MySQL：更改列中的值

Question

標題幾乎可以說明自己是誠實的。我試圖將我的刪除列從0更改爲1，具體取決於從我的列表播放器中選擇了哪個播放器。

我的listPlayers.php文件正在使用100％。球員在下拉菜單中顯示正常。 我應該補充說，錯誤發生在我的$ sql變量中。

<?php 
include 'dbconnect.php'; 
$sql = "UPDATE players SET Delete = 1 WHERE playersID = $_POST[playersIDHidden]"; 

if(! mysql_query($sql, $conn)) 
{ 
    echo "Error " . mysql_error(); 
} 

else 
{ 
    if(mysql_affected_rows() != 0) 
    { 
     echo $_POST[pName] . " has been deleted <br>"; 
     echo "Person ID: " . $_POST ['playersID'] . "<br>"; 
     echo "Players Name: " . $_POST ['pName'] . "<br>"; 

     echo "Deletion complete"; 
    } 

    else 
    { 
     echo "No records were changed"; 
    } 
} 

mysql_close($conn); 
?> 

<form action = "viewPlayers.php" method = "POST" /> 
    <input type = "submit" value = "View Players"> 
</form> 

最後我listPlayers.php是顯示我的球員的名字在下拉。

<?php 
include "dbconnect.php"; //Opening Database Connection 

$sql = "SELECT * FROM `players` WHERE `Delete` = 0;"; 

if (!$result = mysql_query($sql, $conn)) 
{ 
    die('Error in querying the database' . mysql_error()); 
} 

echo "<br><select name = 'listPersons' id = 'listPersons' onclick = 'populate()'>"; 

while ($row = mysql_fetch_array($result)) 
{ 
    $id = $row['playersID']; 
    $pName = $row['playersName']; 
    $dob = $row['playersDateOfBirth']; 
    $dob = date ("d-m-Y", strtotime($dob)); 

    $allText = "$id, $pName, $dob"; 
    echo "<option value = '$allText'> $pName </option>"; 
} 

echo "</select>"; 
mysql_close($conn); 
?> 

對不起，相對較長的職位。我通常能夠修復99％的未定義錯誤。這一個讓我失去了。

乾杯！

Answer 1

使用禁用的文本框爲用戶顯示它。

使用另一個隱藏字段來保存playersID。

用你的腳本填充它們，然後你可以在需要刪除時使用隱藏字段中的值。

爲清楚起見我展示你的HTML可能是什麼樣子 - 這裏的腳本：

<script> 
    function populate() 
    { 
     var select = document.getElementById("listPersons"); 
     var result = select.options[select.selectedIndex].value; 

     var personDetails = result.split(", "); 
     document.getElementById("playersID_display").value = personDetails[0]; 
     document.getElementById("playersID").value = personDetails[0]; 
     document.getElementById("pName_display").value = personDetails[1]; 
     document.getElementById("pName").value = personDetails[1]; 
.... 

和HTML：

<form name = "myForm" action = "deletePlayer.php" method = "POST">  
    <p> 
     <label for> Players ID: 
      <input type = "text" name = "playersID_display" id = "playersID_display" disabled/> 
      <input type = "hidden" name = "playersID" id = "playersID" /> 
     </label> 
    </p> 

    <p> 
     <label for> Players Name: 
      <input type = "text" name = "pName_display" id = "pName_display" disabled/> 
      <input type = "hidden" name = "pName" id = "pName" /> 
     </label> 
    </p> 

    <p> 
     <label for> Date of Birth: 
      <input type = "date" name = "DoB_display" id = "DoB_display" disabled/> 
      <input type = "hidden" name = "DoB" id = "DoB" /> 
     </label> 
    </p> 

    <input type = "Submit" value = "Delete" class = "button" onClick = "return confirm('Are you sure you want to delete this player?')"/> 

</form>  

注意，我一直保持着獨特的名字等領域以及HTML輸入元素的唯一ID。我也更喜歡type="hidden"，而不是把放在<input ... hidden />元素的末尾 - 我不熟悉那種語法，所以我使用我的首選方式。

很明顯，您的腳本將不得不單獨更新每個這些字段。