Facebook 匯出 JSON 檔案編碼修正

facebook_export_json_decode.php

<?php
/**
** 使用方式：在下載回來解壓的最上層目錄，執行 php -f facebook_export_json_decode.php 會將目錄下所有 JSON 檔案都轉檔編碼過。
**/
function glob_recursive($pattern, $flags = 0) {
    $files = glob($pattern, $flags);
    foreach (glob(dirname($pattern) . '/*', GLOB_ONLYDIR | GLOB_NOSORT) as $dir) {
        $files = array_merge($files, glob_recursive($dir . '/' . basename($pattern), $flags));
    }
    return $files;
}
// Ref: https://sorashi.github.io/fix-facebook-json-archive-encoding/
function replace_with_byte($match) {
    return chr(hexdec($match[1]));
}
$results = glob_recursive('*.json');
foreach ($results as $key => $json) {
    $input  = file_get_contents($json);
    $output = preg_replace_callback('/\\\\u00([a-f0-9]{2})/', 'replace_with_byte', $input);
    file_put_contents($json . '_utf8.json', mb_convert_encoding($output, 'UTF-8', 'auto'));
}