Question

我面临的错误，不确定我的代码有什么问题。致命错误：未捕获错误：在C：\ xampp \ htdocs \ 1605966I \ SGPFOOTPRINTS \ processLogin.php：25布尔值上调用成员函数bind_param（）的堆栈跟踪：＃0 {main}抛出在C：\ xampp \ htdocs \ 1605966I \ SGPFOOTPRINTS \ processLogin.php第25行强文本

<!DOCTYPE html>
<html>

<head>
	<link rel="stylesheet" href="styles.css">
</head>

<body>

	<div id="header">
		<h1> <img src="images/footprints.jpg "> Singapore Footprints</h1>
	</div>

	<div id="nav">
	<?php
	$userid = $_POST['username'];
	//$password will store whatever the user typed in
	$password = $_POST['password'];
	
	//insert your database codes 
	$mysqli = new mysqli("localhost","root",null,"forumdb");
	//replace the userid=? with either jon or mary, whatever user typed in to userid
	$stmt = $mysqli->prepare("select password from forumuser where userid=?");
	//going into $userid into the ? slot (NO NEED bind_param if there is no ?) 
	$stmt->bind_param("s",$userid);
	//return password but not labelled
	$stmt->execute();
	//creating a variable, $p then password will be contained inside $p (NO NEED if there is no select)
	$stmt->bind_result($p);
	//MUST fetch, if not $p is empty therefore fetching "sad" the password that user typed in into $p
	$stmt->fetch();
	
	
	if ($p==$password){
		echo "Welcome! You have logged in successfully! <br> <br>";
		echo "Please <a href='comments.html'>Click Here</a> to continue <br> <br>";
		//userid 
		//echo "<a href=messages.php?userid=$userid>Go to my messages</a>";
	}
	else{
		echo "Unsuccessful login";
	}
	
	$stmt->close();
	$mysqli->close();
	?>
	</div>

	<div id="footer-push">
	</div>

	<div id="footer">
		Copyright &copy; School of IIT
	</div>

</body>
</html>

enter image description here

致命错误：未捕获错误：在布尔值和堆栈跟踪上调用成员函数bind_param（）：抛出＃0 {main}

0 个答案: