What should I do if the php transaction cannot be rolled back?

Solution to the problem that PHP transactions cannot be rolled back: 1. Open the corresponding PHP file; 2. Check the "function update_user_set_date_of_birth($date_of_birth){...}" code; 3. Pass "$this-> Mysqli->autocommit(false);" can be used to turn off automatic submission.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

What should I do if the php transaction cannot be rolled back?

Problem description:

About php transaction not performing rollback

mysqliphptransactions
Transactions not doing the rollback

I have the function of updating users:

function update_user_set_common($date_of_birth, $mobile, $street, $housenumber, $addition, $postal_code, $location, $country)
{
    try {
        $this->mysqli->begin_transaction();
        $this->update_user_set_date_of_birth($date_of_birth);
        $this->update_user_set_mobile($mobile);
        $this->update_user_set_address($street, $housenumber, $addition, $postal_code, $location, $country);
        $this->mysqli->commit();
        return true;
    } catch (Exception $e) {
        $this->mysqli->rollback();
        echo"Error:" . $e;
        return false;
    }
}

As you can see, I made a transaction. If everything is OK, it should be committed, if an error occurs, it should be rolled back.

Here's an example of how my update query works:

function update_user_set_date_of_birth($date_of_birth)
{
    return $this->update_user_set_singlefield(COL_USER_DATE_OF_BIRTH, $date_of_birth);
}
function update_user_set_singlefield($field, $value)
{
    if ($update_stmt = $this->mysqli->prepare("UPDATE" . TABLE_USER ." SET" . $field ." = ? WHERE" . COL_USER_ID ." = ?")) :
        if (!$update_stmt->bind_param("ss", $value, $this->USER_ID)) :
            $update_stmt->close();
            return false;
        endif;
        if (!$update_stmt->execute()) :
            $update_stmt->close();
            return false;
        else :
            $update_stmt->close();
            return true;
        endif;
    else :
        return false;
    endif;
}

So now for example update_user_set_mobile fails, but there is no rollback. The statement before update_user_set_date_of_birth will still be executed and will not change back to the original one.

Why is there no rollback?

Example creating table to show me using innodb:

CREATE TABLE `USER` (
  `USER_ID` bigint(20) NOT NULL PRIMARY KEY AUTO_INCREMENT,
  `USER_E_MAIL` varchar(255) COLLATE utf8_bin NOT NULL,
  `USER_PASSWORT` varchar(255) COLLATE utf8_bin NOT NULL,
  `USER_PASSWORT_SALT` varchar(255) COLLATE utf8_bin NOT NULL,
  `USER_FIRSTNAME` varchar(255) COLLATE utf8_bin NOT NULL,
  `USER_LASTNAME` varchar(255) COLLATE utf8_bin NOT NULL,
  `USER_DATE_OF_BIRTH` varchar(200) COLLATE utf8_bin DEFAULT NULL,
  `USER_MOBILE` varchar(255) COLLATE utf8_bin DEFAULT NULL,
  `ADDRESS_ID` bigint(20) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

Problem solved:

Turn off autocommit instead of mysqli-> begin_transaction();

$this->mysqli->autocommit(false);

http://php.net/manual/zh/mysqli.autocommit.php

Recommended learning: "PHP Video Tutorial"

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