original_string: public function checkFilesystem()
      {
          $results = array(
              $this->checkPermissions(GC_FILE_CONFIG_COMPILED)
          );
  
          if (file_exists(GC_FILE_CONFIG_COMPILED_OVERRIDE)) {
              $results[] = $this->checkPermissions(GC_FILE_CONFIG_COMPILED_OVERRIDE);
          }
  
          $filtered = array_filter($results, 'is_string');
          return empty($filtered) ? true : $filtered;
      }
code: public function checkFilesystem()
      {
          $results = array(
              $this->checkPermissions(GC_FILE_CONFIG_COMPILED)
          );
  
          if (file_exists(GC_FILE_CONFIG_COMPILED_OVERRIDE)) {
              $results[] = $this->checkPermissions(GC_FILE_CONFIG_COMPILED_OVERRIDE);
          }
  
          $filtered = array_filter($results, 'is_string');
          return empty($filtered) ? true : $filtered;
      }
code_tokens: public function checkFilesystem ( ) { $ results = array ( $ this -> checkPermissions ( GC_FILE_CONFIG_COMPILED ) ) ; if ( file_exists ( GC_FILE_CONFIG_COMPILED_OVERRIDE ) ) { $ results [ ] = $ this -> checkPermissions ( GC_FILE_CONFIG_COMPILED_OVERRIDE ) ; } $ filtered = array_filter ( $ results , 'is_string' ) ; return empty ( $ filtered ) ? true : $ filtered ; }
docstring: Checks file system
  @return boolean|array
docstring_tokens: Checks file system