What are some key differences between variables and functions in PHP, and how can they be correctly identified?

Variables in PHP are used to store data values, while functions are blocks of code that can be called to perform a specific task. One key difference between variables and functions is that variables hold data values, such as strings or numbers, while functions contain executable code. To correctly identify variables and functions in PHP, variables are typically assigned a value using the assignment operator "=", while functions are defined using the "function" keyword followed by a function name and a block of code enclosed in curly braces.

// Example of a variable
$myVariable = "Hello, World!";

// Example of a function
function myFunction() {
    echo "This is a function.";
}