我正在尝试将json文件解析为csv，当我遇到带有parent元素的多维数组时会发生问题-我需要该parent数组的每个子元素都必须是csv中带有parent值的单独行
当我尝试循环遍历子元素并且无法访问父级值时，就会出现问题-我正在考虑在循环数据之前制作紧缩的字符串，然后为每个值打印字符串+数据，但这似乎是骇客。有谁知道解决这个问题的更好方法？
[0]=>
array(7) {
["platform"]=>
string(7) "web"
["date"]=>
string(10) "2019-04-17"
["name"]=>
string(42) "something.com"
["data"]=>
array(10) {
[0]=>
array(2) {
["revenue"]=>
float(0.02)
["countryCode"]=>
string(2) "AU"
}
[1]=>
array(2) {
["revenue"]=>
float(0.03)
["countryCode"]=>
string(2) "BE"
}
[2]=>
array(2) {
["revenue"]=>
float(0.02)
["countryCode"]=>
string(2) "CH"
}
[3]=>
array(2) {
["revenue"]=>
float(0.01)
["countryCode"]=>
string(2) "CZ"
}
[4]=>
array(2) {
["revenue"]=>
float(0.34)
["countryCode"]=>
string(2) "GB"
}
[5]=>
array(2) {
["revenue"]=>
float(0.03)
["countryCode"]=>
string(2) "NL"
}
[6]=>
array(2) {
["revenue"]=>
float(0.01)
["countryCode"]=>
string(2) "NO"
}
[7]=>
array(2) {
["revenue"]=>
float(0.01)
["countryCode"]=>
string(2) "NZ"
}
[8]=>
array(2) {
["revenue"]=>
float(0.03)
["countryCode"]=>
string(2) "SE"
}
[9]=>
array(2) {
["revenue"]=>
float(2.46)
["countryCode"]=>
string(2) "US"
}
}
}
[1]=>
array(7) {
["platform"]=>
string(7) "web"
["date"]=>
string(10) "2019-04-17"
["name"]=>
string(42) "something-else.com"
["data"]=>
array(10) {
[0]=>
array(2) {
["revenue"]=>
float(0.72)
["countryCode"]=>
string(2) "AU"
}
[1]=>
array(2) {
["revenue"]=>
float(12.03)
["countryCode"]=>
string(2) "BE"
}
[2]=>
array(2) {
["revenue"]=>
float(0.27)
["countryCode"]=>
string(2) "CH"
}
[3]=>
array(2) {
["revenue"]=>
float(8.71)
["countryCode"]=>
string(2) "CZ"
}
}
}
我希望将其转换为：
platform,date,name,revenue,countryCode
"web","2019-04-17","something.com",0.02,"AU"
"web","2019-04-17","something.com",0.03,"BE"
"web","2019-04-17","something.com",0.02,"CH"
"web","2019-04-17","something.com",0.01,"CZ"
"web","2019-04-17","something.com",0.34,"GB"
...
设法做到这一点：
$f = fopen('examlple.csv', 'w');
$firstLineKeys = false;
foreach ($array as $line)
{
if (empty($firstLineKeys))
{
$firstLineKeys = array_keys($line);
array_pop($firstLineKeys); //removing data as we will loop over it later, and adding the 2 data keys that will be in the results.
$firstLineKeys[] = "country";
$firstLineKeys[] = "revenue";
fputcsv($f, $firstLineKeys);
$firstLineKeys = array_flip($firstLineKeys);
}
$line_array = array($line);
$string = array();
foreach ($line as $key => $value)
{
if($key !== "data"){
$string[]= $value;
}else{
foreach($value as $country){
$new_string = $string;
$new_string[]=$country['countryCode'];
$new_string[]=$country['revenue'];
fputcsv($f, $new_string);
}
}
array_push($line_array,$value);
}
}
但是我想知道是否还有更好的方法。
答案 0 :(得分：0)
我已经创建了如下数组，请检查它是否对您有帮助：
$final = array();
$i = 0;
$f = array();
echo '<pre>';
foreach($arr as $ar) {
$final[$i] = array(
'platform' => $ar['platform'],
'date' => $ar['date'],
'name' => $ar['name'],
);
foreach($ar['data'] as $key => $value) {
$f[] = array_merge($final[$i], $value);
}
$i++;
}
print_r($f);
die;
示例：
$arr = array(
array(
'platform' => 'web',
'date' => 'web',
'name' => 'web',
'data' => array(
array(
'revenue' => '0.02',
'countryCode' => 'AU',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU',
),
)
),
array(
'platform' => 'web1',
'date' => 'web',
'name' => 'web',
'data' => array(
array(
'revenue' => '0.0211',
'countryCode' => 'AU11',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU12',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU13',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU14',
),
)
),
array(
'platform' => 'web2',
'date' => 'web',
'name' => 'web',
'data' => array(
array(
'revenue' => '0.02',
'countryCode' => 'AU21',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU22',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU23',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU24',
),
)
),
array(
'platform' => 'web3',
'date' => 'web',
'name' => 'web',
'data' => array(
array(
'revenue' => '0.02',
'countryCode' => 'AU31',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU32',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU33',
),
array(
'revenue' => '0.02',
'countryCode' => 'AU34',
),
)
)
);
$final = array();
$i = 0;
$f = array();
echo '<pre>';
foreach($arr as $ar) {
$final[$i] = array(
'platform' => $ar['platform'],
'date' => $ar['date'],
'name' => $ar['name'],
);
foreach($ar['data'] as $key => $value) {
$f[] = array_merge($final[$i], $value);
}
$i++;
}
print_r($f);
die;