Ada pesan warning: mysql_num_rows()

ada pesan Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in
dan pesan Warning: mysql_fetch_row() expects parameter 1 to be resource, boolean given in

saya sudah berusaha keras untuk mengotak atik dengan menambahkan atribut num, fetch, query kemudian saya ganti dan pisahkan $this->num = mysql_num_rows(mysql_query("select * From mutiara_quran")); dengan pernyataan $result = mysql_query ("select * From mutiara_quran");
supaya saya bisa panggil dengan :

$this->result = mysql_query ("select * From mutiara_quran");
$this->num = mysql_num_rows($this->result);

masih blm bisa juga, dan saran ini sdh sy baca dari group ini, cuma codenya bkn oop

// pesan warning di $this->num = mysql_num_rows(mysql_query("select * From mutiara_quran"));
// pesan warning di $this->fetch = mysql_fetch_row($this->query);
<?php
  class mutiaraquran {
      var $id_quran;
      var $isi;
      var $surat;
      var $date;
      var $num;
      var $fetch;
      var $query;


      function getOneQuran(){
	       $this->num = mysql_num_rows(mysql_query("select * From mutiara_quran"));
	       $id=rand(1,$this->num);

$this->query=mysql_query("select * from mutiara_quran where qid= '$id' and status ='1' order by qid desc");
          return $this->query;
      }

      function Fetch(){
          $this->fetch = mysql_fetch_row($this->query);
          return $this->fetch;
      }

}
?>