从 github 上的 countries.csv 文件中提取 Json 数据，并创建一个单独的时区数组

Question

这是 countries.csv 文件，我想从中提取所有时区，这是它的第 14 列，其中的数据不正确 json formatted。我正在尝试解析 json 但它失败了。实际上，我想创建一个 array 这样的时区

    [0] => {zoneName:'Asia -> Kabul',gmtOffset:16200,gmtOffsetName:'UTC+04:30',abbreviation:'AFT',tzName:'Afghanistan Time'}
    [1] => {zoneName:'Europe -> Mariehamn',gmtOffset:7200,gmtOffsetName:'UTC+02:00',abbreviation:'EET',tzName:'Eastern European Time'}
    [2] => {zoneName:'Europe -> Tirane',gmtOffset:3600,gmtOffsetName:'UTC+01:00',abbreviation:'CET',tzName:'Central European Time'}
    [3] => {zoneName:'Africa -> Algiers',gmtOffset:3600,gmtOffsetName:'UTC+01:00',abbreviation:'CET',tzName:'Central European Time'}
    [4] => {zoneName:'Pacific -> Pago_Pago',gmtOffset:-39600,gmtOffsetName:'UTC-11:00',abbreviation:'SST',tzName:'Samoa Standard Time'}
    [5] => {zoneName:'Europe -> Andorra',gmtOffset:3600,gmtOffsetName:'UTC+01:00',abbreviation:'CET',tzName:'Central European Time'}
    [6] => {zoneName:'Africa -> Luanda',gmtOffset:3600,gmtOffsetName:'UTC+01:00',abbreviation:'WAT',tzName:'West Africa Time'}

我在做什么，这是在App\Http\Controllers\TestController::class是这个

    public function timezone(): void {
        $data = [];

        if (($open = fopen(__DIR__ . '/countries.csv', 'r + b')) !== FALSE) {
            while (($singleRecord = fgetcsv($open, NULL, ',')) !== FALSE) {
                $data[] = $singleRecord;
            }
            fclose($open);
        }

        $data = $this->removeCharacters($data, ['[', ']']);
        $data = $this->removeCharacters($data, (array)'\/', " -> ");

        // $data = $this->removeCharacters($data, (array)'{}', '');
        // dd(explode('},', $data[33][14]));
        // dd(explode('},', $this->longJson));
        // dd(explode(',', str_replace(['{', '}'], '', $data[167][14])));

        $singleArray = [];
        $count = count($data);
        $itemsArray = [];

        for ($i = 1; $i < $count; $i++) {

            $singleArray[] = explode('},', $data[$i][14]);

            foreach ($singleArray as $item) {

                foreach ($item as $singleItem) {

                    $itemsArray[] = $singleItem;

                }
            }
        }
        $itemsArray = array_unique($itemsArray);

        $this->printFormattedData($itemsArray);
    }
 private function removeCharacters($hayStack, array $charsArray, $character = ''): array {
        $tempArray = [];
        foreach ($hayStack as $item) {
            $tempArray[] = str_replace($charsArray, $character, $item);
        }
        return $tempArray;
    }

    private function printFormattedData($data): void {
        echo '<pre>';
        print_r($data);
        echo '</pre>';
    }

Answer 1

下面的代码会做，你的目标。

Please do not forget to mark this answer as ACCEPTED and thumbs up if it solves your problem, so that the work of the developers who help is appreciated and other developers can see in question list, that your question has already an accepted answer.

$lines = file("countries.csv");
array_shift($lines); // remove the first line with column names

$searchReplace  = ['\/' => '->'];
$search = array_keys($searchReplace);
$replace = array_values($searchReplace);

$jsonFormattedTimeZones = [];
foreach($lines as $line)
{
    $line = trim(str_getcsv($line)[14], " []");
    $line = str_replace($search, $replace, $line);
    $jsonFormattedTimeZones[] = $line;
}

print_r($jsonFormattedTimeZones);

Answer 2

使用正则表达式不是完美的解决方案，但您可以使用如下函数转换时区数据以更正 json 格式：

public function fixJson(string $str): string {
    return preg_replace(
        '/(?<=(\{|\,))(\w+)(?=\:)/',
        '""',
        str_replace("'", '"', $zoneRaw) // may not work properly, if values may contain apostroph symbols, but seems not actual for your case
    );
}

所以，使用这个函数：

$this->fixJson($data[$i][14]); // returns json string
json_decode($this->fixJson($data[$i][14])); // returns json decoded array

在此处查看用法示例https://sandbox.onlinephpfunctions.com/c/88f21

从 github 上的 countries.csv 文件中提取 Json 数据，并创建一个单独的时区数组

Extract Json data from a countries.csv file on github, and create a seperate array of timezones

php

arrays

parsing

json

laravel