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增加和減少列在每個頁面增加更新 並且不應該發生它應該只發生在按鈕單擊我應該怎麼做? 在這裏,我已經實現了給予好評和downvote機制每頁刷新增加和減計數?
//給予好評和downvote
<?php
if(isset($_POST['up']))
{
$string= $_POST['up'];
$d= substr($string,0,2);
$t = ltrim($d, '0');
$id1=$id;
$conn1=new mysqli('localhost','root','','forum') or die(mysql_error());
$stmt1= $conn1->prepare("UPDATE messages SET upcount = (upcount+1) WHERE mid ='".$t."' ");
$stmt1->execute();
$stmt1->close();
}
if(isset($_POST['down']))
{
$string1= $_POST['down'];
$d1= substr($string1,0,2);
$t1 = ltrim($d1, '0');
echo $t1;
$conn1=new mysqli('localhost','root','','forum') or die(mysql_error());
$queryd=mysqli_query($conn1,"SELECT upcount FROM messages where messages.mid='".$t1."'");
$row=mysqli_fetch_assoc($queryd);
$up=$row['upcount'];
if($up>0)
$id1=$id;
$conn1=new mysqli('localhost','root','','forum') or die(mysql_error());
if($up>0)
{
$stmt2= $conn1->prepare("UPDATE messages SET downcount = (downcount+1) WHERE mid ='".$t1."'");
}
$stmt2->execute();
$stmt2->close();
$conn1->close();
}
當請求頁面刷新時,瀏覽器是否要求將「表單數據」重新發送到服務器? –
是的upcount增加了兩次,但即使頁面刷新,我也希望它一次。但是頁面刷新後它工作正常。 – Theon
然後它是預期的行爲。 「重新發送」實際上意味着另一個POST。另請參閱http://stackoverflow.com/questions/4327236/stop-browsers-asking-to-resend-form-data-on-refresh –