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php根据参数从读取数据库记录

May 24, 2016 pm 06:31 PM

这是一款php 读取数据库记录,只是我们更深层的作了处理,就是把用户url地址栏传过来的参数再从数据库中查询了,如用户登陆,注册,增加记录,新闻显示都会用到,代码如下:

$host = 'localhost'; 
$user_name = 'root'; 
$password = 'admin'; 
$id = $_get['id']; 
$conn = mysql_connect($host,$user_name,$password); 
if(!$conn) 
{ 
    die('数据库连接失败:'.mysql_error()); 
} 
mysql_select_db('test'); 
$sql = 'select id,name,city from users where id='.$id; 
$result = mysql_query($sql) or die("<br/>error: <b>".mysql_error()."</b><br/>产生问题的sql:".$sql); 
if($num = mysql_num_rows($result)) 
{ 
    echo &#39;<pre class="brush:php;toolbar:false">&#39;; 
    while($row = mysql_fetch_array($result,mysql_assoc)) 
    {
        print_r($row); 
    } 
} 
else 
{ 
 echo &#39;你要查询的数据己经学存在了&#39;; 
} 
mysql_close($conn);
Copy after login

查询id=2的记录

                           


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