php访问数据库的基本操作

$coon = mysql_connect("服务器","用户名","密码");

mysql_select_db("数据库","数据库连接");

$rs = mysql_query("sql语句","数据库连接");

while($row=mysql_fetch_row($rs){ echo $row[1];}   //ROW可以用数组下标获取数据集字段

while($row=mysql_fethc_array($rs)){echo $row[“username”];}   //ROW可以用字段名称和下标数

while($row = mysql_fetch_row($result))
{
echo $row['cid'].'::'.$row[1].'<br>';
}
$result = mysql_query($sql);
while($row = mysql_fetch_array($result))
{
echo $row['cid'].'::'.$row[1].'<br>';
}
$result = mysql_query($sql);
while($row = mysql_fetch_object($result))
{
echo $row->cid.'::'.$row->title.”<br>”;
}
$result = mysql_query($sql);
while($row = mysql_fetch_assoc($result))
{
echo $row['cid'].'::'.$row[1].'<br>';
}