爲什麼我的php代碼編輯mySQL表格顯示爲空白頁面？

我在一個mysql記錄表的末尾有一個編輯按鈕，它在網頁中顯示。爲什麼我的php代碼編輯mySQL表格顯示爲空白頁面？

然而，當我點擊編輯按鈕時，我的edit.php只是生成一個空白頁面。

我想不通爲什麼：

<?php 
// contact to database 
$connect = mysql_connect("localhost", "xxx", "xxx") or die ("Error , check your server connection."); 
mysql_select_db("xxx"); 
?> 

<?php 
$posted_id = $_POST['ID']; 
?> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Untitled Document</title> 
</head> 

<body> 

<div class="form">    
<?php 

$result = mysql_query("SELECT * FROM ff_projections WHERE ID = '$posted_id'") or die ("Error in query"); 
if ($row = mysql_fetch_array($result)) { 

echo "<form method='post' action='update.php'>"; 
echo "<label for='Player'>Player Name:</label> <input type='text' name='Player' value='" . $row['Player'] . "' />"; 
echo "<label for='Pass_Yds'>Pass Yds:</label> <input class='short' type='text' name='Pass_Yds' value='" . $row['Pass_Yds'] . "' />"; 
echo "<label for='Pass_TDs'>Pass TDs:</label> <input class='short' type='text' name='Pass_TDs' value='" . $row['Pass_TDs'] . "' />"; 
echo "<label for='Int_Thrown'>Int Thrown:</label> <input class='short' type='text' name='Int_Thrown' value='" . $row['Int_Thrown'] . "' />"; 
echo "<label for='Rush_Yds'>Rush Yds:</label> <input class='short' type='text' name='Rush_Yds' value='" . $row['Rush_Yds'] . "' />"; 
echo "<label for='Rush_TDs'>Rush TDs:</label> <input class='short' type='text' name='Rush_TDs' value='" . $row['Rush_TDs'] . "' />"; 
echo "<input type='submit' name='submit' value='Update Player' />"; 
echo "<input type='hidden' name='ID' value='" . $row['ID'] . "' />"; 
echo "</form>"; 
} 
?> 
</div> 


</body> 
</html>

我有ID作爲隱藏字段，因爲我不希望它可見或編輯。

下面是一個使用edit.php頁：

<?php 
// contact to database 
$connect = mysql_connect("localhost", "xxx", "xxx") or die ("Error , check your server connection."); 
mysql_select_db("xxx"); 
?> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Kick Ass Fantasy Football Projections</title> 
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> 
<script type="text/javascript"> 

$(document).ready(function() { 

    $(".tab_content").hide(); 
    $(".tab_content:first").show(); 

    $("ul.tabs li").click(function() { 
     $("ul.tabs li").removeClass("active"); 
     $(this).addClass("active"); 
     $(".tab_content").hide(); 
     var activeTab = $(this).attr("rel"); 
     $("#"+activeTab).fadeIn(); 
    }); 
}); 

</script> 
</head> 

<body> 

<div> 
<FORM METHOD="LINK" ACTION="index.php" style="margin:10px 0px"> 
<INPUT TYPE="submit" VALUE="Add More Players" style="padding:6px"> 
</FORM> 
</div> 

<ul class="tabs"> 
    <li class="active" rel="tab1"> QB</li> 
    <li rel="tab2"> RB</li> 
    <li rel="tab3"> WR</li> 
    <li rel="tab4"> TE</li> 
    <li rel="tab5"> K</li> 
    <li rel="tab6"> Def/ST</li> 
</ul> 

<div class="tab_container"> 
    <div id="tab1" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td style="text-align:left ; width:175px">Player Name</td> 
    <td>Team</td> 
    <td>Pass Yds</td> 
    <td>Pass TDs</td> 
    <td>Int Thrown</td> 
    <td>Rush Yds</td> 
    <td>Rush TDs</td> 
    <td>TFP</td> 
    <td>Edit Player</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Player, Team, Pass_Yds, Pass_TDs, Int_Thrown, Rush_Yds, Rush_TDs, Total_Fantasy_Pts, ID FROM ff_projections WHERE Position = 'QB' ORDER BY Pass_Yds DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td style=\"text-align:left\">{$row['Player']}</td>"; 
    echo "<td>{$row['Team']}</td>"; 
    echo "<td>{$row['Pass_Yds']}</td>"; 
    echo "<td>{$row['Pass_TDs']}</td>"; 
    echo "<td>{$row['Int_Thrown']}</td>"; 
    echo "<td>{$row['Rush_Yds']}</td>"; 
    echo "<td>{$row['Rush_TDs']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td>"; 
    echo "<td>{$row['ID']}</td>"; 
    echo "<td><form action=\"edit.php\" method=\"post\"><input type=\"submit\" name=\"submit\" value=\"Edit\"></form></td></tr>"; 
    } 
    ?> 
    </table> 

    </div> 
</div>  

<div class="tab_container"> 
    <div id="tab2" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td style="width:175px ; text-align:left">Player Name</td> 
    <td>Team</td> 
    <td>Rush Yds</td> 
    <td>Rush TDs</td> 
    <td>Rec Yds</td> 
    <td>Rec TDs</td> 
    <td>Rec</td> 
    <td>Fumbles</td> 
    <td>TFP</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Player, Team, Rush_Yds, Rush_TDs, Rec_Yds, Rec_TDs, Receptions, Fumbles, Total_Fantasy_Pts FROM ff_projections WHERE Position = 'RB' ORDER BY Rush_Yds DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td style=\"text-align:left\">{$row['Player']}</td>"; 
    echo "<td>{$row['Team']}</td>"; 
    echo "<td>{$row['Rush_Yds']}</td>"; 
    echo "<td>{$row['Rush_TDs']}</td>"; 
    echo "<td>{$row['Rec_Yds']}</td>"; 
    echo "<td>{$row['Rec_TDs']}</td>"; 
    echo "<td>{$row['Receptions']}</td>"; 
    echo "<td>{$row['Fumbles']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td></tr>"; 
    } 
    ?> 
    </table>  

    </div> 
</div> 

<div class="tab_container"> 
    <div id="tab3" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td style="width:175px ; text-align:left">Player Name</td> 
    <td>Team</td> 
    <td>Rec Yds</td> 
    <td>Rec TDs</td> 
    <td>Rec</td> 
    <td>Fumbles</td> 
    <td>TFP</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Player, Team, Rec_Yds, Rec_TDs, Receptions, Fumbles, Total_Fantasy_Pts FROM ff_projections WHERE Position = 'WR' ORDER BY Rec_Yds DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td style=\"text-align:left\">{$row['Player']}</td>"; 
    echo "<td>{$row['Team']}</td>"; 
    echo "<td>{$row['Rec_Yds']}</td>"; 
    echo "<td>{$row['Rec_TDs']}</td>"; 
    echo "<td>{$row['Receptions']}</td>"; 
    echo "<td>{$row['Fumbles']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td></tr>"; 
    } 
    ?> 
    </table>  

    </div> 
</div> 

<div class="tab_container"> 
    <div id="tab4" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td style="width:175px ; text-align:left">Player Name</td> 
    <td>Team</td> 
    <td>Rec Yds</td> 
    <td>Rec TDs</td> 
    <td>Rec</td> 
    <td>Fumbles</td> 
    <td>TFP</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Player, Team, Rec_Yds, Rec_TDs, Receptions, Fumbles, Total_Fantasy_Pts FROM ff_projections WHERE Position = 'TE' ORDER BY Rec_Yds DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td style=\"text-align:left\">{$row['Player']}</td>"; 
    echo "<td>{$row['Team']}</td>"; 
    echo "<td>{$row['Rec_Yds']}</td>"; 
    echo "<td>{$row['Rec_TDs']}</td>"; 
    echo "<td>{$row['Receptions']}</td>"; 
    echo "<td>{$row['Fumbles']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td></tr>"; 
    } 
    ?> 
    </table>  

    </div> 
</div> 

<div class="tab_container"> 
    <div id="tab5" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td style="text-align:left ; width:175px">Player Name</td> 
    <td>Team</td> 
    <td>FG</td> 
    <td>Extra Pts</td> 
    <td>TFP</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Player, Team, FG, Extra_Pts, Overall_Pts, Total_Fantasy_Pts FROM ff_projections WHERE Position = 'K' ORDER BY FG DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td style=\"text-align:left\">{$row['Player']}</td>"; 
    echo "<td>{$row['Team']}</td>"; 
    echo "<td>{$row['FG']}</td>"; 
    echo "<td>{$row['Extra_Pts']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td></tr>"; 
    } 
    ?> 
    </table>  

    </div> 
</div> 

<div class="tab_container"> 
    <div id="tab6" class="tab_content"> 

    <table cellspacing="0" cellpadding="5" border="1" width="560"> 
    <tr style="text-align:center"> 
    <td>Team</td> 
    <td>Sacks</td> 
    <td>Int</td> 
    <td>Def TD</td> 
    <td>ST TD</td> 
    <td>Shutouts</td> 
    <td>TFP</td> 
    </tr> 
    <?php 
    $result = mysql_query("SELECT Team, Sacks, Int_Caught, Def_TD, ST_TD, Shutouts, Total_Fantasy_Pts FROM ff_projections WHERE Position = 'Def/ST' ORDER BY Def_TD DESC;"); 

    while($row = mysql_fetch_array($result)) 
    { 
    echo "<tr style=\"text-align:center\"><td>{$row['Team']}</td>"; 
    echo "<td>{$row['Sacks']}</td>"; 
    echo "<td>{$row['Int_Caught']}</td>"; 
    echo "<td>{$row['Def_TD']}</td>"; 
    echo "<td>{$row['ST_TD']}</td>"; 
    echo "<td>{$row['Shutouts']}</td>"; 
    echo "<td>{$row['Total_Fantasy_Pts']}</td></tr>"; 
    } 
    ?> 
    </table>  

    </div> 
</div>  


</body> 
</html>

來源

2012-06-05 Cynthia

你應該從上面的帖子中刪除你的密碼。然後啓用error_reporting，並在您獲得空白頁面時查看您的webservers error.log。 – mario

[PHP生產服務器 - 打開錯誤消息]的可能重複（http://stackoverflow.com/questions/1824282/php-production-server-turn-on-error-messages） – 2012-06-05 01:58:16

也驗證查詢實際返回一些數據。爲什麼通過echo語句生成所有的HTML？更容易維護，如果你只是將一些PHP放入HTML中。 – Marvo

千萬不要忘記正確消毒觸摸你的數據庫中的任何條目「mysql_real_escape_string（）;

但是似乎它的抱怨未定義的索引$ _POST ['ID'] ;,它的原因是要麼沒有發送到它，要麼可能有一個命名問題被張貼到該頁面

嘗試將其中一個值的靜態變量設置爲$ posted_id： $ pos ted_id = 3262732（或已知的帖子ID）查看您的表單是否正確返回。

如果確實有效，請查看要發佈到edit.php的數據。

來源

2012-06-05 02:12:27 Krazybean

我編輯了我的原始問題，包括髮布到edit.php的文件中的代碼... – Cynthia

所以除非我錯過了一些東西，這部分： 'echo「

」;' 沒有任何元素傳遞給除submit之外的edit.php，嘗試設置一個表示要修改/更新的數據的表單元素，'' – Krazybean

爲什麼我的php代碼編輯mySQL表格顯示爲空白頁面？

回答

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