我的页面上出现了这个错误。我试图评论掉"$mine"，但它允许我添加自己的个人资料。我需要说的是，如果页面或用户不是我，那么显示添加或删除好友选项。有什么建议吗？我从这个youtube视频中得到了以下代码：https://www.youtube.com/watch?v=Wgbmgf84ZOo
<?php
require_once('includes/class-query.php');
require_once('includes/class-insert.php');
if ( !empty ( $_POST ) ) {
if ( $_POST['type'] == 'add' ) {
$add_friend = $insert->add_friend($_POST['user_id'], $_POST['friend_id']);
}
if ( $_POST['type'] == 'remove' ) {
$remove_friend = $insert->remove_friend($_POST['user_id'], $_POST['friend_id']);
}
}
$logged_user_id = 1;
if ( !empty ( $_GET['uid'] ) ) {
$user_id = $_GET['uid'];
$user = $query->load_user_object($user_id);
if ( $logged_user_id == $user_id ) {
}
} else {
$user = $query->load_user_object($logged_user_id);
}
$friends = $query->get_friends($logged_user_id);
?>
<!DOCTYPE html>
<html>
<head>
<title>Home</title>
<link rel="stylesheet" href="css/style.css" />
</head>
<body>
<div id="navigation">
<ul>
<li><a href="/social">Home</a></li>
<li><a href="profile-view.php">View Profile</a></li>
<li><a href="profile-edit.php">Edit Profile</a></li>
<li><a href="friends-directory.php">Member Directory</a></li>
<li><a href="friends-list.php">Friends List</a></li>
<li><a href="feed-view.php">View Feed</a></li>
<li><a href="feed-post.php">Post Status</a></li>
<li><a href="messages-inbox.php">Inbox</a></li>
<li><a href="messages-compose.php">Compose</a></li>
</ul>
</div>
<h1>View Profile</h1>
<div class="content">
<p>Name: <?php echo $user->user_nicename; ?></p>
<p>Email Address: <?php echo $user->user_email; ?></p>
<?php if ( !$mine ) : ?>
<?php if ( !in_array($user_id, $friends) ) : ?>
<p>
<form method="post">
<input name="user_id" type="hidden" value="<?php echo $logged_user_id; ?>" />
<input name="friend_id" type="hidden" value="<?php echo $user_id; ?>" />
<input name="type" type="hidden" value="add" />
<input type="submit" value="Add as Friend" />
</form>
</p>
<?php else : ?>
<p>
<form method="post">
<input name="user_id" type="hidden" value="<?php echo $logged_user_id; ?>" />
<input name="friend_id" type="hidden" value="<?php echo $user_id; ?>" />
<input name="type" type="hidden" value="remove" />
<input type="submit" value="Remove Friend" />
</form>
</p>
<?php endif; ?>
<?php endif; ?>
</div>
</body>
</html>
这是一个通知，而不是致命错误。if（！$mime）正在返回通知。将其更改为if（！isset（$mime）），错误将被抑制：
<p>Email Address: <?php echo $user->user_email; ?></p>
<?php if ( !isset($mine) ) : ?>
<?php if ( !in_array($user_id, $friends) ) : ?>