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php连接mysql数据库并查询记录所有记录

WBOY
WBOYOriginal
2016-05-24 18:31:042457browse

下面是一款简单的php操作数据库的程序,我们是先讲php连接mysql数据库,然后再执行sql查询语句再把我们要的记录显示出来,最后关闭与mysql数据库的连接,实例代码如下:

$host = 'localhost'; 
$user_name = 'root'; 
$password = 'admin'; 
$conn = mysql_connect($host,$user_name,$password); 
if(!$conn) 
{ 
    die('数据库连接失败:
'.mysql_error()); 
} 
echo '数据库连接成功!继续操作...'; 
mysql_select_db('test'); 
$sql = 'select id,name,city from users'; 
$result = mysql_query($sql); 
if($result) 
{ 
    echo 'sql语句:' . $sql . '已经成功执行!'; 
    $num = mysql_num_rows($result);    //调用函数mysql_num_row()获得select语句查询结果的行数 
    echo '该sql语句查询到'.$num.'www.phprm.com行数据'; 
}
if(mysql_close($conn)) 
{ 
    echo '
........
'; 
    echo '到数据库的连接已经成功关闭'; 
}


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