original_string: private function isPrefixedKey($key)
      {
          if (strlen($key) > 1) {
              if (substr($key, 0, 1) == '_') {
                  try {
                      intval(substr($key, 1, strlen($key) - 1));
  
                      return true;
                  } catch (\Exception $e) {
                      return false;
                  }
              }
          }
      }
code: private function isPrefixedKey($key)
      {
          if (strlen($key) > 1) {
              if (substr($key, 0, 1) == '_') {
                  try {
                      intval(substr($key, 1, strlen($key) - 1));
  
                      return true;
                  } catch (\Exception $e) {
                      return false;
                  }
              }
          }
      }
code_tokens: private function isPrefixedKey ( $ key ) { if ( strlen ( $ key ) > 1 ) { if ( substr ( $ key , 0 , 1 ) == '_' ) { try { intval ( substr ( $ key , 1 , strlen ( $ key ) - 1 ) ) ; return true ; } catch ( \ Exception $ e ) { return false ; } } } }
docstring: Check if a string is in the proper format
  to be a prefixed integral array key.
  
  @param  string  $key
  @return bool
docstring_tokens: Check if a string is in the proper format to be a prefixed integral array key .