Discussion on: My beloved PHP cheat sheet

<?php

//Naming convention
$first_name = 'Mike'. // all lower case with underscore separators
function updateProduct() // camelCase
class ProductItem // StudlyCaps
const ACCESS_KEY = '123abc'; // all upper case with underscore separators

//output
echo 'Hello World';

//variable declaration
$name = 'Mike'; //string
$isActive = true; //boolean
$number = 25; //integer
$amount = 99.95; //float
...