3

澄清我的数据库称为数据库，我的表称为表（这是用于测试）。

  class Database 
{ 
 public $server = "localhost";
 public $database = "database"; 
 public $user = "root"; 
 public $password = ""; 
 public $row;
 public $result;



 //call connection method upon constructing 
 public function __construct(){
  $this->createConnection(); 
 }

 //connection to the database
 public function createConnection() 
    { 
     $this->dbLocalhost = mysql_connect($this->server, $this->user, $this->password)
                or die("could not connect:".mysql_error());

        mysql_select_db($this->database)
        or die("Could not find the database: ".mysql_error());
 } 

 //execute query string 
 public function query($queryString) 
    {

        echo "<table border='1' cellpadding='10'>";
        echo "<tr> <th>ID</th> <th>First Name</th> <th>Last Name</th> <th></th> <th></th></tr>";
        $this->result = mysql_query($queryString)
        or die($queryString."<br/><br/>".mysql_error());

        while($this->row = mysql_fetch_array($this->result)) {

                echo "<tr>";
                echo '<td>' . $this->row['id'] . '</td>';
                echo '<td>' . $this->row['firstname'] . '</td>';
                echo '<td>' . $this->row['lastname'] . '</td>';
                echo '<td><a href="edit.php?id=' . $this->row['id'] . '">Edit</a></td>';
                echo '<td><a href="delete.php?id=' . $this->row['id'] . '">Delete</a></td>';
                echo "</tr>"; 

        } 

        echo "</table>";
    }

然后我有调用函数的php文件。

<?php

include('database.php');
$db = new Database();
$sql = "SELECT * 
    FROM table"; 
$db->query($sql);

?>

这是接收的错误：

选择 * 从表

您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以在第 2 行的“表”附近使用正确的语法

谢谢。

4

1 回答 1

2

table is a reserved word in MySQL, so you must escape it. You can do that by putting `s around it.

For example:

SELECT * FROM `table`

As you can see on my link, there are several tricky reserved words that can cause a lot of headache. Some say you should always use ` characters when you write table and field names.

于 2012-11-11T23:54:56.967 回答