我的表類有這些列:存儲數據庫值到變量
idcategory categorySubject users_idusers
我有一個簡單的單選按鈕和文本框的形式。 我有類別全選語句,並需要獲得idcategory存儲到一個變量($ getCatId),所以我可以用這個語句:
$sql="INSERT INTO topic(subject, topicDate, users_idusers, category_idcategory, category_users_idusers) VALUES('($_POST[topic])', '$date', '$_SESSION[userid]', '$getCatId', '$_SESSION[userid]');";
是什麼,以獲得最佳的方式和存儲類別ID?
if($_SERVER['REQUEST_METHOD'] != 'POST') //show form if not posted
{
$sql = "SELECT * FROM category;";
$result = mysqli_query($conn,$sql);
?>
<form method="post" action="createTopic.php">
Choose a category:
</br>
</br>
<?php
while ($row = mysqli_fetch_assoc($result)) {
echo "<div class= 'choice'><input type='radio' name='category' value='". $row['idcategory'] . "'>" . $row['categorySubject'] ."</div></br>";
}
echo 'Topic: <input type="text" name="topic" minlength="3" required>
</br></br>
<input type="submit" value="Add Topic" required>
</form>';
}
if ($_POST){
if(!isset($_SESSION['signedIn']) && $_SESSION['signedIn'] == false)
{
echo 'You must be signed in to contribute';
}
else{
$sql="INSERT INTO topic(subject, topicDate, users_idusers, category_idcategory, category_users_idusers) VALUES('($_POST[topic])', '$date', '$_SESSION[userid]', '$getCatId', '$_SESSION[userid]');";
$result = mysqli_query($conn,$sql);
echo "Added!";
** WARNING **:當使用'mysqli'你應該使用[參數化查詢(http://php.net/manual/en/mysqli.quickstart.prepared-statements.php)和['bind_param'](http://php.net/manual/en/mysqli-stmt.bind-param.php)將用戶數據添加到您的查詢中。 **不要**使用字符串插值或連接來完成此操作,因爲您創建了嚴重的[SQL注入漏洞](http://bobby-tables.com/)。 **絕不**將'$ _POST'或'$ _GET'數據直接放入查詢中,如果有人試圖利用您的錯誤,這會非常有害。 – tadman