[英]How to create an associative array from two arrays?
我有两个数组一个用于键,另一个用于值。 values数组是一个数组数组。
键阵列:
$keyArray = array("clientId","clientName","clientAdsress","clientPhone");
值数组:
$valuesArray = array(
"0"=>array("1001","aaaaa","ddddddd","22222222"),
"1"=>array("1002","bbbbbb","ddddddd","11111111"),
"2"=>array("1003","ccccc","ddddddd","33333333")
);
预期产出:
$finalData = array(
"clientId"=>array("1001","1002","1003"),
"clientName"=>array("aaaaa","bbbbbb","ccccc"),
"clientAdsress"=>array("ddddddd","ddddddd","ddddddd"),
"clientPhone"=>array("22222222","11111111","33333333")
);
我试过这段代码:
$finalData = array();
for($i=0;$i<count($keyArray);$i++){
for($j=0;$j<count($valuesArray);$j++){
$rowArray = $valuesArray[$j];
$finalData[$keyArray[$i]] = array($rowArray[$i]);
}
}
echo '<pre>';print_r($finalData);echo '</pre>';
输出:
Array
(
[clientId] => Array
(
[0] => 1003
)
[clientName] => Array
(
[0] => ccccc
)
[clientAdsress] => Array
(
[0] => ddddddd
)
[clientPhone] => Array
(
[0] => 33333333
)
)
我得到了数组的最后一个值。 如何获得预期的输出?
一个简单的foreach
解决方案:
<?php
$keyArray = array("clientId", "clientName", "clientAdsress", "clientPhone");
$valuesArray = array(
"0" => array("1001", "aaaaa", "ddddddd", "22222222"),
"1" => array("1002", "bbbbbb", "ddddddd", "11111111"),
"2" => array("1003", "ccccc", "ddddddd", "33333333")
);
$expected = array(
"clientId" => array("1001", "1002", "1003"),
"clientName" => array("aaaaa", "bbbbbb", "ccccc"),
"clientAdsress" => array("ddddddd", "ddddddd", "ddddddd"),
"clientPhone" => array("22222222", "11111111", "33333333")
);
$result = [];
foreach ($keyArray as $key => $keyName) {
foreach ($valuesArray as $value) {
$result[$keyName][] = $value[$key];
}
}
var_dump($result === $expected);
输出为7.1.25 - 7.3.2
布尔(真)
一种方法是使用array_combine
和array_column
:
$finalData = array_combine($keyArray, array(array_column($valuesArray, 0),
array_column($valuesArray, 1),
array_column($valuesArray, 2),
array_column($valuesArray, 3)));
print_r($finalData);
输出:
Array (
[clientId] => Array ( [0] => 1001 [1] => 1002 [2] => 1003 )
[clientName] => Array ( [0] => aaaaa [1] => bbbbbb [2] => ccccc )
[clientAdsress] => Array ( [0] => ddddddd [1] => ddddddd [2] => ddddddd )
[clientPhone] => Array ( [0] => 22222222 [1] => 11111111 [2] => 33333333 )
)
基于尼克的答案 ,一个简单的解决方案,不需要硬编码密钥的数量将是:
$finalData = array_combine($keyArray, array_map(null, ...$valuesArray));
( 3v4l.org上的演示 )
基本上,这首先使用array_map
转换二维$valuesArray
,如本答案中所述 ,将列更改为行,反之亦然,然后使用array_combine
将结果与$keyArray
array_combine
如Nick的答案。
<?php
$keyArray = array(
"clientId","clientName","clientAdsress","clientPhone"
);
$valuesArray = array(
"0"=>array("1001","aaaaa","ddddddd","22222222"),
"1"=>array("1002","bbbbbb","ddddddd","11111111"),
"2"=>array("1003","ccccc","ddddddd","33333333")
);
foreach($keyArray as $keyIndex => $keyName)
$finalData[$keyName] = array_column($valuesArray, $keyIndex);
print_r($finalData);
输出:
Array
(
[clientId] => Array
(
[0] => 1001
[1] => 1002
[2] => 1003
)
[clientName] => Array
(
[0] => aaaaa
[1] => bbbbbb
[2] => ccccc
)
[clientAdsress] => Array
(
[0] => ddddddd
[1] => ddddddd
[2] => ddddddd
)
[clientPhone] => Array
(
[0] => 22222222
[1] => 11111111
[2] => 33333333
)
)
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