How can PHP developers improve code readability and avoid errors when reassigning variables like $color in their scripts?

PHP developers can improve code readability and avoid errors when reassigning variables like $color by using meaningful variable names and avoiding reusing the same variable name for different purposes within the same scope. By clearly defining the purpose of each variable and avoiding variable reuse, developers can make their code easier to understand and maintain.

// Example of improving code readability and avoiding errors when reassigning variables
$background_color = 'blue';
$text_color = 'white';

// Later in the code
$button_color = 'green';