original_string: public static function at($string, $index)
      {
          if (self::length($string) >= ($index + 1)) {
              return $string[$index];
          }
  
          exception(StringOutIndexException::class);
      }
code: public static function at($string, $index)
      {
          if (self::length($string) >= ($index + 1)) {
              return $string[$index];
          }
  
          exception(StringOutIndexException::class);
      }
code_tokens: public static function at ( $ string , $ index ) { if ( self :: length ( $ string ) >= ( $ index + 1 ) ) { return $ string [ $ index ] ; } exception ( StringOutIndexException :: class ) ; }
docstring: Get the char at an index from a given string.
  
  @param string $string
  @param int    $index
  
  @return string | bool
docstring_tokens: Get the char at an index from a given string .