使用PHP＆MySQLi从所有表中选择数据

Question

我正在尝试使用MySQLi从属于特定数据库的所有表中选择所有数据。

所以，我正在寻找类似SELECT * FROM *东西

我有以下（很棒的）代码，但是它不起作用。 有人可以启发我吗？

<h1>All posts</h1>
<?php
$servername = "localhost";
$username = "Masa";
$password = "passwdhere";
$dbname = "forums";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
} 

$sql = "SELECT * FROM *";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
     while($row = $result->fetch_assoc()) {
         echo '<h3>' . $row["title"] . '</h3><br><br><p>' . $row["text"] . '</p><br> <h4>Answers</h4><br><p>' . $row["answer"] .'</p><br> <form method = "post"><label for = "answer">Post your answer</label><br><textarea class = "answer" id = "answer" name = "answer" requred maxlength="10000" ></textarea><br><input type = "submit" class = "submit" name = "submit" id = "submit" value = "Answer"></form><br> <hr style="width: 650px; max-width: 100%; color: #eee;"><br><br> ';//I know, don't print HTML tags :3
     }
} else {
     echo "No posts yet! :c";
}

$conn->close();
?> 

Answer 1

您想使用show tables; -话虽如此，我建议您阅读MySQL文档或教程，这确实是基础知识。 我敢肯定，仅搜索SO也会给您答案。