Php 是否基于数组值选中复选框？

我目前有两个阵列，如下所示：

样例：

Array
(
    [0] => Array
        (
            [swatch_id] => 8
            [swatch_file] => orange_swatch.jpg
        )

    [1] => Array
        (
            [swatch_id] => 9
            [swatch_file] => pink_swatch.jpg
        )

    [2] => Array
        (
            [swatch_id] => 10
            [swatch_file] => green_swtach.jpg
        )

)

Array
(
    [0] => Array
        (
            [swatches_has_products_id] => 18
            [swatches_swatch_id] => 8
            [products_product_id] => 19
        )

    [1] => Array
        (
            [swatches_has_products_id] => 19
            [swatches_swatch_id] => 10
            [products_product_id] => 19
        )

)

选定样例：

Array
(
    [0] => Array
        (
            [swatches_has_products_id] => 18
            [swatches_swatch_id] => 8
            [products_product_id] => 19
        )

    [1] => Array
        (
            [swatches_has_products_id] => 19
            [swatches_swatch_id] => 10
            [products_product_id] => 19
        )

)

如果

$swatch['swatch\u id']

等于

$selected\u swatches['swatches\u swatch\u id']

，我试图选中一个复选框。我使用以下代码执行此操作：

<?php foreach ($swatches as $k => $swatch): ?>
    <li>
        <img src="<?php echo base_url(); ?>media/images/swatches/<?php echo $swatch['swatch_file']; ?>" height=""/>
        <input type="checkbox" name="product_has_swatch[]" value="<?php echo $swatch['swatch_id']; ?>" <?php    if($swatch['swatch_id'] == $selected_swatches[$k]['swatches_swatch_id']) : ?> checked="checked" <?php endif; ?> />
    </li>
<?php endforeach; ?>

---

第137行是检查是否有匹配项的

if

；我哪里出错了？

因为在选定的样例中没有索引2。。这就是为什么它会通知您。

一个解决方案是：

// make a new array of selected ids
$newArr = array();
foreach($selected_swatches as $val) {
    array_push($newArr, $val['swatches_swatch_id']);
}

// then check with in_array, like:
<?php foreach ($swatches as $k => $swatch): ?>
    <li>
        <img src="<?php echo base_url(); ?>media/images/swatches/<?php echo $swatch['swatch_file']; ?>" height=""/>
        <input type="checkbox" name="product_has_swatch[]" value="<?php echo $swatch['swatch_id']; ?>" <?php if(in_array($swatch['swatch_id'], $newArr)) : ?> checked="checked" <?php endif; ?> />
    </li>
<?php endforeach; >

//创建所选ID的新数组
$newArr=array（）；
foreach（$val为选定的样本）{
数组推送（$newArr，$val['swatches\u swatch\u id']）；
}
//然后检查in_数组，如：

媒体/图像/样本/“高度=”“/>
**看看这个，很好用**
$swatch=array（0=>array（'swatch\u id'=>8，'swatch\u file'=>'orange\u-swatch.jpg'），
1=>array（'swatch\u id'=>9，'swatch\u file'=>ping\u swatch.jpg'），
2=>array（'swatch\u id'=>10，'swatch\u file'=>'green\u swatch.jpg'）
);
$selected_-swatches=array（0=>array（'swatches_有_-products_-id'=>18，'swatches_-swatch-id'=>8，'products_-products_-id'=>19），
1=>array（'swatches\u拥有产品\u id'=>19，'swatches\u-swatch\u id'=>10，'products\u-product\u id'=>19），
);               
foreach（$k=>$swatch的样例）：
?>

**Check this out it works fine**

$swatches           = array( 0 =>array('swatch_id'=>8,'swatch_file'=>'orange_swatch.jpg'),
                             1 => array('swatch_id'=>9,'swatch_file'=>'ping_swatch.jpg'),
                             2 =>array('swatch_id'=>10,'swatch_file'=>'green_swatch.jpg')
                           );
$selected_swatches  = array( 0 =>array('swatches_has_products_id'=>18,'swatches_swatch_id'=>8,'products_product_id'=>19),
                             1 =>array('swatches_has_products_id'=>19,'swatches_swatch_id'=>10,'products_product_id'=>19),

                            );               

foreach($swatches as $k=>$swatch) :

    ?>

<li>

 <input type="checkbox" name="product_has_swatch" value="<?php echo $swatch['swatch_id'];?>"

 <?php 
      if($swatch['swatch_id'] == $selected_swatches[$k]['swatches_swatch_id']):
              echo "checked = 'checked'";
      endif;
  ?>


 />
</li>
<?php endforeach; ?>