小编Hay*_*han的帖子

我在while循环中初始化一个数组变量,问题是当这个数组变量打印出while循环时,那么数组没有显示,当这个数组变量在循环中打印时,数组就会显示出来.

<?php 
  $all_rollno="";
  //Get Current Session
  $Res_Sess = mysql_query("SELECT sessionid from tbl_session where status=1 ORDER BY sessionid desc limit 1");
  $Row_Sess = mysql_fetch_array($Res_Sess);
  $Session = $Row_Sess[0];

 //Get Batch
 $Res_Bat = mysql_query("SELECT batchid,batchname,code FROM tbl_batch where status=1 and batchid!=12 ORDER BY batchid asc");

 while($Row_Bat = mysql_fetch_array($Res_Bat)){
     $Batch = $Row_Bat['batchid'];
     $Bat_Code = $Row_Bat['code'];

     //Present - Attendance
     $Patt4 = mysql_query("select count(id),rollno from tbl_attendance where batchid = '$Batch' and sessionid = '$Session' and attend = 1 GROUP by rollno");

     $arraytpresent="";
     $array_rollno="";
     $ipresent=0;
     while($Row_P4 = …