mysql - PHP adds one to database on refresh? -


everytime load pages adds 1 database? have button add 1 database not on refresh? ideas? reading, james.

edit: if press remove button , refresh on refresh remove 1 , same remove button click once on refresh takes 1 away no reason.

full code: https://pastebin.com/vsrzranc

$currentsales = "select `sales` `sales` `id` = 1 "; if ($result=mysqli_query($link, $currentsales)) {     $row = mysqli_fetch_array($result); }  //echo $row[sales];  if (isset($_post['utextbox'])) {     $updatesalescutom = $_post['utbtext'];     echo '<div class="udate1 alert alert-info">updating</div>';     $query = "update `sales` set `sales` = `sales` + $updatesalescutom `sales`.`id` = 1";     mysqli_query($link, $query);     echo '<div class="udate2 alert alert-success">successfully updated!</div>'; }  if (isset($_post['usalep1'])) {     echo '<div class="udate1 alert alert-info">updating</div>';     $query = "update `sales` set `sales` = `sales` + 1 `sales`.`id` = 1";     mysqli_query($link, $query);     echo '<div class="udate2 alert alert-success">successfully updated!</div>'; }  if (isset($_post['usaler1'])) {     echo '<div class="udate1 alert alert-info">updating</div>';     $query = "update `sales` set `sales` = `sales` - 1 `sales`.`id` = 1";     mysqli_query($link, $query);     echo '<div class="udate2 alert alert-success">successfully updated!</div>'; }


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