diff --git a/testdb.php b/testdb.php
index 2d807d0..9c3630c 100644
--- a/testdb.php
+++ b/testdb.php
@@ -18,11 +18,13 @@
               $flag = 0;
               $random = $randomArray[$i];
               $result = mysqli_query($con,"SELECT * FROM Persons WHERE num='$random'");
-              while($row = mysqli_fetch_array($result)){
+              $row = mysqli_fetch_array($result)
                   $count += 1;
                   echo "当前查询次数:$count, 查询行数: $random, 查询题号: $i";
               //html
-                $flag = 1;
+                if($row) {
+                    $flag = 1;
+                }
                 echo "<div class=\"spbq\" name=\"div_e\"><div class=\"biankuang biankuang_1\"></div><div class=\"biankuang biankuang_2\"></div><div class=\"biankuang biankuang_3\"></div><div class=\"biankuang biankuang_4\"></div>";
                 echo "<h6 id=\"question_".$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\">". $row['A'] ."</label>\n";
@@ -33,7 +35,7 @@
                 }
                 echo "</p></div>\n";
                 echo "<div class=\"input-field col s12\" style=\"height:1px;overflow:hidden\"><input value=\"".$random."\" type=\"text\" class=\"validate\" style=\"color:#fff\" name=\"question_".$i."\"></div>\n";
-              }
+              
               echo $flag;
               if($flag == 0){
                 $i--;