require('teacher_config.php'); $nj=$_GET['nj']; $fbh=$_GET['bh']."-"; $bh=$fbh."1"; $stime="20".date("y-m-d")." ".date("H:i:s"); $string="SELECT * FROM Sch_Exam WHERE bh like '%".$fbh."%'"; $nums=$conn->get($string); $maxnum=20; for ($a=0;$a<$nums;$a++){ $arr[$a]=$a+1; } if ($nums>$maxnum){ $dis=$nums-$maxnum; $randnum=$nums-1; $rand=rand(0,$randnum); while ($dis>0){ if ($arr[$rand]>0){ $arr[$rand]=0; $dis=$dis-1; }else{ $rand=rand(0,$randnum); } } } ?>