What are the potential pitfalls of not implementing safeguards against multiple executions of PHP scripts triggered by button clicks?

Without safeguards against multiple executions of PHP scripts triggered by button clicks, users can unintentionally trigger the same script multiple times by clicking the button repeatedly. This can lead to duplicate data entries, processing the same task multiple times, or other unintended consequences. To prevent this, you can implement a simple check to ensure that the script is only executed once, even if the button is clicked multiple times. 

// Check if the script has already been executed
if (!isset($_SESSION['script_executed'])) {
    // Set a flag in the session to mark the script as executed
    $_SESSION['script_executed'] = true;
    
    // Your script logic goes here
}

Keywords

concurrency race condition session locking database transactions PHP session management

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