2013-03-16 42 views
2

我有2頁sell.php和sell_form.php。當用戶從sell_form.php的下拉菜單中選擇一個股票代碼時,我在sell.php中有一個查詢,它應該從數據庫中刪除該股票代碼,但是我現在正在獲取的只是一個空白頁面我點擊賣按鈕。我不確定我完全理解下拉菜單中的值是如何傳遞給sell.php表單的。這是我的代碼至今無法刪除數據庫中的行php

這是我的sell.php文件

if ($_SERVER["REQUEST_METHOD"] == "POST") 
{ 



    // delete the stock from their portfolio 
query("DELETE FROM shares WHERE id = ? AND symbol = ?", $_SESSION["id"],$_POST["symbol"]); 

redirect("/"); 
} 
else 
{ 

$rows = query("SELECT * FROM shares WHERE id = ?", $_SESSION["id"]); 

    //create array to store the shares 
    $shares = []; 

    //for each of the user info 

    foreach($rows as $row){ 

     //lookup stock info 
     $stock = lookup($row["symbol"]); 
     if($stock !== false){ 

      $shares[] = [ 
       "name" => $stock["name"], 
       "price" => $stock["price"], 
       "shares" => $row["shares"], 
       "symbol" => $row["symbol"], 
       "total" => $row["shares"]*$stock["price"] 
      ]; 

     } 
    } 

// render portfolio 
render("sell_form.php", ["shares" => $shares, "title" => "Sell"]); 
} 

這是我sell_form.php

<form action="sell.php" method="post"> 
<fieldset>  
    <div class="control-group"> 

     <select name="symbol"> 
     <option value="blank"></option> 

     <?php foreach ($shares as $symbol):?> 
     <option value="symbol"><?= $symbol["symbol"]?></option> 
     <? endforeach ?> 
     </select>  

    </div> 
    <div class="control-group"> 
     <button type="submit" class="btn">Sell all shares</button> 
    </div> 
</fieldset> 
</form> 
+0

的投資組合從表時,空白頁顯示刪除? – 2013-03-16 18:08:22

+0

由於某種原因,符號未被傳遞給查詢,因此它仍然存在 – tironci 2013-03-16 18:10:55

+0

。如果我刪除了符號,那麼整個投資組合將根據用戶標識被刪除。 – tironci 2013-03-16 18:14:34

回答

5

我們認爲在sell_form.php,

<option value="symbol"><?= $symbol["symbol"]?></option> 

應更改爲

<option value="<?= $symbol["symbol"]?>"><?= $symbol["symbol"]?></option> 

其他明智的sell.php

delete語句作爲解釋 -

DELETE FROM shares WHERE id = <<Spefied User Id>> AND symbol = 'symbol'; 

Thnaks

+0

謝謝。就是這樣。 – tironci 2013-03-16 18:24:23