What are the recommended naming conventions for database columns and variables in PHP to ensure clarity and consistency in code readability and maintenance?

Using clear and consistent naming conventions for database columns and variables in PHP is crucial for code readability and maintenance. It is recommended to use descriptive names that convey the purpose of the column or variable, avoid abbreviations, and follow a consistent naming style such as camelCase or snake_case. This helps other developers understand the code more easily and reduces the chances of errors or confusion.

// Example of using clear and consistent naming conventions for variables in PHP
$firstName = "John";
$lastName = "Doe";
$age = 30;

// Example of using clear and consistent naming conventions for database columns in PHP
$query = "SELECT first_name, last_name, age FROM users WHERE id = 1";