连接成功，但未将数据输入网站mysql

Question

我们正在尝试连接php和mysql，我们连接成功，但我们没有收到数据，任何想法，请指导

我们也使用mysql和php。

The Connection is Successful but nogetting the data into website

enter code here`Please let me know who to correct it<html>
<head>
<title> Welcome to PDM</title>
</head>
<body>
<div>
<centre>
Good For Checking The Prices
</centre>
<?php>` 


    $db_host = "localhost";
    $db_username = "wikiacwj_price";
    $db_pass = "";
    $db_name = "wikiacwj_price";

    mysql_connect("$db_host","$db_username","$db_pass") or die ("Please Try Again");
    mysql_select_db("wikiacwj_price") or die ("no data");

    $sql = mysql_query("SELECT * FROM price_comparsion where product_name='ok'");

    //write the results

    while ($row = mysql_fetch_array($sql)); {
    echo $row['product_name'];}

    ?>
    </body>
    </html>

Answer 1

while语句后面紧跟的分号告诉while循环...无:)

...
while ($row = mysql_fetch_array($sql)) {
  echo $row['product_name'];
}
...

我应该做这个戏法。