如何循环遍历这个二维数组？ [重复]

Question

嗯，我对 PHP 数组的使用相对较新，我有以下数组，我需要循环遍历该数组，2280 和 2307 是标识符。

我发现很难想出一个收集所有数据的 foreach() 。

Array
(
[2280] => Array
    (
        [0] => http://deals.com.au//uploads/deal_image/2706.jpg
        [1] => Yuan's Massage and Beauty
        [2] => Get Hair Free in CBD! Only $99 for SIX MONTHS worth of the latest in IPL Permanent Hair Reduction. Choose which area you want treated! Valued at $900 from Yuan's Massage and Beauty in the Heart of Melbourne's CBD. Limited vouchers available
        [3] => 99
        [4] => 900
        [5] => 801
        [6] => http://deals.com.au/1827
    )

[2307] => Array
    (
        [0] => http://deals.com.au//uploads/deal_image/2683.jpg
        [1] => Name Necklace Australia
        [2] => Style yourself like SJP! Only $29 for a STERLING Silver Name Necklace plus get FREE delivery! Valued at $75 with NameNecklace.com.au
        [3] => 29
        [4] => 75
        [5] => 46
        [6] => http://deals.com.au/Melbourne
    )
)

Answer 1

您的数组片段

$array = array( // foreach ($array as $k=>$subarray)
'2280' /* this is your $k */ => 
    array( /* and this is your $subarray */
        'http://deals.com.au//uploads/deal_image/2706.jpg',

现在您获得了所需的数据（您必须使用嵌套

foreach

，因为数组的值是数组）：

foreach ($array as $k=>$subarray) {
    foreach ($subarray as $data) {
        echo $data;//of subarray
    }
}

更新

OP对我的回答提出评论问题：

如果我想要有选择性而不是获得大量数据转储怎么办？ 如果我 echo $data 如何访问特定行？

在大多数情况下，您应该将数组中的键和数据关联起来（我们在 PHP 中将其称为关联数组）。

示例1：

$hex_colors = array('FF0000', '00FF00' '0000FF');

值不与对应的键关联。 PHP 会将 0,1,2... 键分配给数组元素本身。在这种情况下，您将使用由

PHP

1 键自动分配的绿色十六进制值：

echo $hex_colors[1]; // 00FF00

，当然您应该确定它。通常，当您有像

array(red, green, bluee)

这样严格的数据结构时，会使用这种方法，但在大多数情况下，您最好使用以下方法：

示例2：

$hex_colors = array('red'=>'FF0000', 'green'=>'00FF00' 'blue'=>'0000FF');

十六进制颜色表示与适当的键相关联

echo $hex_colors['green']; // 00FF00

如果您的阵列是：

$array = array(
    '2280' => array(
        'image_url' => 'http://deals.com.au//uploads/deal_image/2706.jpg',
        'product_name' => 'Yuan\'s Massage and Beauty',
        'description' => 'Get Hair Free in CBD! Only $99 for SIX MONTHS worth of the latest in IPL Permanent Hair Reduction. Choose which area you want treated! Valued at $900 from Yuan's Massage and Beauty in the Heart of Melbourne's CBD. Limited vouchers available',
        'price' => 99,
        'weight_brutto' => 900,
        'weight_netto' => 801,
        'dealer_store' => 'http://deals.com.au/1827',
        ...

您将能够使用我们称之为“人类可读”键来访问数据：

foreach ($array as $id=>$product) {
    echo '<a href="http://myshop.com/?product_id='.$id.'">Buy '.$product['name'].'</a>';
    echo '<img class="product_thumbnail" src="'.$product['image_url'].'" />';
    echo 'Description: '.$product['description'];
    echo 'The price is '.number_format($product['price']);
    ...
}

它非常适合从数据库中读取行，例如：

while ($data = mysql_fetch_array($query_result_link, MYSQL_ASSOC)) { 
// MYSQL_ASSOC flag is not necessary
// PHP will use this flag by default for mysql_fetch_array function
// keys of $data will be correspondent columns names returned by mysql query
    echo $data['id'];
    echo $data['title'];
    ...
}

继续学习

PHP

，你会发现更多情况下关联键和值会更方便。

Answer 2

foreach ($arr1 as $key1 => $value1) {

    //$key1==2280; $value1 is the array
    foreach ($value1 as $key2 => $value2) {
        //$key2==0;$value2="http://deals.com.au//uploads/deal_image/2706.jpg"
    }

}