Question

我有一些PHP代码，我已经用一些信息创建了一个MySQL数据库。当我运行我的代码时，我得到了这个答案：＆＃34;连接到MySQL＆＃34;，但该页面不会返回我的ID，名称和年份。任何人都能明白为什么会这样吗？

最诚挚的问候 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

您在以下行中使用了大括号而不是括号：

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

找到答案。我写的是模型而不是名字： - ）

<?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);
?>

echo不返回结果

2 个答案: