PHP基础------操作mysql函数

//连接数据库
function conn($dbhost,$dbuser,$dbpwd,$dbname)
{
$link = @mysql_connect($dbhost,$dbuser,$dbpwd) or die("连接数据库错误!".mysql_error());
mysql_select_db($dbname,$link);
mysql_query("set names utf8");
}
//执行sql语句
function query($sql)
{
return mysql_query($sql);
}

//返回记录数
function numRows($sql)
{
$result = mysql_query($sql);
return mysql_num_rows($result);
}

//获取一条信息,返回一维数组
function getOne($sql)
{
$result = mysql_query($sql);
return mysql_fetch_assoc($result);
}

//获取多条信息，返回多维数组
function getAll($sql)
{
$result = mysql_query($sql);
$rows = array();
while($rs = mysql_fetch_assoc($result))
{
$rows[] = $rs;
}
return $rows;
}

//关闭数据库
function close()
{
mysql_close();
}

<?php
$config = array(
'dbhost'=>'localhost',
'dbuser'=>'root',
'dbpwd'=>'',
'dbname'=>'myblog'
);