What are some common conventions for naming variables in PHP, such as the Hungarian notation?

When naming variables in PHP, it is important to follow common conventions to ensure code readability and maintainability. One common convention is using camelCase for variable names, where the first word is lowercase and subsequent words are capitalized. Another convention is to use meaningful and descriptive names that reflect the purpose of the variable. Avoid using Hungarian notation, which prefixes variable names with abbreviations indicating their data type, as it is considered outdated and can make code harder to read.

// Example of naming variables using camelCase and meaningful names
$firstName = "John";
$lastName = "Doe";
$age = 30;
$emailAddress = "john.doe@example.com";

// Avoid using Hungarian notation
$strFirstName = "John"; // Avoid using prefixes like "str" for strings
intAge = 30; // Avoid using prefixes like "int" for integers