php返回数组资料mysql_fetch_array()函数

$conn = mysql_connect("服务器名"，"用户名"，"密码");
mysql_select_db("数据库名", $conn);
$result = mysql_query("select * from table", $conn);
while($row = mysql_fetch_array($result)) {
echo $row["a_id"];
echo $row["a_name"];
}
mysql_free_result($result);
?>