60. Konwerter formatów tekstowych

{
  "history": [
    {
      "id": 1,
      "operation": "csv_to_json",
      "input_length": 150,
      "output_length": 280,
      "created_at": "2026-02-10 14:30:00"
    }
  ]
}

<?php
// Konwersja CSV → JSON
function csvToJson(string $csv, string $delimiter = ','): string {
    $rows = [];
    $lines = explode("\n", trim($csv));
    $headers = str_getcsv(array_shift($lines), $delimiter);

    foreach ($lines as $line) {
        if (empty(trim($line))) continue;
        $values = str_getcsv($line, $delimiter);
        $rows[] = array_combine($headers, $values);
    }

    return json_encode($rows, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
}

// Konwersja JSON → CSV
function jsonToCsv(string $json): string {
    $data = json_decode($json, true);
    if (!is_array($data) || empty($data)) return '';

    $output = [];
    $headers = array_keys($data[0]);
    $output[] = implode(',', $headers);

    foreach ($data as $row) {
        $output[] = implode(',', array_map(function($val) {
            return '"' . str_replace('"', '""', $val) . '"';
        }, $row));
    }

    return implode("\n", $output);
}

// Statystyki tekstu
function getTextStats(string $text): array {
    return [
        'chars' => mb_strlen($text),
        'chars_no_spaces' => mb_strlen(str_replace(' ', '', $text)),
        'words' => str_word_count(strip_tags($text)),
        'lines' => substr_count($text, "\n") + 1,
    ];
}