事务无法正常工作-PHP和MySql

Question

I'm beginner to PHP transaction concept. My code is not working. I don't know what is my mistake. Anyone help me to find out my mistake.

My first query is wrong one. It didn't work. Second is successfully executed. If I have checked by IF condition, My control successfully moved to else part. It's fine. But My rollback function not working. Second query date will be present in table.

What is my mistake?

<?php
$link = mysqli_connect("localhost", "root", "", "hrms_db");

/* check connection */
if (mysqli_connect_errno()) {
  printf("Connect failed: %s\n", mysqli_connect_error());
  exit();
}

/* Transaction start */
mysqli_begin_transaction($link, MYSQLI_TRANS_START_READ_WRITE);

/* disable autocommit */
mysqli_autocommit($link, FALSE);

$result1  = mysqli_query($link, "INSERT INTO EmployeeBackup (Name, OfficialEmail, Department, Manager_ID, MobileNO, Status, Location, full_name) value ('s', 's', '1' , '3', '5', '4', '5' , '78')");
$result2 = mysqli_query($link, "INSERT INTO hrms_general_master (lookup_type,   lookup_description) value ('Testing', 'Testing')" );

if($result1 && $result2){
/* commit insert */
mysqli_commit($link);
echo "All queries were executed successfully";
} else{
/* Rollback */
mysqli_rollback($link);
echo "All queries were rolled back";
}

mysqli_close($link);
?>

Then please explain different type of parameter used in mysqli_begin_transaction and use of it. I have little more doubt in mysqli_begin_transaction and mysqli_commit . Please clarify my doubt.

Thank you.

Answer 1

You need the InnoDB access method to use transactions. The people who created MyISAM did not include transactions in their code.

Plenty of tutorials on the net explain DBMS transactions in general, and MySQL transactions in particular. Here is just one. http://www.tutorialspoint.com/mysql/mysql-transactions.htm