CsvUtility to detect delimiters and other properties of CSV files

CsvUtility.php

<?php

declare(strict_types = 1);

namespace WDB\PHP\Csv2content\Utility;

defined('TYPO3_MODE') || die();

class CsvUtility
{
    public static function detectParams($csvFilePath)
    {
        $delimiter = self::detectDelimiter($csvFilePath);
        $params = [
            'delimiter' => $delimiter,
            'enclosure' => self::detectEnclosure($csvFilePath, $delimiter),
            'escape'    => self::detectEnclosure($csvFilePath, $delimiter),
            'encoding'  => self::detectEncoding($csvFile, $delimiter),
        ];
        return $params;
    }

    public static function detectEnclosure($csvFile, $delimiter)
    {
        // TODO
        return '"';
    }

    public static function detectEscape($csvFile, $delimiter)
    {
        // TODO
        return '\\';
    }

    public static function detectEncoding($csvFile, $delimiter)
    {
        // TODO
        return 'UTF-8';
    }

    public static function detectDelimiter($csvFile, $linesToCheck = 100) : ?string
    {
        $handle = fopen($csvFile, "r");
        $delimiters = [";" => 0, "," => 0, "\t" => 0, "|" => 0, null => 0];
        $n = 0;
        while (($line = fgets($handle)) && $n < $linesToCheck)
        {
            # debug ($line);
            if (strlen($line)) {
                $delimiters[self::detectDelimiterInLine($line)]++;
                $n++;
            }
        }
        fclose($handle);
        $hasResult = true;
        if (max($delimiters) === 0) {
            $hasResult = false;
        } else {
            $countMax = 0;
            $max = array_search(max($delimiters), $delimiters);
            foreach ($delimiters as $delimiter => $count) {
                if ($count == $max) {
                    $countMax++;
                }
            }
            // TODO:
            if ($countMax > 1 || $max === null) {
                #$hasResult = false;
            }
            # debug (['$delimiters' => $delimiters, '$countMax' => $countMax, '$max' => $max, '$hasResult' => $hasResult]);
        }
        # debug(['$delimiters'=>$delimiters, '$hasResult' => $hasResult, '$max' => $max], __METHOD__.':'.__LINE__);
        return $hasResult ? $max : null;
    }

    /**
    * based on https://stackoverflow.com/a/59581170/1019850
    * @param string $csvFile Path to the CSV file
    * @return string Delimiter
    */
    public static function detectDelimiterInLine($line) : ?string
    {
        $delimiters = [";" => 0, "," => 0, "\t" => 0, "|" => 0];
        foreach ($delimiters as $delimiter => &$count) {
            $count = count(str_getcsv($line, $delimiter));
        }
        $hasResult = true;
        if (max($delimiters) === 0) {
            $hasResult = false;
        } else {
            $countMax = 0;
            $max = array_search(max($delimiters), $delimiters);
            foreach ($delimiters as $delimiter => $count) {
                if ($count == $max) {
                    $countMax++;
                }
            }
            if ($countMax > 1) {
                $hasResult = false;
            }
        }
        // DebuggerUtility::var_dump(['$delimiters' => $delimiters, '$hasResult' => $hasResult, '$max' => $max], __METHOD__.':'.__LINE__);
        return $hasResult ? $max : null;
    }
    
}

Line 18 'encoding' => self::detectEncoding($csvFile, $delimiter),
should be
'encoding' => self::detectEncoding($csvFilePath, $delimiter),