PHP - 从MySQL服务器检索数据

Question

有谁知道如何检索一段数据并在php文件中显示结果？ ，我会进入一个类似的查询是这样的：

SELECT 'email' FROM 'users' WHERE 'username' = 'bob' 

因此，其结果必然是刚刚的电子邮件。

感谢，

凯文

Answer 1

要连接

$con = mysql_connect("host","userName","passWord"); 
if (!$con){die('Could not connect: ' . mysql_error());} 
mysql_select_db("dbNameToSelect", $con); 

要查询

$result = mysql_query("SELECT `email` FROM `users` WHERE `username` = 'bob'"); 
while($row = mysql_fetch_array($result)){ 
    // do stuff with $row['colName'] 
} 

要关闭连接mysql_close($con);

Answer 2

见阿尔斯o：http://www.php.net/manual/en/mysqli.query.php 有几个很好的例子

Answer 3

您需要连接并从数据库中获取数据，如mysql。检查下面的代码：

$server = "localhost"; 
$username = "root"; 
$password = ""; 
$database = "mysampledb"; 

mysql_connect($server, $username, $password); 
mysql_select_db($database); 

$result = mysql_query("SELECT email FROM users WHERE username = 'bob'") or die(mysql_error()); 

while($row = mysql_fetch_assoc($result)) { 
    echo $row["email"]; 
}