{
function __construct()
{
}
function callA()
{
$test1Object = new test1();
$name = $test1Object->getName();
echo $name; //Prints Akbari
}
}
//create an object
$test2Object = new test2();
$test2Object->callA();
?>