Arrays

Define an array

// Define an array.
$my_array = [a,b,c,d];

// Define an array (the old standard way < php 5.3).
$my_array = array(a,b,c,d);

Get the last element of an array

$lastEl = array_pop((array_slice($array, -1)));

Count the number of element in an array

$total = count($array);