更新查询无法按预期工作

Question

i have this simple update query :

update `table_name` set `count` = `count` + 1 where `id` = '$id'

But every time i reload the page the count is incremented by 2 in the db. What is going on here? Thanks..

Answer 1

It's a browser issue. Your browser visit page twice.

Why it could be:

• Your page contains img or script without or empty src attr.
• Request to favicon lead to your page.
• Your browser has extension which send extra requests.
• Your css contains something like this: {background-image: url();}

Explore your browser console for requests.

Answer 2

Try Below Code : Fetch count first from that table and increment it and then update the table

$count = SELECT count(*) FROM `table_name`
$count1 = $count + 1;
update `table_name` set `count` = '$count1' where `id` = '$id'

Answer 3

Try declaring a variable before you call it in the query like this : Also im not sure if your 'count' is a string or also a variable.

$count2 = 'count' + 1;
update `table_name` set `count` = '$count2' where `id` = '$id'