What are some best practices for organizing and structuring PHP code to avoid syntax errors?

To avoid syntax errors in PHP code, it is essential to follow best practices for organizing and structuring the code. This includes using proper indentation, consistent naming conventions, and commenting code effectively. Breaking down complex functions into smaller, more manageable parts can also help in identifying and fixing syntax errors more easily. Example:

<?php

// Good practice: Using proper indentation and commenting code
function calculateSum($num1, $num2) {
    // Calculate the sum of two numbers
    $sum = $num1 + $num2;
    return $sum;
}

// Good practice: Using consistent naming conventions
$firstNumber = 10;
$secondNumber = 20;

// Good practice: Breaking down complex functions into smaller parts
$result = calculateSum($firstNumber, $secondNumber);
echo "The sum is: " . $result;

?>