function file_upload_max_size

Determines the maximum file upload size by querying the PHP settings.

Return value

A file size limit in bytes based on the PHP upload_max_filesize and post_max_size

Related topics

4 calls to file_upload_max_size()
file_ajax_upload in drupal/modules/file/file.module
Menu callback; Shared Ajax callback for file uploads and deletions.
file_field_instance_settings_form in drupal/modules/file/
Implements hook_field_instance_settings_form().
file_field_widget_upload_validators in drupal/modules/file/
Retrieves the upload validators for a file field.
file_save_upload in drupal/includes/
Saves a file upload to a new location.


drupal/includes/, line 2182
API for handling file uploads and server file management.


function file_upload_max_size() {
  static $max_size = -1;
  if ($max_size < 0) {

    // Start with post_max_size.
    $max_size = parse_size(ini_get('post_max_size'));

    // If upload_max_size is less, then reduce. Except if upload_max_size is
    // zero, which indicates no limit.
    $upload_max = parse_size(ini_get('upload_max_filesize'));
    if ($upload_max > 0 && $upload_max < $max_size) {
      $max_size = $upload_max;
  return $max_size;