在mysql_query字符串中使用PHP變量

Question

好，朋友們。 將PHP變量傳遞給mysql_query字符串時，我有一個復雜的問題。

$ _GET ['日期']; 傳遞時將包含類似：2015_01_07_1

我需要使用$ week變量將GET數據傳遞給表名。

<?php

    $week= $_GET['date'];

    $con=mysqli_connect("localhost","root","mypassword","beerhandpoker");
    // Check connection
        if (mysqli_connect_errno()) {
          echo "Failed to connect to MySQL: " . mysqli_connect_error();
        }

    $result = mysqli_query
    ($con,
        "SELECT games_brixx_gastonia_'$week'.rank, players_brixx_gastonia.name, games_brixx_gastonia_'$week'.points
        FROM games_brixx_gastonia_'$week', players_brixx_gastonia
        WHERE games_brixx_gastonia_'$week'.email = players.email
        ORDER BY games_brixx_gastonia_'$week'.rank
        LIMIT 20"
    );

    echo "<table>
        <tr>
        <th>Rank</th>
        <th>Name</th>
        <th>Points</th>
        </tr>";

    while($row = mysqli_fetch_array($result)) {
        echo "<tr>";
        echo "<td>" . $row['rank'] . "</td>";
        echo "<td>" . $row['name'] . "</td>";
        echo "<td>" . $row['points'] . "</td>";
        echo "</tr>";
    }

    echo "</table>";

    mysqli_close($con);
    ?>

Answer 1

將字符串文字更改為：

"SELECT games_brixx_gastonia_$week.rank,    
players_brixx_gastonia.name,games_brixx_gastonia_$week.points
FROM games_brixx_gastonia_$week, players_brixx_gastonia
WHERE games_brixx_gastonia_$week.email = players_brixx_gastonia.email
ORDER BY games_brixx_gastonia_$week.rank
LIMIT 20"

你必須刪除'字符; 它將作為games_brixx_gastonia_'2015_01_07_1'.rank進入db

Answer 2

你為什么單引號？ 它應該工作：

SELECT games_brixx_gastonia_{$week}.rank, players_brixx_gastonia.name, games_brixx_gastonia_{$week}.points
FROM games_brixx_gastonia_{$week}, players_brixx_gastonia
WHERE games_brixx_gastonia_{$week}.email = players.email
ORDER BY games_brixx_gastonia_{$week}.rank
LIMIT 20

無論如何，我寧願建議你使用聲明代替。 看看： http ： //php.net/manual/pt_BR/mysqli.prepare.php

Answer 3

只需刪除'字符。 否則，查詢將嘗試從表games_brixx_gastonia_'2015_01_07_1'獲取數據，而不是game_brixx_gastonia_2015_01_07_1。