whole_func_string: function() {
      let ch;
      while (this.offset < this.size) {
        ch = this.input();
        if (ch !== "0" && ch !== "1") {
          if (ch) this.unput(1);
          break;
        }
      }
      return this.tok.T_LNUMBER;
    }
func_code_string: function() {
      let ch;
      while (this.offset < this.size) {
        ch = this.input();
        if (ch !== "0" && ch !== "1") {
          if (ch) this.unput(1);
          break;
        }
      }
      return this.tok.T_LNUMBER;
    }
func_documentation_string: read binary