我正在尝试使用foreach循环在PHP中创建一个多维数组。这是迄今为止的代码：
for($day1=$day; $day1<=2; $day1++)
{
$train_list['option'][] = array('day' => $day1);
$train = $train_xpath->query('//li/div/div[contains(@class, "smallFont farelist")]');
if($train->length > 0)
{
foreach($train as $f)
{
$time_s = $train_xpath->evaluate('string(./div[@class="train-time"]/text()[1])', $f);
$time_e = $train_xpath->evaluate('string(./div[@class="train-time"]/text()[2])', $f);
$fare = $train_xpath->evaluate('string(./div[@class="train-info"]/div/div[@class="total-price"])', $f);
$train_list['option'][0]["value"][]= array('train_no' => $train_xpath->evaluate('string(./div[@class="train-no"])', $f),
'departure_time' => "$time_s ",
'arrival_time' => "$time_e ",
'price' => $fare );
}
}
}
此代码的输出如下所示：
Array
(
[option] => Array
(
[0] => Array
(
[day] => 1
[value] => Array
(
[0] => Array
(
[train_no] => D7 372
[departure_time] => 10:00
[arrival_time] => 14:40
[price] => 69.00
)
[1] => Array
(
[train_no] => D7 376
[departure_time] => 17:45
[arrival_time] => 22:25
[price] => 59.00
)
)
)
[1] => Array
(
[day] => 2
)
)
)
但是，这不是意图。所需的数组应如下所示：
Array
(
[option] => Array
(
[0] => Array
(
[day] => 1
[value] => Array
(
[0] => Array
(
[train_no] => D7 372
[departure_time] => 10:00
[arrival_time] => 14:40
[price] => 59.00
)
[1] => Array
(
[train_no] => D7 376
[departure_time] => 17:45
[arrival_time] => 22:25
[price] => 49.00
)
)
)
[1] => Array
(
[day] => 2
[value] => Array
(
[0] => Array
(
[train_no] => D7 372
[departure_time] => 10:00
[arrival_time] => 14:40
[price] => 59.00
)
[1] => Array
(
[train_no] => D7 376
[departure_time] => 17:45
[arrival_time] => 22:25
[price] => 69.00
)
)
)
)
)
如何修改代码以实现目标？
答案 0 :(得分：1)
您正在覆盖索引0.为了不这样做并使用未知数量的条目填充数组，您需要首先构建条目，然后分配给数组的下一个值。如果您知道条目数，则可以使用计数器并按该索引访问该数组。
试试这个：
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希望它有所帮助！