How can PHP developers improve code readability and maintainability by adhering to the principle of one statement per line?

When PHP developers adhere to the principle of one statement per line, it improves code readability and maintainability by making it easier to understand and debug code. Each statement is clearly separated, making it easier to follow the logic of the code. Additionally, it allows for easier tracking of changes and modifications in the codebase.

// Bad practice - multiple statements on a single line
$variable1 = 10; $variable2 = 20; $total = $variable1 + $variable2;

// Good practice - one statement per line
$variable1 = 10;
$variable2 = 20;
$total = $variable1 + $variable2;