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<?php

// NOTE THAT begin_transaction() REQUIRES PHP 5.5+

$db = new mysqli('localhost', 'user', 'pass', 'db');

$db->begin_transaction();

$query = "UPDATE `nicl_students` SET `total` = 100 WHERE `id_students` = 127760";
$results = $db->query($query);

$query = "UPDATE `nicl_students` SET `total` = 200 WHERE `id_students` = 127760";
$results = $db->query($query);

$db->commit(); // This will end the first transaction



// query without transactions
$query = "UPDATE `nicl_students` SET `total` = 300 WHERE `id_students` = 127760";
$results = $db->query($query);



$db->begin_transaction();

$query = "UPDATE `nicl_students` SET `total` = 400 WHERE `id_students` = 127760";
$results = $db->query($query);

$db->commit(); // This will end the second transaction

?>