此文件包含搜索表单的代码：
search.php
<?php
session_start();
?>
<html>
<head>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<?php
echo"WELCOME ".strtoupper($_SESSION['user']);
?>
<form method="get" action="searched.php">
<label for="ques"></label>
<input type="text" name="title" id="title" placeholder="Search...">
<button type="submit" name="search"><i class="fa fa-search"></i></button>
</form>
<form method="post" action="question.php">
<button type="submit" name="ask_ques">Ask a Question</button>
</form>
</body>
</html>
此文件从搜索栏获取输入，并显示带问题和答案的标题（如果有）。它还包含一个回答问题的评论框：
searched.php
<?php
session_start();
?>
<html>
<head>
</head>
<body>
<?php
$conn=new mysqli("localhost","khushank","sethi","q&a");
if($conn->connect_error){
echo "unable to connect";
}
if($_SERVER['REQUEST_METHOD']=='GET'){
if(isset($_GET['search'])){
$title=$_GET['title'];
$qsel=" SELECT title,qemail,ques FROM question WHERE title='$title' ";
if($qresult=$conn->query($qsel)){
if($qresult->num_rows==0){
header('location:question.php');
}
else{
while($qres=$qresult->fetch_assoc()){
echo "<strong>".ucfirst($qres['title'])."</strong><br><br>";
echo $qres['qemail'];
?>
<textarea cols="65" id="qdes"><?php echo $qres['ques']; ?></textarea><br><br>
<?php
$asel=" SELECT answer.aemail,answer.ans FROM question JOIN answer ON question.ques=answer.ques ";
if($aresult=$conn->query($asel)){
if($aresult->num_rows>0){
while($ares=$aresult->fetch_assoc()){
echo"Answer:";
?>
<textarea cols="65" id="ades"><?php echo $ares['ans']; ?></textarea><br><br>
<?php
}
}
?>
<form method="get" action="insertA.php?$ques='$qres['ques']'">
<label for="ans"><?php
echo $_SESSION['user'];
?></label>
<textarea cols="90" name="ans" placeholder="Your Answer"></textarea>
<input type="submit" name="comment" value="submit">
</form>
<?php
}
else{
echo "answer not selected";
}
}
}
}
else{
echo"not selected";
}
}
}
$conn->close();
?>
</body>
</html>
在此文件中，使用GET方法存储答案，但无法插入数据库：
insert.php
<?php
require 'searched.php';
$conn=new mysqli("localhost","khushank","sethi","q&a");
if($conn->connect_error){
echo "unable to connect";
}
echo"connected";
if($_SERVER['REQUEST_METHOD']=='GET'){
if(isset($_GET['comment'])){
$ans=mysql_real_escape_string($_GET['ans']);
$username=$_SESSION['user'];
//$ques=$_GET['$ques'];
$insa=" INSERT INTO answer(aemail,ans) VALUES('$username','$ans') " ;
if($conn->query($insa)){
echo"inserted";
echo"<script type='text/javascript'>".'alert("your answer is posted successfully");
</script>';
}
else{
echo"not inserted";
}
}
}
else{
echo"1";
}
$conn->close();
?>
我无法插入$ans中存储的值。
答案 0 :(得分：0)
<form method="get" action="insert.php?<?php echo "$ques='".$qres['ques']."'">
还有一件事，你的页面名称只是insert.php而不是insertA.php
答案 1 :(得分：0)
以下是您问题的更正解决方案。虽然我没有看到你的模式，但是看起来有点不对，因为你使用问题字段加入表格，根据你的问题可能是字符串数据类型。所以这是建议的数据库结构：
问题表：
DROP TABLE IF EXISTS `question`;
CREATE TABLE IF NOT EXISTS `question` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`title` varchar(50) NOT NULL,
`qemail` varchar(100) NOT NULL,
`que` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;
--
-- Dumping data for table `question`
--
INSERT INTO `question` (`id`, `title`, `qemail`, `que`) VALUES
(1, 'Physics', 'thanga@gmail.com', 'This is the quesiotn');
COMMIT;
答案表：
CREATE TABLE IF NOT EXISTS `answer` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`questionid` int(11) NOT NULL,
`aemail` varchar(100) NOT NULL,
`ans` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=7 DEFAULT CHARSET=latin1;
--
-- Dumping data for table `answer`
--
INSERT INTO `answer` (`id`, `questionid`, `aemail`, `ans`) VALUES
(1, 1, 'thanga@gmail.com', 'My answer is here'),
(2, 1, 'Khuskant', 'The new answer');
我们在答案表中添加问题ID，因为我们需要它来连接两个表。这意味着我们使用问题ID进行关系。
将search.php更改为：
<?php
session_start();
$_SESSION['user']='Khuskant'
?>
<html>
<head></head>
<body>
<?php
echo"WELCOME ".strtoupper($_SESSION['user']);
?>
<form method="get" action="searched.php">
<label for="ques"></label>
<input type="text" name="title" id="title" placeholder="Search...">
<button type="submit" name="search" value="token"><i class="fa fa-search"></i></button>
</form>
<form method="post" action="question.php">
<button type="submit" name="ask_ques">Ask a Question</button>
</form>
</body>
</html>
当您提交上述表单时，您可以转到question.php或searching.php，具体取决于数据库中搜索词的可用性。如果您希望将搜索项与存储在问题表中的确切数据进行匹配，则以下代码将执行以下操作： searched.php
<?php
session_start();
require_once "dbconnect.php";
?>
<html>
<head>
</head>
<body class="content">
<?php
if($_SERVER['REQUEST_METHOD']=='GET'){
if(isset($_GET['search'])){
$title= filter_var($_GET['title'],FILTER_SANITIZE_STRING);
$stmt = $conn->prepare("SELECT id, title, qemail, que
FROM question WHERE title=?");
$stmt->bind_param("s", $title);
$stmt->execute();
$result = $stmt->get_result();
if($result->num_rows==0){
header('location:question.php');
}else{
while ($qres = $result->fetch_array(MYSQLI_ASSOC)) {
echo "<strong>".ucfirst($qres['title'])."</strong><br><br>";
echo $qres['qemail']; ?>
<textarea cols="65" id="qdes"><?php echo $qres['que']; ?></textarea>
<?php
$qid = $qres['id'];
$aresult = $conn->query("SELECT answer.aemail, answer.ans
FROM question
LEFT JOIN answer ON question.id=answer.questionid
WHERE question.id=$qid");
if($aresult->num_rows>0){
while($ares = $aresult->fetch_assoc()){
echo"<br>Answer:"; ?>
<textarea cols="65" id="ades"><?php echo $ares['ans']; ?></textarea><br><br>
<?php } } ?>
<form method="get" action="insert.php">
<label for="ans"><?php echo $_SESSION['user'];?></label>
<textarea cols="90" name="ans" placeholder="Your Answer"></textarea>
<input type="hidden" name="qid" value="<?php echo $qid;?>">
<input type="submit" name="comment" value="submit">
</form>
<?php
}
}
}
} ?>
</body>
</html>
如果你想要部分匹配，你必须改变这部分代码：
$stmt = $conn->prepare("SELECT id, title, qemail, que
FROM question WHERE title=?");
$stmt->bind_param("s", $title);
到
$stmt = $conn->prepare("SELECT id, title, qemail, que
FROM question WHERE title LIKE ?");
$stmt->bind_param("s", $title."%");
将insert.php更改为：
<?php
session_start();
require 'dbconnect.php';
if($_SERVER['REQUEST_METHOD']=='GET'){
if(isset($_GET['comment'])){
$ans=filter_var($_GET['ans'], FILTER_SANITIZE_STRING);
$qid=filter_var($_GET['qid'], FILTER_SANITIZE_NUMBER_INT);
$username=$_SESSION['user'];
$insa= $conn->prepare("INSERT INTO answer(questionid, aemail, ans) VALUES(?,?,?)");
$insa->bind_param('iss', $qid, $username, $ans);
$insa->execute();
if($insa->affected_rows>0){
echo $insa->affected_rows." rows inserted";
exit;
} else{
echo"not inserted";
exit;
}
}
}
else{
echo "1";
}
$conn->close();
?>
dbconnect.php
$conn = new mysqli("localhost", "user", "pass", "testdb");
if ($conn->connect_errno) {
echo "Failed to connect to MySQL: " . $conn->connect_error;
}
将它们全部放在同一目录中，它会起作用。希望这会对你有所帮助。