How can developers improve code readability and maintainability in PHP scripts to avoid confusion and errors?

To improve code readability and maintainability in PHP scripts, developers can follow best practices such as using meaningful variable names, commenting their code effectively, breaking down complex tasks into smaller functions, and adhering to coding standards like PSR-1 and PSR-2.

// Example of improved code readability and maintainability in PHP

// Using meaningful variable names
$full_name = "John Doe";
$age = 30;

// Commenting the code effectively
// Calculate the sum of two numbers
function sum($num1, $num2) {
    return $num1 + $num2;
}

// Breaking down complex tasks into smaller functions
function calculate_total_price($price, $quantity) {
    return $price * $quantity;
}

// Adhering to coding standards like PSR-1 and PSR-2
class ExampleClass {
    public function exampleMethod() {
        // Method implementation
    }
}