php - 使用 PHP 在编辑页面上使用组合框

Question

我有两个表，tblPlayer(PlayerID, PlayerName,PlayerTeam(int) ) 和 tblTeams (TeamID, TeamName)

在 PHP 页面上，我有一个函数来查找选定的播放器，函数如下，

function find_selected_player() {
    global $sel_player;
    if (isset($_GET['id'])) {
        $sel_player = get_player_by_id($_GET['id']);
    } else {
        $sel_player = NULL;
    }
}

我的其他功能如下，

function get_player_by_id($player_id) {
    global $conn;
    $query = "SELECT * ";
    $query .= "FROM tblPlayer ";
    $query .= "WHERE PlayerID =" . $player_id ." ";
    $query .= "LIMIT 1";
    $result_set = mysql_query($query, $conn);
    confirm_query($result_set);

    if ($player = mysql_fetch_array($result_set)) {
        return $player;
    } else {
        return NULL;
    }
}

因此，在要编辑的表单上，我可以获得所有值，例如

<input type="text" name="PlayerName" value="<?php echo $sel_player['PlayerName']; ?>" />

但是...:)当我尝试以相反的方式填充组合框时，我被困在那里。当添加一些东西时，这就像一个魅力，但 $sel_player['PlayerTeam'] 只给我 ID :(

<?php include "conn.php" ?>
<?php include "function.php" ?>
<?php find_selected_player() ?>
<h2>Edit: <?php echo $sel_player['PlayerName'] ." ". $sel_player['PlayerLname']; ?></h2>
<form action="player.php" method="post">
<table>
<tr>
   <td>Name: </td>
   <td><input type="text" name="PlayerName" value="<?php echo $sel_player['PlayerName']; ?>" /></td>
   </tr>
   <tr>
   <td>Lastname:</td>
   <td><input type="text" name="PlayerLname" value="<?php echo $sel_player['PlayerLname']; ?>" /></td>
   </tr>
   <tr>
   <td>Team:</td>
   <td>
        <?php
$sql = "SELECT TeamName, TeamID FROM tblTeam";
$result = mysql_query($sql);

echo '<select name="TeamName"><option>';
echo "Choose a team.</option>";
echo '<option selected>' . $sel_player['PlayerTeam']  . '</option>';
while ($row = mysql_fetch_array($result)) {
    $team_name= $row["TeamName"];
    $team_id = $row["TeamID"];
    echo "<option value=\"$team_id\">$team_name</option>";
}
echo "</select>";
        ?>
    </td>
   </tr>
   <tr>
       <td><input type="submit" name="submit" value="Save" /></td>
       <td align="right">&nbsp;</td>
   </tr>
   </table>
</form>
<?php ob_end_flush() ?>
<?php include ("footer.php") ?>

Answer 1

您应该更新代码以使用 MySQLi_* 或 PDO。我已经让你从这里开始了。尝试一下，看看它对您有何作用。

function getPlayerByID($pid = '')
{
    global $conn;

    if($pid == '')
        return false;

    $sql = mysql_query("SELECT * FROM tblPlayer WHERE PlayerID = '$pid'", $conn);
    $row = mysql_fetch_array($sql);

    if(mysql_num_rows($sql) == 1)
        return $row;
    else
        return false;
}

$id = isset($_GET['id']) ? $_GET['id'] : '';

$sel_player = getPlayerByID($id);

$sql = mysql_query("SELECT TeamName, TeamID FROM tblTeam");

$select = '<select name=""><option>Choose a Team</option>';

while($row = mysql_fetch_array($sql))
{
    $team_id = $row['TeamID'];
    $team_name = $row['TeamName'];

    $selected = $team_id == $sel_player['PlayerTeam'] ? 'selected' : '';

    $select .= '<option ' . $selected . ' value="' . $team_id . '">' . $team_name . '</option>';
}

$select .= '</select>';

echo $select;