What are some best practices for naming variables in PHP to avoid confusion and errors?

When naming variables in PHP, it is important to follow certain best practices to avoid confusion and errors. Some common practices include using descriptive names that clearly indicate the purpose of the variable, avoiding reserved keywords or special characters, using camelCase or snake_case for multi-word variables, and being consistent with naming conventions throughout your code.

// Example of using descriptive variable names and camelCase
$firstName = "John";
$lastName = "Doe";

// Example of avoiding reserved keywords and special characters
$userAge = 30;
$totalAmount = 100.50;

// Example of using snake_case for multi-word variables
$user_email = "john.doe@example.com";