What are the best practices for naming variables in PHP scripts to ensure clarity and readability?

When naming variables in PHP scripts, it is important to use descriptive names that clearly indicate the purpose or content of the variable. Avoid using abbreviations or single-letter variable names, as these can be confusing to other developers reading your code. Instead, use camelCase or snake_case to separate words in variable names for better readability.

// Example of naming variables in PHP using descriptive names
$firstName = "John";
$lastName = "Doe";
$emailAddress = "john.doe@example.com";

// Avoid using single-letter variable names or abbreviations
// Incorrect example:
$f = "John";
$l = "Doe";
$email = "john.doe@example.com";