update: PV Counter

.gitignore

@@ -1 +1,2 @@
 .vscode/
+.files/

html/footer.php

@@ -9,18 +9,14 @@
 <span style="color: grey; font-size: x-small; ">
     <a href="https://beian.miit.gov.cn" target="_blank">浙ICP备18056264号-1</a>
 </span>
-</div>
+
-<div>&nbsp;</div>
+<span style='color:grey;font-size:small;'>
-<div>&nbsp;</div>
-<div>&nbsp;</div>
-</div>
-</body>
-</html>
 <?php
 ini_set("display_errors", "1");
+$mysqli = new mysqli('localhost','root','nancysimon','myquant');
 function log_pv(){
     #echo "start log";
-    $mysqli = new mysqli('localhost','root','nancysimon','myquant');
+    global $mysqli;
     $vpage  = addslashes($_SERVER['PHP_SELF']);
     $ua     = addslashes($_SERVER['HTTP_USER_AGENT']);
     $ip     = $_SERVER['REMOTE_ADDR'];
@@ -31,7 +27,56 @@ function log_pv(){
                   values ('".$vpage."','".$qs."','".$ip."', '".$ua."','".$vtime."')";
 
     $mysqli->query($sql);
-    $mysqli->close();
+   
+}
+function pv_counter($user=''){
+    global $mysqli;
+    $hits=0;           //set default page hits 0;
+    $page=$_SERVER['PHP_SELF'];
+  
+    $lmtime=date("Y-m-d H:i:s");
+  
+    $sql="select hits from pv_counter where page_name='".$page."'";
+    $result=$mysqli->query($sql);
+    $rt=$result->fetch_all(MYSQLI_ASSOC);
+    
+    $n=count($rt);
+    if($n<1){
+        $sql =  "insert into pv_counter(page_id,Page_name,hits,lm_date,lm_ip,lm_user)
+                values (null,
+                    '".$page."','1','".$lmtime."',
+                    '".$_SERVER['REMOTE_ADDR']."','".$user."')";
+  
+        $mysqli->query($sql);
+        $hits=1;
+    }
+    if($n==1){
+        $hits=$rt[0]['hits'];
+        $hits++;
+        $sql="update pv_counter set hits='".$hits."',lm_date='".$lmtime."',
+                lm_ip='".$_SERVER['REMOTE_ADDR']."',lm_user='".$user."' where page_name='".$page."'";
+      $mysqli->query($sql);
+    }
+    if($n>1){
+      $display= "<p align='center'>There is error on pv_counter </p>";
+                  return $display;
+    }
+    $sql="select sum(hits) hits_all from pv_counter";
+    $result=$mysqli->query($sql);
+    $hits_all=$result->fetch_all(MYSQLI_ASSOC);
+    $display="Page hits: ".$hits." Total: ".$hits_all[0]['hits_all'];
+    echo  $display;
+  
   }
 log_pv();
+pv_counter($user='');
+$mysqli->close();
 ?>
+</span>
+</div>
+<div>&nbsp;</div>
+<div>&nbsp;</div>
+<div>&nbsp;</div>
+</div>
+</body>
+</html>