使用PHP更新数据库中的多行，但只更新前三行

在我的网站中，我从数据库检索信息，使用表单操作信息，然后用新信息更新数据库中各自的行。我对20行这样做，使用相同的代码，禁止每个变量名称(或我认为)，尽管只有数据库中的前3行被更新。

下面是前4行的html表单:

<form name="bpl_scores" action="db_scores_bpl.php" method="post">
    Arsenal <br>
  <label>
    <input type="radio" name="arsenal" value="arsenal_win" id="arsenal_win" checked>
    Win</label>
  <br>
  <label>
    <input type="radio" name="arsenal" value="arsenal_draw" id="arsenal_draw">
    Draw</label>
  <br>
  <label>
    <input type="radio" name="arsenal" value="arsenal_lose" id="arsenal_lose">
    Lose</label>
  <br>
  <br>
    Aston Villa <br>
  <label>
    <input type="radio" name="astonvilla" value="astonvilla_win" id="astonvilla_win" checked>
    Win</label>
  <br>
  <label>
    <input type="radio" name="astonvilla" value="astonvilla_draw" id="astonvilla_draw">
    Draw</label>
  <br>
  <label>
    <input type="radio" name="astonvilla" value="astonvilla_lose" id="astonvilla_lose">
    Lose</label>
  <br>
  <br>
    Burnley <br>
  <label>
    <input type="radio" name="burnley" value="burnley_win" id="burnley_win" checked>
    Win</label>
  <br>
  <label>
    <input type="radio" name="burnley" value="burnley_draw" id="burnley_draw">
    Draw</label>
  <br>
  <label>
    <input type="radio" name="burnley" value="burnley_lose" id="burnley_lose">
    Lose</label>
  <br>
  <br>
    Chelsea <br>
  <label>
    <input type="radio" name="chelsea" value="chelsea_win" id="chelsea_win" checked>
    Win</label>
  <br>
  <label>
    <input type="radio" name="chelsea" value="chelsea_draw" id="chelsea_draw">
    Draw</label>
  <br>
  <label>
    <input type="radio" name="chelsea" value="chelsea_lose" id="chelsea_lose">
    Lose</label>
  <br>
  <br>
    Crystal Palace <br>
  <label>
    <input type="radio" name="crystalpalace" value="crystalpalace_win" id="crystalpalace_win" checked>
    Win</label>
  <br>
  <label>
    <input type="radio" name="crystalpalace" value="crystalpalace_draw" id="crystalpalace_draw">
    Draw</label>
  <br>
  <label>
    <input type="radio" name="crystalpalace" value="crystalpalace_lose" id="crystalpalace_lose">
    Lose</label>
<input name="submit" type="submit" id="submit" formaction="db_scores_bpl.php" value="Submit">
</form>

以下是db_scores_bpl.php页面前4行的php代码:

<?php
$conn = mysqli_connect ('localhost','root','pass','database');
$sql = "SELECT * FROM bpl_teams WHERE team='Arsenal' LIMIT 1";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$arsenal_wins = $row['wins'];
$arsenal_draws = $row['draws'];
$arsenal_losses = $row['losses'];
$arsenal_score = $row['points'];
$arsenal_played = $row['played'];
$arsenal = $_POST['arsenal'];
if ($arsenal == "arsenal_win") {
    $arsenal_score = $arsenal_score + 3;
    $arsenal_wins = $arsenal_wins + 1;
    $arsenal_played = $arsenal_played + 1;
    $sql = "UPDATE bpl_teams SET played='$arsenal_played', wins='$arsenal_wins', points='$arsenal_score' WHERE team = 'Arsenal'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
elseif ($arsenal == "arsenal_draw") {
    $arsenal_score = $arsenal_score + 1;
    $arsenal_draws = $arsenal_draws + 1;
    $arsenal_played = $arsenal_played + 1;
    $sql = "UPDATE bpl_teams SET played='$arsenal_played', draws='$arsenal_draws', points='$arsenal_score' WHERE team = 'Arsenal'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
else {
    $arsenal_losses = $arsenal_losses + 1;
    $arsenal_played = $arsenal_played + 1;
    $sql = "UPDATE bpl_teams SET played='$arsenal_played', losses='$arsenal_losses' WHERE team = 'Arsenal'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
$conn = mysqli_connect ('localhost','root','pass','database');
$sql = "SELECT * FROM bpl_teams WHERE team='Aston Villa' LIMIT 1";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$astonvilla_wins = $row['wins'];
$astonvilla_draws = $row['draws'];
$astonvilla_losses = $row['losses'];
$astonvilla_score = $row['points'];
$astonvilla_played = $row['played'];    
$astonvilla = $_POST['astonvilla'];
if ($astonvilla == "astonvilla_win") {
    $astonvilla_score = $astonvilla_score + 3;
    $astonvilla_wins = $astonvilla_wins + 1;
    $astonvilla_played = $astonvilla_played + 1;
    $sql = "UPDATE bpl_teams SET played='$astonvilla_played', wins='$astonvilla_wins', points='$astonvilla_score' WHERE team = 'Aston Villa'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
elseif ($astonvilla == "astonvilla_draw") {
    $astonvilla_score = $astonvilla_score + 1;
    $astonvilla_draws = $astonvilla_draws + 1;
    $astonvilla_played = $astonvilla_played + 1;
    $sql = "UPDATE bpl_teams SET played='$astonvilla_played', draws='$astonvilla_draws', points='$astonvilla_score' WHERE team = 'Aston Villa'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
else {
    $astonvilla_losses = $astonvilla_losses + 1;
    $astonvilla_played = $astonvilla_played + 1;
    $sql = "UPDATE bpl_teams SET played='$astonvilla_played', losses='$astonvilla_losses' WHERE team = 'Aston Villa'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
$conn = mysqli_connect ('localhost','root','pass','database');
$sql = "SELECT * FROM bpl_teams WHERE team='Burnley' LIMIT 1";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$burnley_wins = $row['wins'];
$burnley_draws = $row['draws'];
$burnley_losses = $row['losses'];
$burnley_score = $row['points'];
$burnley_played = $row['played'];   
$burnley = $_POST['burnley'];
if ($burnley == "burnley_win") {
    $burnley_score = $burnley_score + 3;
    $burnley_wins = $burnley_wins + 1;
    $burnley_played = $burnley_played + 1;
    $sql = "UPDATE bpl_teams SET played='$burnley_played', wins='$burnley_wins', points='$burnley_score' WHERE team = 'Burnley'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
elseif ($burnley == "burnley_draw") {
    $burnley_score = $burnley_score + 1;
    $burnley_draws = $burnley_draws + 1;
    $burnley_played = $burnley_played + 1;
    $sql = "UPDATE bpl_teams SET played='$burnley_played', draws='$burnley_draws', points='$burnley_score' WHERE team = 'Burnley'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
else {
    $burnley_losses = $burnley_losses + 1;
    $burnley_played = $burnley_played + 1;
    $sql = "UPDATE bpl_teams SET played='$burnley_played', losses='$burnley_losses' WHERE team = 'Burnley'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
$conn = mysqli_connect ('localhost','root','pass','database');
$sql = "SELECT * FROM bpl_teams WHERE team='Chelsea' LIMIT 1";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$chelsea_wins = $row['wins'];
$chelsea_draws = $row['draws'];
$chelsea_losses = $row['losses'];
$chelsea_score = $row['points'];
$chelsea_played = $row['played'];   
$chelsea = $_POST['chelsea'];
if ($chelsea == 'chelsea_win') {
    $chelsea_score = $chelsea_score + 3;
    $chelsea_wins = $chelsea_wins + 1;
    $chelsea_played = $chelsea_played + 1;
    $sql = "UPDATE bpl_teams SET played='chelsea_played', wins='chelsea_wins', points='chelsea_score' WHERE team = 'Chelsea'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();

}
elseif ($chelsea == 'chelsea_draw') {
    $chelsea_score = $chelsea_score + 1;
    $chelsea_draws = $chelsea_draws + 1;
    $chelsea_played = $chelsea_played + 1;
    $sql = "UPDATE bpl_teams SET played='chelsea_played', draws='chelsea_draws', points='chelsea_score' WHERE team = 'Chelsea'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
else {
    $chelsea_losses = $chelsea_losses + 1;
    $chelsea_played = $chelsea_played + 1;
    $sql = "UPDATE bpl_teams SET played='chelsea_played', losses='chelsea_losses' WHERE team = 'Chelsea'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
$conn = mysqli_connect ('localhost','root','pass','database');
$sql = "SELECT * FROM bpl_teams WHERE team='Crystal Palace' LIMIT 1";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$crystalpalace_wins = $row['wins'];
$crystalpalace_draws = $row['draws'];
$crystalpalace_losses = $row['losses'];
$crystalpalace_score = $row['points'];
$crystalpalace_played = $row['played']; 
$crystalpalace = $_POST['crystalpalace'];
if ($crystalpalace == 'crystalpalace_win') {
    $crystalpalace_score = $crystalpalace_score + 3;
    $crystalpalace_wins = $crystalpalace_wins + 1;
    $crystalpalace_played = $crystalpalace_played + 1;
    $sql = "UPDATE bpl_teams SET played='crystalpalace_played', wins='crystalpalace_wins', points='crystalpalace_score' WHERE team = 'Crystal Palace'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
elseif ($crystalpalace == 'crystalpalace_draw') {
    $crystalpalace_score = $crystalpalace_score + 1;
    $crystalpalace_draws = $crystalpalace_draws + 1;
    $crystalpalace_played = $crystalpalace_played + 1;
    $sql = "UPDATE bpl_teams SET played='crystalpalace_played', draws='crystalpalace_draws', points='crystalpalace_score' WHERE team = 'Crystal Palace'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
else {
    $crystalpalace_losses = $crystalpalace_losses + 1;
    $crystalpalace_played = $crystalpalace_played + 1;
    $sql = "UPDATE bpl_teams SET played='crystalpalace_played', losses='crystalpalace_losses' WHERE team = 'Crystal Palace'";
    $result = mysqli_query($conn, $sql);
    mysqli_close();
}
?>

注意:我相信有一种更有效的方法来做上面的事情，但这是有效的(大多数)，所以我不是在寻找如何更有效地做到这一点的建议。

那么问题是为什么只有前3行更新成功?

提前感谢。为堆积如山的代码道歉。