Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Helper/Sample.php
public function getSamples()
    {
        // Populate samples
        $baseDir = realpath(__DIR__ . '/../../../samples');
        $directory = new RecursiveDirectoryIterator($baseDir);
        $iterator = new RecursiveIteratorIterator($directory);
        $regex = new RegexIterator($iterator, '/^.+\.php$/', RecursiveRegexIterator::GET_MATCH);

        $files = [];
        foreach ($regex as $file) {
            $file = str_replace($baseDir . '/', '', $file[0]);
            $info = pathinfo($file);
            $category = str_replace('_', ' ', $info['dirname']);
            $name = str_replace('_', ' ', preg_replace('/(|\.php)/', '', $info['filename']));
            if (!in_array($category, ['.', 'boostrap', 'templates'])) {
                if (!isset($files[$category])) {
                    $files[$category] = [];
                }
                $files[$category][$name] = $file;
            }
        }

        // Sort everything
        ksort($files);
        foreach ($files as &$f) {
            asort($f);
        }

        return $files;
    }
public function getSamples()
    {
        // Populate samples
        $baseDir = realpath(__DIR__ . '/../../../samples');
        $directory = new RecursiveDirectoryIterator($baseDir);
        $iterator = new RecursiveIteratorIterator($directory);
        $regex = new RegexIterator($iterator, '/^.+\.php$/', RecursiveRegexIterator::GET_MATCH);

        $files = [];
        foreach ($regex as $file) {
            $file = str_replace($baseDir . '/', '', $file[0]);
            $info = pathinfo($file);
            $category = str_replace('_', ' ', $info['dirname']);
            $name = str_replace('_', ' ', preg_replace('/(|\.php)/', '', $info['filename']));
            if (!in_array($category, ['.', 'boostrap', 'templates'])) {
                if (!isset($files[$category])) {
                    $files[$category] = [];
                }
                $files[$category][$name] = $file;
            }
        }

        // Sort everything
        ksort($files);
        foreach ($files as &$f) {
            asort($f);
        }

        return $files;
    }
Returns an array of all known samples.

@return string[] [$name => $path]