SELECT gives old values after UPDATE - php

Question

I get value from the table, change it and update the value in the table. After that I try to select this value from the table, but it gives old value that was before updating. In the phpmyadmin I see that value was changed. I can't see what is wrong.
require_once('conn.php');
$query = "SELECT first FROM vote WHERE id = 1";
$result = mysqli_query($conn, $query);
$value = $result->current_field;
echo $value."<br>";
$newvalue = $value + 1;
echo $newvalue;
$sql = "UPDATE vote SET first = ".$newvalue." WHERE id = 1";
$do = mysqli_query($conn, $sql);
$conn->close();

Answer 1

Try to do like that:
require_once('conn.php');
$query = "SELECT first FROM vote WHERE id = 1";
$result = mysqli_query($conn, $query);
if($result){
if($row = mysqli_fetch_assoc($result){
$value = $row['first'];
echo $value."<br>";
$newvalue = $value + 1;
echo $newvalue;
$sql = "UPDATE vote SET first = $newvalue WHERE id = 1";
$do = mysqli_query($conn, $sql);
$conn->close();
}
}

Answer 2

Try adding a commit after "update" statement.
$sql = "UPDATE vote SET first = ".$newvalue." WHERE id = 1; COMMIT;";
You may want to create a function for commit.
function commit(){
return mysql_query("COMMIT", $this->connection);
}
reference: http://php.net/manual/en/function.mysql-query.php
Also, please provide details about the mysql client version you are using. In newer versions, you can configure autocommit.