从多维数组php创建不同的数组集
我一直在尝试创建一个不同的国家/地区代码数组，该数组将获取仅针对该国家/地区的所有日期，并使用 PHP 中的多维数组添加到该数组中，但我无法存档。
输入数组
Array
(
[0] => Array
(
[0] => 2019-01-01
[1] => lt
[2] => passport
[3] => 30122719
[4] => 2019-03-01
[5] => 357717289
)
[1] => Array
(
[0] => 2019-01-01
[1] => pl
[2] => identity_card
[3] => 9879386836
[4] => 2018-11-01
[5] => 643023760
)
[2] => Array
(
[0] => 2019-01-02
[1] => lt
[2] => passport
[3] => 46530663
[4] => 2019-03-01
[5] => 357717289
)
[3] => Array
(
[0] => 2019-01-02
[1] => pl
[2] => identity_card
[3] => 4531480055
[4] => 2017-10-21
[5] => 324444899
)
[4] => Array
(
[0] => 2019-01-03
[1] => lt
[2] => passport
[3] => 54163812
[4] => 2019-03-01
[5] => 357717289
)
[5] => Array
(
[0] => 2019-01-03
[1] => fr
[2] => drivers_license
[3] => 95180604
[4] => 2018-07-02
[5] => 942959784
)
)
预期输出
Array
(
[lt] => Array
(
[0] => 2019-03-01
[1] => 2019-03-01
[2] => 2019-03-01
)
[pl] => Array
(
[0] => 2018-11-01
[1] => 2017-10-21
)
[fr] => Array
(
[0] => 2018-07-02
)
)
到目前为止，我已经尝试了以下
$dist = array();
foreach ($inputArray as $key => $value) {
foreach ($value as $index => $v) {
$dist[$value[1]] = $value[4];
}
}
代码返回以下内容
Array
(
[lt] => 2019-03-01
[pl] => 2016-08-01
[fr] => 2019-04-01
[de] => 2009-01-01
[uk] => 2015-09-07
[es] => 2015-09-08
[it] => 2019-02-16
)
SMILET1回答
-
MMTTMM
您非常接近 - 您只是错过了[]将元素附加到数组的运算符。看到这个：$dist = array();$cc = array('fr', 'pl', 'lt');foreach ($inputArray as $key => $val) { if (in_array($val[1], $cc) { //get only the county code you want $dist[$val[1]][] = $val[4]; // notice the change in this line }}
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