Php 按特定值的最高值从多维数组返回值
我试图从最后一个数组编号中获取[headers]数组中的值。然后，我想将这些值分配给在foreach循环中使用的变量。[headers]数组编号有时与其他[headers]数组不同，您可以在下面看到这一点 第一个Php 按特定值的最高值从多维数组返回值,php,arrays,multidimensional-array,gmail-api,Php,Arrays,Multidimensional Array,Gmail Api,我试图从最后一个数组编号中获取[headers]数组中的值。然后，我想将这些值分配给在foreach循环中使用的变量。[headers]数组编号有时与其他[headers]数组不同，您可以在下面看到这一点 第一个[headers]数组在[0]=>数组和[1]数组下有“From”和“Date”。第二个[headers]数组在[11]=>数组和[12]=>数组下有“From”和“Date” 到目前为止，我仅使用以下方法获得了第一个匹配值： $arr = array($array);
[headers][0]=>数组和[1]数组下有“From”和“Date”。第二个[headers]数组在[11]=>数组和[12]=>数组下有“From”和“Date”
到目前为止，我仅使用以下方法获得了第一个匹配值：
$arr = array($array);
$arrIt = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
foreach ($arrIt as $sub) {
$subArray = $arrIt->getSubIterator();
if ($subArray['name'] === 'From') {
$outputArray = iterator_to_array($subArray);
}
}
使用此阵列：
Array
(
[id] => 15acc078ff3c13bb
[historyId] => 30098
[messages] => Array
(
[0] => Array
(
[id] => 15acc078ff3c13bb
[threadId] => 15acc078ff3c13bb
[labelIds] => Array
(
[0] => Label_335
[1] => IMPORTANT
[2] => Label_332
[3] => CATEGORY_PERSONAL
[4] => INBOX
)
[snippet] => ok
[historyId] => 30084
[internalDate] => 1489481730000
[payload] => Array
(
[mimeType] => multipart/alternative
[filename] =>
[headers] => Array
(
[0] => Array
(
[name] => From
[value] => google@gmail.com
)
[1] => Array
(
[name] => Date
[value] => Tue, 14 Mar 2017 15:55:30 +0700
)
)
)
[1] => Array
(
[id] => 15acc09c623d48dd
[threadId] => 15acc078ff3c13bb
[labelIds] => Array
(
[0] => SENT
)
[snippet] => test On Tue, Mar 14, 2017 at 3:55 PM, test user wrote: > ok
[historyId] => 30098
[internalDate] => 1489481877000
[payload] => Array
(
[partId] =>
[mimeType] => text/plain
[filename] =>
[headers] => Array
(
[11] => Array
(
[name] => From
[value] => google2@gmail.com
)
[12] => Array
(
[name] => Date
[value] => Tue, 14 Mar 2017 15:57:57 +0700
)
)
)
)
)
)
您可以使用数组_值来重新索引数组
$maxHistoryId = 0;
$headers = [];
foreach($array['id'] as $v)
{
if($v['historyId'] >= $max)
{
$max = $v['historyId'];
$headers = $v['payload']['headers'];
}
}
$resultArray = array_values($headers);
$resultArray = $resultArray[0];
为了使用数组的结构迭代所有头，可以执行以下操作。找到最后一个应该是微不足道的
foreach($yourArray['messages'] as $messages){
foreach($messages['payload']['headers'] as $header){
// header will have those values:
/*
* [0] => Array
(
[name] => From
[value] => google@gmail.com
)
[1] => Array
(
[name] => Date
[value] => Tue, 14 Mar 2017 15:55:30 +0700
)
[0] => Array
(
[name] => From
[value] => google2@gmail.com
)
[1] => Array
(
[name] => Date
[value] => Tue, 14 Mar 2017 15:57:57 +0700
)
*/
}
}
这不会打印任何结果，仅为空。可能是因为我在数组外留了一行，所以我更新了这个问题，您将看到historyId上面的[id]=>15acc7494d76f74e-我想这就是为什么您的代码不工作的原因，还将$maxHistoryId更改为$max