What are the best practices for naming variables in PHP scripts to avoid confusion and potential errors?

When naming variables in PHP scripts, it is important to follow best practices to avoid confusion and potential errors. One common practice is to use descriptive names that clearly indicate the purpose or content of the variable. Avoid using vague or ambiguous names that could lead to misunderstandings. Additionally, adhere to a consistent naming convention, such as camelCase or snake_case, to maintain readability and consistency throughout your code.

// Example of using descriptive variable names and camelCase naming convention
$numberOfStudents = 10;
$averageGrade = 85.5;

// Example of using descriptive variable names and snake_case naming convention
$user_name = "JohnDoe";
$email_address = "johndoe@example.com";