How to check transaction errors in php

How to check transaction errors in php: By using the "try-catch" mechanism and the "PDOException" exception class to check, when performing database operations, the code execution in the try block may cause a PDOException exception, here In this case, pass the control flow to the catch block and handle the exception as needed.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

Check transaction errors in php by using the "try-catch" mechanism and the "PDOException" exception class

When performing database operations, code execution in the try block may throw a PDOException exception (for example, a database insert operation fails due to a unique key conflict). In this case, pass control flow into the catch block and handle the exception as needed.

The following is an example:

try {
    $conn = new PDO("mysql:host=localhost;dbname=myDB", "username", "password");
    $conn->beginTransaction();
    // execute database queries here
    $conn->commit();
} catch (PDOException $exception) {
    $conn->rollBack();
    echo "Transaction failed: " . $exception->getMessage();
}

In this example, a connection to the database is established, a transaction is started, and an attempt is made to execute some Database operations. If any operation throws a PDOException, we rollback the transaction and print out an error message.

Note that this is just a simple example. In a real application, you may want to add more logic to log errors or trigger other actions to handle errors.

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