What are the best practices for structuring PHP code to ensure proper execution and error handling?

To ensure proper execution and error handling in PHP code, it is important to follow best practices such as using try-catch blocks to handle exceptions, validating user input to prevent vulnerabilities, and organizing code into functions or classes for better maintainability. 

try {
    // PHP code that may throw exceptions
} catch (Exception $e) {
    // Handle the exception, log it, or display an error message
}

// Example of validating user input
$userInput = $_POST['username'];
if (empty($userInput)) {
    echo "Username cannot be empty";
}

// Example of organizing code into a function
function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

Keywords

exception handling namespaces autoloaders error reporting try-catch block

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