Mysql: Transaction with php+mysql

<?php
mysql_connect("localhost", "test_user", "test_password");
mysql_select_db("work");

//transaction begin
mysql_query("BEGIN");
$sorgu1 = mysql_query("UPDATE test SET mevcut_para = mevcut_para – 10000 WHERE hesap_no = '625021'");
$sorgu2 = mysql_query("UPDATE test1 SET mevcut_para = mevcut_para + 10000 WHERE hesap_no = '124500'");

if (!$sorgu1 or !$sorgu2 ){
 mysql_query("ROLLBACK");
}else{
 mysql_query("COMMIT");
}
?>