Question

我正在创建一行“x5产品相关表”并使用MYSQLcode RAND生成RANDOM产品和使用id！='$ id'的异常子句 - 其中id是当前正在查看的现有产品。

但问题是所生成的所有产品图像都是相同的相似产品图像。任何人都可以对此有所了解吗？

Pic以便更好地参考：

include "MyOnlineStore/storescripts/connect_to_mysql.php";
$sql2          = mysql_query("SELECT * FROM bag WHERE id!='$id'ORDER BY RAND()LIMIT 5");
$productCount2 = mysql_num_rows($sql2); // count the output amount
if ($productCount2 > 0) {
    ?>
    <table border="1">
        <tr>    
    <?php
    while ($row2 = mysql_fetch_array($sql2)) {
        $idrelated    = $row2["id"];
        $imagerelated = $row2["image"];
        $titlerelated = $row2["title"];
    }
} else {
    echo "That item does not exist.";
    exit();
}
mysql_close();

HTML

<table border="1">
    <tr>
        <td>
            <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
            </a>
        </td>
        <td>
            <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
            </a>
        </td>
        <td>
            <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
            </a>
        </td>
        <td>
            <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
            </a>
        </td>
        <td>
            <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
            </a>
        </td>
    </tr>
</table>

Answer 1

您的代码应该是这样的

include "MyOnlineStore/storescripts/connect_to_mysql.php";
$sql2          = mysql_query("SELECT * FROM bag WHERE id!='$id'ORDER BY RAND()LIMIT 5");
$productCount2 = mysql_num_rows($sql2); // count the output amount
if ($productCount2 > 0) {
    ?>
    <table border="1">
        <tr>    
    <?php
    while ($row2 = mysql_fetch_array($sql2)) {
        $idrelated    = $row2["id"];
        $imagerelated = $row2["image"];
        $titlerelated = $row2["title"];
        ?>
            <td>
                <a href="http://example.net/product.php?id=<?php echo $idrelated; ?>">
                    <img src="admin/product/uploaded_files/<?php echo $imagerelated; ?>" width="100" height="100" alt="<?php echo $titlerelated; ?>" /> 
                </a>
            </td>
        <?php
    }
?>
         </tr>
    </table>

Answer 2

据我所知，您可以从代码中看到以下变量：

$idrelated, $imagerelated, $titlerelated

离开循环后

保持不变。因此，在每一行中，您都会引用相同的变量和值。

如果你想继续使用一些数组来保留所有五个值：

<?php 
$index = 0;
while (...) { 
   $relatedA[$index] = ...;
   $relatedB[$index] = ...;
   $relatedC[$index] = ...;
   $index++;
}
?>
...

<?php echo $relatedA[0]; ?>
<?php echo $relatedA[1]; ?>
...
<?php echo $relatedA[4]; ?>

最后你可以再次放入循环以避免冗余代码。

更新

尝试抵制将回声放入第一个获取值的循环的诱惑 - 因为它可能导致难以维护的意大利面条式代码（不幸的是在许多php源中很常见）。

在5的相关产品表中显示随机产品

2 个答案:

更新