php - 在 mysql_query 字符串中使用 PHP 变量

Question

好的伙计们。我在将 PHP 变量传递到 mysql_query 字符串时遇到了一个有点复杂的问题。

$_GET['日期'];通过时将包含类似:2015_01_07_1

我需要使用 $week 变量将 GET 数据传递到表名中。

<?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

将字符串文字更改为:

"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"

您必须删除 ' 字符；它将作为 games_brixx_gastonia_'2015_01_07_1'.rank

进入数据库