diff --git a/testdb.php b/testdb.php
new file mode 100644
index 0000000..79a211b
--- /dev/null
+++ b/testdb.php
@@ -0,0 +1,62 @@
+<?php
+            //link to mysql
+            $con=mysqli_connect("127.0.0.1:3306","buptStudent","buptStudentlx","buptStudentdb");
+            if (!$con){die('Could not connect:' . mysql_error());};
+            //mysql_select_db("my_db_test", $con);
+            $p = 20;
+            $pp = 0;
+            $ppp = $p + $pp;//the number of questions
+            echo "<div id=\"ppp\" ppp=\"".$ppp."\"></div>\n<div class=\"section\" id=\"hiddenBefore\" style=\"display:none\"><h5>&nbsp;&nbsp;单选题</h5>\n";
+            //创建随机数组
+            $randomArray = array_rand(range(1,99),$p+1);
+            // for($i = 1;$i <= $p;$i++){
+            //   echo $randomArray[$i]."  ";
+            // }
+            shuffle($randomArray);
+            $count = 0;
+            for($i = 1;$i <= $p;$i++){
+              $flag = 0;
+              $random = $randomArray[$i];
+              $result = mysqli_query($con,"SELECT * FROM Persons WHERE num='$random'");
+              while($row = mysqli_fetch_array($result)){
+                  $count += 1;
+                  echo "当前查询次数:$count, 查询行数: $random, 查询题号: $i";
+              //html
+                $flag = 1;
+                echo "<div class=\"spbq\" name=\"div_e\"><div class=\"biankuang biankuang_1\"></div><div class=\"biankuang biankuang_2\"></div><div class=\"biankuang biankuang_3\"></div><div class=\"biankuang biankuang_4\"></div>";
+                echo "<h6 id=\"question_".$i."\">". $i. ".". $row['q'] ."</h6>\n<p>";
+                echo "<input class=\"with-gap\" type=\"radio\" name=\"answer_". $i. "\" value=\"1\" id=\"test". $i. "1\" onclick=\"addOne(this)\"/>\n<label for=\"test". $i. "1\">". $row['A'] ."</label>\n";
+                echo "<input class=\"with-gap\" type=\"radio\" name=\"answer_". $i. "\" value=\"2\" id=\"test". $i. "2\" onclick=\"addOne(this)\"/>\n<label for=\"test". $i. "2\">". $row['B'] ."</label>\n";
+                echo "<input class=\"with-gap\" type=\"radio\" name=\"answer_". $i. "\" value=\"3\" id=\"test". $i. "3\" onclick=\"addOne(this)\"/>\n<label for=\"test". $i. "3\">". $row['C'] ."</label>\n";
+                if($row['D']){
+                  echo "<input class=\"with-gap\" type=\"radio\" name=\"answer_". $i. "\" value=\"4\" id=\"test". $i. "4\" onclick=\"addOne(this)\"/>\n<label for=\"test". $i. "4\">". $row['D'] ."</label>\n";
+                }
+                echo "</p></div>\n";
+                echo "<div class=\"input-field col s12\" style=\"height:1px;overflow:hidden\"><input value=\"".$random."\" type=\"text\" class=\"validate\" style=\"color:#fff\" name=\"question_".$i."\"></div>\n";
+              }
+              echo $flag;
+              if($flag == 0){
+                $i--;
+                echo $i;
+                sleep(0.4);
+              }
+            }
+
+            // echo "<!-- </div><div class=\"section\"> --><h5>&nbsp;&nbsp;二、判断题</h5>";
+            // $randomArray = range(1,10);
+            // shuffle($randomArray);
+            // for($i = 1;$i <= $pp;$i++){
+            //   $random = $randomArray[$i] + 60;
+            //   $result = mysqli_query($con,"SELECT q FROM Persons WHERE num='$random'");
+            //   while($row = mysqli_fetch_array($result)){
+            //     $j = $i + $p;
+            //     //echo "<p>".$row."</p>";
+            //     echo "<div class=\"spbq\" name=\"div_e\"><div class=\"biankuang biankuang_1\"></div><div class=\"biankuang biankuang_2\"></div><div class=\"biankuang biankuang_3\"></div><div class=\"biankuang biankuang_4\"></div><h6 id=\"question_".$j."\">". $j. ".". $row['q'] ."</h6>\n<p><input class=\"with-gap\" type=\"radio\" name=\"answer_". $j. "\" value=\"1\" id=\"test". $j. "1\" onclick=\"addOne(this)\"/>\n<label for=\"test". $j. "1\">正确</label>\n<input class=\"with-gap\" type=\"radio\" name=\"answer_". $j. "\" value=\"2\" id=\"test". $j. "2\" onclick=\"addOne(this)\"/>\n<label for=\"test". $j. "2\">错误</label>\n</p></div>\n";
+            //     echo "<div class=\"input-field col s12\" style=\"height:1px;overflow:hidden\"><input value=\"".$random."\" type=\"text\" class=\"validate\" style=\"color:#fff\" name=\"question_".$j."\"></div>\n";
+            //   }
+            // }
+
+            echo "</div>";
+            //close linking
+            mysqli_close($con);
+            ?>
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