function odd($x)
{
if ($x == 0) {
return false;
} else {
return even($x - 1);
}
}
function odd()
{
return negate(even());
}
/**
*
*/
function loop(array $bindings)
{
$args = func_get_args();
$exprs = rest($args);
if (!even(count($bindings))) {
throw new Exception('Bindings should be an array with an even number of values');
}
}
<?php
function even($var)
{
if ($var % 2 == 0) {
return true;
} else {
return false;
}
}
var_dump(even(6));
<?php
// Simple variable that stores a function to return if the number is even
$even = function ($number) {
return $number % 2 ? null : $number;
};
echo "Using first class functions the result is: " . $even(12) . "\n";
// Of course the prev example can be done imperative with a function as follows:
function even($number)
{
return $number % 2 ? null : $number;
}
echo "Using a function the result is: " . even(12);
