public function CsvMimeDetector::detect in MimeDetect 8

Try MIME detection on a given file.

Parameters

string $path: Path of the file to be analyzed.

Return value

string The detected MIME, NULL if file contents are not recognized.

Overrides MimeDetectorInterface::detect

File

src/Plugin/MimeDetector/CsvMimeDetector.php, line 21

Class

CsvMimeDetector

Provides a CSV MIME detector.

Namespace

Drupal\mimedetect\Plugin\MimeDetector

Code

public function detect($path) {
  if (($handler = @fopen($path, 'r')) !== FALSE) {

    // Check first line, it must be printable text.
    $first_line = fgets($handler, 16384);
    if ($first_line && strlen($first_line) && ctype_print(str_replace([
      "\n",
      "\r",
    ], '', $first_line))) {
      rewind($handler);

      // Read the first two lines, they must have the same number of columns.
      $columns = [];
      while (($data = fgetcsv($handler)) !== FALSE && count($columns) < 2) {
        $columns[] = count($data);
      }
      if (count($columns) == 1 || $columns[0] == $columns[1]) {
        return 'text/csv';
      }
    }
  }
  return NULL;
}