通过多维数组迭代 [英] iterating through multi dimensional arrays
问题描述
我想获得该项目的ID,然后该项目的ID内的所有OPTION_NAME / option_values。所以,我结束了,ID:123,颜色:蓝色,大小:6 ID:456,颜色:黄色,尺寸:8。但是我收到正确的项目编号,但OPTION_NAME /请将option_value不是通过正常来临,无论是空或只是一个随机的信。
下面是我的code不起作用,
的foreach($ ITEMLIST为$项)
{
回声$项目['身份证']; 的foreach($为$选择项)
{
回声$选项['OPTION_NAME'];
回声$选项['请将option_value'];
}
}
其中, $ ITEMLIST
是这样的:
排列
(
[1] =>阵列
(
[ID] => 123
[QTY] => 1
[产品型号] => sdfsd
[IMAGE] =>
[1] =>阵列
(
[OPTION_NAME] =>颜色
[请将option_value] =>蓝色
[option_price] => 0.0000
) [2] =>阵列
(
[OPTION_NAME] =>大小
[请将option_value] => 6
[option_price] => 0.0000
) [价格] => 0
) [2] =>阵列
(
[ID] => 456
[QTY] => 0
[产品型号] => gsdfgd
[IMAGE] =>
[1] =>阵列
(
[OPTION_NAME] =>颜色
[请将option_value] =>黄色
[option_price] => 0.0000
) [2] =>阵列
(
[OPTION_NAME] =>大小
[请将option_value] => 8
[option_price] => 0.0000
) [价格] => 0
))
基本上,你遍历了 $项目
阵列,它看起来像这样:
阵列(7){
[ID] =>字符串(6)123
[QTY] =>串(1)为1
[MODEL] =>字符串(11)sdfsd
[形象] =>字符串(0)
[1] =>
阵列(3){
[OPTION_NAME] =>字符串(8)颜色
[请将option_value] =>串(10),蓝
[option_price] =>字符串(6)0.0000
}
因此,在第一次迭代, $选项
将 123
,试图访问 '123'['OPTION_NAME']
将发出警告。你真正想做的事是这样的:
的foreach($项目[1] $关键=> $选项)
{
如果($关键!=='option_price')
{
回声$选项;
}
}
//要么:
回声$项目['身份证'],$项目[1] ['OPTION_NAME'],$项目['请将option_value'];
这就是为什么你的code不会产生预期的结果。
如果子阵列并不总是有 1
作为重点,尝试:
的foreach($项目为$富)
{
如果(is_array($富))
{
回声$ foo的['OPTION_NAME'],$ foo的['请将option_value'];
打破; //我们有我们所需要的,没有必要继续循环。
}
}
下面是最通用的方法来获取所有选项(无论多少)
的foreach($ ITEMLIST为$项)
{
回声$项目['身份证'];
的foreach($为$分项)
{
如果(is_array($子))
{
的foreach($子为$关键=> $选项)
{
回声$键,'=> ',$选项;
}
}
}
}
但看到你的选择阵列看起来像他们都具有数字索引,你也可以同样试试这个:
的foreach($ ITEMLIST为$项)
{
回声$项目['身份证'];
为($ i = 1;使用isset($项目[$ i]); $ I ++)
{
的foreach($项目[$ i]为$关键=> $选项)
{
回声$键,'=> ',$选项;
}
}
}
您可以替换为为
循环:
$ I = 0; //或$ I = 1
而(使用isset($项目[++ $ i]))//或使用isset($项目[$ I ++]),如果$ i是1
I am trying to get the item id, and then all option_name/option_values within that item id. So I end up with, ID: 123, Color: Blue, Size: 6. ID: 456, Color: Yellow, Size: 8. However I am getting the correct item ID, but the option_name/option_value isn't coming through correctly, either blank or just one random letter.
Here's my code that doesn't work,
foreach($itemlist as $item)
{
echo $item['ID'];
foreach($item as $option)
{
echo $option['option_name'];
echo $option['option_value'];
}
}
Where $itemlist
looks like this:
Array ( [1] => Array ( [ID] => 123 [QTY] => 1 [MODEL] => sdfsd [IMAGE] => [1] => Array ( [option_name] => Color [option_value] => Blue [option_price] => 0.0000 ) [2] => Array ( [option_name] => Size [option_value] => 6 [option_price] => 0.0000 ) [price] => 0 ) [2] => Array ( [ID] => 456 [QTY] => 0 [MODEL] => gsdfgd [IMAGE] => [1] => Array ( [option_name] => Color [option_value] => Yellow [option_price] => 0.0000 ) [2] => Array ( [option_name] => Size [option_value] => 8 [option_price] => 0.0000 ) [price] => 0 ) )
Basically, you're looping over the $item
array, which looks like this:
array(7) {
["ID"]=>string(6) "123"
["QTY"]=>string(1) "1"
["MODEL"]=>string(11) "sdfsd"
["IMAGE"]=>string(0) ""
[1]=>
array(3) {
["option_name"]=>string(8) "Color"
["option_value"]=>string(10) "Blue"
["option_price"]=>string(6) "0.0000"
}
So on the first iteration, $option
will be 123
, trying to access '123'['option_name']
will issue a warning. What you actually wanted to do is this:
foreach($item[1] as $key => $option)
{
if ($key !== 'option_price')
{
echo $option;
}
}
//or:
echo $item['ID'], $item[1]['option_name'], $item['option_value'];
That's why your code doesn't produce the desired result.
If the sub-array doesn't always have 1
as a key, try:
foreach($item as $foo)
{
if (is_array($foo))
{
echo $foo['option_name'], $foo['option_value'];
break;//we have what we needed, no need to continue looping.
}
}
Here's the most generic approach to get all options (irrespective of how many)
foreach($itemlist as $item)
{
echo $item['ID'];
foreach($item as $sub)
{
if (is_array($sub))
{
foreach($sub as $key => $option)
{
echo $key, ' => ', $option;
}
}
}
}
But seeing as your options arrays look like they all have numeric indexes, you could just as well try this:
foreach($itemlist as $item)
{
echo $item['ID'];
for ($i=1;isset($item[$i]);$i++)
{
foreach($item[$i] as $key => $option)
{
echo $key, ' => ', $option;
}
}
}
You could replace the for
loop with:
$i=0;//or $i = 1
while(isset($item[++$i]))// or isset($item[$i++]), if $i is 1
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