回声没有返回结果

Question

我有一些php代码，在那里我做了一些MySQL数据库的一些信息。当我运行我的代码时，我得到这个答案：“连接到MySQL”，但该页面不返回我的ID，名称和年份。任何人都可以看到这是为什么？

问候 的Mads

<?php 
//echo phpinfo(); 

$username = "root"; 
$password = "root"; 
$hostname = "127.0.0.1:8889"; 

//connection to the database 
$dbhandle = mysql_connect($hostname, $username, $password) 
or die("Unable to connect to MySQL"); 
echo "Connected to MySQL<br>"; 


//select a database to work with 
$selected = mysql_select_db("examples",$dbhandle) 
    or die("Could not select examples"); 

//execute the SQL query and return records 
$result = mysql_query("SELECT id, model, year FROM cars"); 

//fetch tha data from the database 
while ($row = mysql_fetch_array($result)) { 
    echo "ID:".$row{'id'}." Name:".$row{'model'}."Year: ".$row{'year'}."<br>"; //display the results 
} 
//close the connection 
mysql_close($dbhandle); 
?> 


CREATE DATABASE `examples`; 
USE `examples`; 
CREATE TABLE `cars` (
    `id` int UNIQUE NOT NULL, 
    `name` varchar(40), 
    `year` varchar(50), 
    PRIMARY KEY(id) 
); 
INSERT INTO cars VALUES(1,'Mercedes','2000'); 
INSERT INTO cars VALUES(2,'BMW','2004'); 
INSERT INTO cars VALUES(3,'Audi','2001'); 
INSERT INTO cars VALUES(4, 'Ferrari', '2013'); 
INSERT INTO cars VALUES(5, 'Lamborghini', '2012'); 
INSERT INTO cars VALUES(6, 'Mazda', '2010'); 

Answer 1

您已经使用大括号代替括号内以下行：

echo "ID:".$row{'id'}." Name:".$row{'model'}."Year: ".$row{'year'}."<br>"; //display the results 

将其更改为：

echo "ID:".$row['id']." Name:".$row['model']."Year: ".$row['year']."<br>"; //display the results 

Answer 2

找到了答案。我已经写了模型而不是名字:-)

<?php 
//echo phpinfo(); 

$username = "root"; 
$password = "root"; 
$hostname = "127.0.0.1:8889"; 

//connection to the database 
$dbhandle = mysql_connect($hostname, $username, $password) 
or die("Unable to connect to MySQL"); 
echo "Connected to MySQL<br>"; 


//select a database to work with 
$selected = mysql_select_db("examples",$dbhandle) 
    or die("Could not select examples"); 

//execute the SQL query and return records 
$result = mysql_query("SELECT id, name, year FROM cars"); 

//fetch tha data from the database 
while ($row = mysql_fetch_array($result)) { 
    echo "ID:".$row{'id'}." Name:".$row{'name'}."Year: ".$row{'year'}."<br>"; //display the results 
} 
//close the connection 
mysql_close($dbhandle); 
?>