我收到以下错误：
Notice: Undefined property: stdClass::$body and stdClass::$receiver in line 157,158
Notice>: Undefined property: stdClass::$body in C:\xampp\htdocs\project\api\index.php on line 157
Notice: Undefined property: stdClass::$receiver in <b>C:\xampp\htdocs\project\api\index.php</b> on line <b>158</b><br />
这是我的代码：
<?php
require_once("DB.php");
require_once("Mail.php");
$db = new DB("localhost", "SocialNetwork", "root", "root");
if ($_SERVER['REQUEST_METHOD'] == "GET") {
if ($_GET['url'] == "musers") {
$token = $_COOKIE['SNID'];
$userid = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
$users = $db->query("SELECT DISTINCT s.username AS Sender, r.username AS Receiver, s.id AS SenderID, r.id AS ReceiverID FROM messages LEFT JOIN users s ON s.id = messages.sender LEFT JOIN users r ON r.id = messages.receiver WHERE (s.id = :userid OR r.id=:userid)", array(":userid"=>$userid));
$u = array();
foreach ($users as $user) {
if (!in_array(array('username'=>$user['Receiver'], 'id'=>$user['ReceiverID']), $u)) {
array_push($u, array('username'=>$user['Receiver'], 'id'=>$user['ReceiverID']));
}
if (!in_array(array('username'=>$user['Sender'], 'id'=>$user['SenderID']), $u)) {
array_push($u, array('username'=>$user['Sender'], 'id'=>$user['SenderID']));
}
}
echo json_encode($u);
} else if ($_GET['url'] == "auth") {
} else if ($_GET['url'] == "messages") {
$sender = $_GET['sender'];
$token = $_COOKIE['SNID'];
$receiver = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
$messages = $db->query('SELECT messages.id, messages.body, s.username AS Sender, r.username AS Receiver
FROM messages
LEFT JOIN users s ON messages.sender = s.id
LEFT JOIN users r ON messages.receiver = r.id
WHERE (r.id=:r AND s.id=:s) OR r.id=:s AND s.id=:r', array(':r'=>$receiver, ':s'=>$sender));
echo json_encode($messages);
} else if ($_GET['url'] == "search") {
$tosearch = explode(" ", $_GET['query']);
if (count($tosearch) == 1) {
$tosearch = str_split($tosearch[0], 2);
}
$whereclause = "";
$paramsarray = array(':body'=>'%'.$_GET['query'].'%');
for ($i = 0; $i < count($tosearch); $i++) {
if ($i % 2) {
$whereclause .= " OR body LIKE :p$i ";
$paramsarray[":p$i"] = $tosearch[$i];
}
}
$posts = $db->query('SELECT posts.id, posts.body, users.username, posts.posted_at FROM posts, users WHERE users.id = posts.user_id AND posts.body LIKE :body '.$whereclause.' LIMIT 10', $paramsarray);
//echo "<pre>";
echo json_encode($posts);
} else if ($_GET['url'] == "users") {
$token = $_COOKIE['SNID'];
$user_id = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
$username = $db->query('SELECT username FROM users WHERE id=:uid', array(':uid'=>$user_id))[0]['username'];
echo $username;
} else if ($_GET['url'] == "comments" && isset($_GET['postid'])) {
$output = "";
$comments = $db->query('SELECT comments.comment, users.username FROM comments, users WHERE post_id = :postid AND comments.user_id = users.id', array(':postid'=>$_GET['postid']));
$output .= "[";
foreach($comments as $comment) {
$output .= "{";
$output .= '"Comment": "'.$comment['comment'].'",';
$output .= '"CommentedBy": "'.$comment['username'].'"';
$output .= "},";
//echo $comment['comment']." ~ ".$comment['username']."<hr />";
}
$output = substr($output, 0, strlen($output)-1);
$output .= "]";
echo $output;
} else if ($_GET['url'] == "posts") {
$token = $_COOKIE['SNID'];
$userid = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
$followingposts = $db->query('SELECT posts.id, posts.body, posts.posted_at, posts.postimg, posts.likes, users.`username` FROM users, posts, followers
WHERE (posts.user_id = followers.user_id
OR posts.user_id = :userid)
AND users.id = posts.user_id
AND follower_id = :userid
ORDER BY posts.likes DESC;', array(':userid'=>$userid), array(':userid'=>$userid));
$response = "[";
foreach($followingposts as $post) {
$response .= "{";
$response .= '"PostId": '.$post['id'].',';
$response .= '"PostBody": "'.$post['body'].'",';
$response .= '"PostedBy": "'.$post['username'].'",';
$response .= '"PostDate": "'.$post['posted_at'].'",';
$response .= '"PostImage": "'.$post['postimg'].'",';
$response .= '"Likes": '.$post['likes'].'';
$response .= "},";
}
$response = substr($response, 0, strlen($response)-1);
$response .= "]";
http_response_code(200);
echo $response;
} else if ($_GET['url'] == "profileposts") {
$start = (int)$_GET['start'];
$userid = $db->query('SELECT id FROM users WHERE username=:username', array(':username'=>$_GET['username']))[0]['id'];
$followingposts = $db->query('SELECT posts.id, posts.body, posts.posted_at, posts.postimg, posts.likes, users.`username` FROM users, posts
WHERE users.id = posts.user_id
AND users.id = :userid
ORDER BY posts.posted_at DESC
LIMIT 5
OFFSET '.$start.';', array(':userid'=>$userid));
$response = "[";
foreach($followingposts as $post) {
$response .= "{";
$response .= '"PostId": '.$post['id'].',';
$response .= '"PostBody": "'.$post['body'].'",';
$response .= '"PostedBy": "'.$post['username'].'",';
$response .= '"PostDate": "'.$post['posted_at'].'",';
$response .= '"PostImage": "'.$post['postimg'].'",';
$response .= '"Likes": '.$post['likes'].'';
$response .= "},";
}
$response = substr($response, 0, strlen($response)-1);
$response .= "]";
http_response_code(200);
echo $response;
}
} else if ($_SERVER['REQUEST_METHOD'] == "POST") {
if (isset($_COOKIE['SNID'])) {
$token = $_COOKIE['SNID'];
} else {
die();
}
$userid = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
$postBody = file_get_contents("php://input");
$postBody = json_decode($postBody);
$body = $postBody;
$receiver = $postBody;
if (strlen($body) > 500) {
echo "{ 'Error': 'Message too long!' }";
}
if ($body == null) {
$body = "";
}
if ($receiver == null) {
die();
}
if ($userid == null) {
die();
}
$db->query("INSERT INTO messages VALUES ('', :body, :sender, :receiver, '0')", array(':body'=>$body, ':sender'=>$userid, ':receiver'=>$receiver));
echo '{ "Success": "Message Sent!" }';
if ($_GET['url'] == "message") {
} else if ($_GET['url'] == "users") {
$postBody = file_get_contents("php://input");
$postBody = json_decode($postBody);
$username = $postBody->username;
$email = $postBody->email;
$password = $postBody->password;
if (!$db->query('SELECT username FROM users WHERE username=:username', array(':username'=>$username))) {
if (strlen($username) >= 3 && strlen($username) <= 32) {
if (preg_match('/[a-zA-Z0-9_]+/', $username)) {
if (strlen($password) >= 6 && strlen($password) <= 60) {
if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
if (!$db->query('SELECT email FROM users WHERE email=:email', array(':email'=>$email))) {
$db->query('INSERT INTO users VALUES (\'\', :username, :password, :email, \'0\', \'\')', array(':username'=>$username, ':password'=>password_hash($password, PASSWORD_BCRYPT), ':email'=>$email));
Mail::sendMail('Welcome to our Social Network!', 'Your account has been created!', $email);
echo '{ "Success": "User Created!" }';
http_response_code(200);
} else {
echo '{ "Error": "Email in use!" }';
http_response_code(409);
}
} else {
echo '{ "Error": "Invalid Email!" }';
http_response_code(409);
}
} else {
echo '{ "Error": "Invalid Password!" }';
http_response_code(409);
}
} else {
echo '{ "Error": "Invalid Username!" }';
http_response_code(409);
}
} else {
echo '{ "Error": "Invalid Username!" }';
http_response_code(409);
}
} else {
echo '{ "Error": "User exists!" }';
http_response_code(409);
}
}
if ($_GET['url'] == "post") {
$token = $_COOKIE['SNID'];
$userid = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
echo "Dfdf";
}
if ($_GET['url'] == "auth") {
$postBody = file_get_contents("php://input");
$postBody = json_decode($postBody);
$username = $postBody->username;
$password = $postBody->password;
if ($db->query('SELECT username FROM users WHERE username=:username', array(':username'=>$username))) {
if (password_verify($password, $db->query('SELECT password FROM users WHERE username=:username', array(':username'=>$username))[0]['password'])) {
$cstrong = True;
$token = bin2hex(openssl_random_pseudo_bytes(64, $cstrong));
$user_id = $db->query('SELECT id FROM users WHERE username=:username', array(':username'=>$username))[0]['id'];
$db->query('INSERT INTO login_tokens VALUES (\'\', :token, :user_id)', array(':token'=>sha1($token), ':user_id'=>$user_id));
echo '{ "Token": "'.$token.'" }';
} else {
echo '{ "Error": "Invalid username or password!" }';
http_response_code(401);
}
} else {
echo '{ "Error": "Invalid username or password!" }';
http_response_code(401);
}
} else if ($_GET['url'] == "likes") {
$postId = $_GET['id'];
$token = $_COOKIE['SNID'];
$likerId = $db->query('SELECT user_id FROM login_tokens WHERE token=:token', array(':token'=>sha1($token)))[0]['user_id'];
if (!$db->query('SELECT user_id FROM post_likes WHERE post_id=:postid AND user_id=:userid', array(':postid'=>$postId, ':userid'=>$likerId))) {
$db->query('UPDATE posts SET likes=likes+1 WHERE id=:postid', array(':postid'=>$postId));
$db->query('INSERT INTO post_likes VALUES (\'\', :postid, :userid)', array(':postid'=>$postId, ':userid'=>$likerId));
//Notify::createNotify("", $postId);
} else {
$db->query('UPDATE posts SET likes=likes-1 WHERE id=:postid', array(':postid'=>$postId));
$db->query('DELETE FROM post_likes WHERE post_id=:postid AND user_id=:userid', array(':postid'=>$postId, ':userid'=>$likerId));
}
echo "{";
echo '"Likes":';
echo $db->query('SELECT likes FROM posts WHERE id=:postid', array(':postid'=>$postId))[0]['likes'];
echo "}";
}
} else if ($_SERVER['REQUEST_METHOD'] == "DELETE") {
if ($_GET['url'] == "auth") {
if (isset($_GET['token'])) {
if ($db->query("SELECT token FROM login_tokens WHERE token=:token", array(':token'=>sha1($_GET['token'])))) {
$db->query('DELETE FROM login_tokens WHERE token=:token', array(':token'=>sha1($_GET['token'])));
echo '{ "Status": "Success" }';
http_response_code(200);
} else {
echo '{ "Error": "Invalid token" }';
http_response_code(400);
}
} else {
echo '{ "Error": "Malformed request" }';
http_response_code(400);
}
}
} else {
http_response_code(405);
}
// Helper functions
?>