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HomeBackend DevelopmentPHP Tutorial关于分批读取mysql数据存储到数组的有关问题

关于分批读取mysql数据存储到数组的问题
关于分批读取mysql数据存储到数组的问题

想把每次读取的记录都存储到数组里,大家都怎么实现的?我的代码始终实现不了,每次都是把最后一次从数据库中读出来的数据存到数组,前面的全被清空.有空的朋友帮帮忙提供下思路,想不明白了,先行谢谢了!~~~

PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->    $returnarray=array();    $str='';     $k_group=2;//做2组实验    $k_num=1   ;   //每一组实验随机取一条记录    $rr=array();    while($k_group) {      if ($k_num>0){//循环取出100条记录传入数组$returnarray,然后将最大,最小和中间值传出做为标本         //sql为了产生一条随机数据,有点笨,先这样用吧.       $sqlstr="        SELECT * FROM hmk AS t1 JOIN (SELECT ROUND(rand() * ((SELECT MAX(hmkid) FROM hmk)-(SELECT min(hmkid) FROM hmk))+(SELECT MIN(hmkid) FROM hmk)) AS id) AS t2 WHERE t1.hmkid >= t2.id ORDER BY t1.hmkid LIMIT 1 ";       $result=$db->query($sqlstr) ;        //if($result) echo '入库成功1312312!';else echo 'sorry! try again please!';         while($row=mysqli_fetch_array($result,MYSQLI_ASSOC)) {           $returnarray[]= $row; //[color=#FF0000]这里的$returnarray在下一组实验时就会被清空,怎么把数据保存下来?[/color]           }         $k_num--;                        $m=$returnarray;        //下面这段代码是从上面返回的数据中    取前1-6个字段,并把出现次数写入RR数组,朋友们可以先不管他        foreach ($m as $key=>$value) {           $i=0;           foreach ($value as $k) {            if($i0) {            if(array_key_exists($k,$rr)){                                       $rr[$k]++;                      //echo '$k='.$k ;                     }                                  else {                    $rr[$k]=1;                 }                    }                 $i++; }               }              }                        $k_group--;        }                    print_r($returnarray);   ;                print_r($m);//creat_array2table($m) ;


------解决方案--------------------
试了一下,不会回收.
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