从mysql表中分隔逗号分隔值

时间:2012-03-28 11:21:06

标签: php mysql checkbox

我有一个表命名related_products,

其中 products_id是主要产品。

related_products_ids由与主要产品相关的产品ID组成。

--------------------------------------------
|   products_id   |   related_products_ids |
| -----------------------------------------
|    1            |  1,2,3,4,6,            |
| -----------------------------------------
|    2            |   1,2,3,                |
| -----------------------------------------
|    3            |   1,2,                  |
-------------------------------------------

我有复选框,

<input value="1" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 1
<input value="2" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 2
<input value="3" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 3
<input value="4" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 4
<input value="5" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 5 
<input value="6" type="checkbox" name="rp_product[]" id="in-category"> Microsoft IntelliMouse Pro 6

复选框由php生成,

    <?php
    echo '<div class="categorydiv"><div id="category-all" class="tabs-panel"><ul id="categorychecklist" class="list:category categorychecklist form-no-clear">';
    $rp_sql = "select products_id, products_name from ".TABLE_PRODUCTS_DESCRIPTION." order by products_id";
    $rp_1 = mysql_query($rp_sql);
    while($rp_2 = mysql_fetch_array($rp_1)) {
    echo "<li id=\"category-".$rp_2['products_id']."\" class=\"popular-category\"><label class=\"selectit\"><input value=\"".$rp_2['products_id']."\" type=\"checkbox\" name=\"rp_product[]\" id=\"in-category-1\"> ".$rp_2['products_name']."</label></li>";
    }
    mysql_free_result($rp_1);
    echo '</ul></div></div>';
    ?>

如何根据checked值向这些复选框添加related_products_ids。例如,我在产品ID 1中。

另一件事:我还想在产品页面中显示这些相关产品。怎么做? 例如,我在products_id为1的产品页面中,我想显示table_name1表格中的产品related_products_ids

更新 我已使用此代码显示数据

$sql = "SELECT related_products_ids FROM ".TABLE_RELATED_PRODUCTS." where products_id = '" . (int)$_GET["products_id"]."'";
$result = mysql_query($sql);
$row = mysql_fetch_array($result);
$lst_rp = explode(',', $row['related_products_ids']);
foreach($lst_rp as $rp_id) {
$res = "SELECT products_id, products_name FROM ".TABLE_PRODUCTS_DESCRIPTION." WHERE products_id='" . $rp_id . "'";
}
$result1 = mysql_query($res);
while($row1 = mysql_fetch_array($result1)) {
echo $row1['products_name'];
}

然而,它什么也没显示..

我的代码错了吗?

请帮助,因为我不知道该怎么做。 谢谢。

2 个答案:

答案 0 :(得分:1)

您的方法不是特别可扩展,当您达到每个10的幂时,相关产品数据的开销会增加。我建议您每个product_id有多行。然后,您可以使用in_array()来查找与产品相关的密钥是否在您现在拥有的结果中。

如果您坚持使用当前的方法,请查看explode(),它会将您的值完美地分离到一个数组中,然后您可以使用in_array(),如上所述。

答案 1 :(得分:0)

首先,您的复选框不应具有相同的ID。

做这样的事情:

foreach ($lst_product_ids as $product_id) {
    $checked = '';
    $lst_rel_prods = explode(',', $arr_related_product_ids[$product_id]);
    if (in_array($product_id, $lst_rel_prods)) 
        $checked = " checked";
    echo "<input value='" . $product_id . "' type='checkbox' name='rp_product[]'" . $checked . ">
}

显然,假设你有$ lst_product_ids = array(1,2,3,4,5,6)和$ arr_related_product_ids = array(1 =&gt;'1,2,3,4,6,',2 = &gt;等。)

更新: 将您的代码更改为此(编辑:在选择'related_products_ids'之后):

while($rp_2 = mysql_fetch_array($rp_1)) {
    $checked = '';
    $lst_rp = explode(',', $rp_2['related_products_ids']);
    if (in_array($rp_2['products_id'], $lst_rp)) $checked = " checked";
    echo "<li id=\"category-".$rp_2['products_id']."\" class=\"popular-category\"><label class=\"selectit\"><input value=\"".$rp_2['products_id']."\" type=\"checkbox\" name=\"rp_product[]\" id=\"\"" . $checked . "> ".$rp_2['products_name']."</label></li>";
}

但请记住也要为每个复选框使用不同的ID。

编辑:你还应该选择'related_products_ids':

$rp_sql = "select products_id, products_name, related_products_ids from ".TABLE_PRODUCTS_DESCRIPTION." order by products_id";

更新:要显示逗号分隔的ID的值,并使用当前(可能不灵活)存储逗号分隔关系的方法,您必须在while循环内部使用额外的foreach($lst_rp as $rp_id)循环,并且foreach循环为每个相关产品执行SQL选择,如

$query = "SELECT products_id, products_name FROM ".TABLE_PRODUCTS_DESCRIPTION." WHERE products_id=" . $rp_id;

更新:如果您有新问题,您应该发布一个新问题并链接到此问题作为参考,否则这可能会永远持续下去。

试试这段代码。如果您的产品ID是SQL int(),那么您不能在查询中使用引号:

$sql = "SELECT related_products_ids FROM ".TABLE_RELATED_PRODUCTS." where products_id = " . $_GET["products_id"];   // I MADE CHANGES HERE
$result = mysql_query($sql);
$row = mysql_fetch_assoc($result);   // I MADE A CHANGE HERE
$lst_rp = explode(',', $row['related_products_ids']);
foreach($lst_rp as $rp_id) {
    $query = "SELECT products_id, products_name FROM ".TABLE_PRODUCTS_DESCRIPTION." WHERE products_id=" . $rp_id;
    $result1 = mysql_query($res);    // THIS AND THE FOLLOWING MUST STAY INSIDE THE LOOP
    $row1 = mysql_fetch_assoc($result1);
    echo $row1['products_name'];
}