学习和应用PHP编写规范：改进代码质量的方法论

function myFunction() {
    if ($condition) {
        // do something
    } else {
        // do something else
    }
}

$myVariable = 123;

function myFunction($myParameter) {
    // do something
}

class MyClass {
    public function myMethod() {
        // do something
    }
}

/**
 * This function calculates the sum of two numbers.
 * 
 * @param int $num1 The first number.
 * @param int $num2 The second number.
 * @return int The sum of the two numbers.
 */
function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

// This is a comment for the code below
$sum = calculateSum(1, 2);
echo $sum;

try {
    // some code that may throw an exception
} catch (Exception $e) {
    // handle the exception
}

/**
 * This function calculates the sum of two numbers.
 * 
 * @param int $num1 The first number.
 * @param int $num2 The second number.
 * @return int The sum of the two numbers.
 */
function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

class MyClass {
    /**
     * This method prints a greeting message.
     * 
     * @param string $name The name of the person to greet.
     * @return void
     */
    public function greet($name) {
        echo "Hello, " . $name;
    }
}