<?php
$size = sizeof($array);
$size = count($array);
delete($filepath);
unset($filepath);

// No errors thrown for class methods.
$size = MyClass::sizeof($array);
$size = MyClass::count($array);
MyClass::delete($filepath);
MyClass::unset($filepath);

$size = $class->sizeof($array);
$size = $class->count($array);
$class->delete($filepath);
$class->unset($filepath);

function delete() {}
function unset() {}
function sizeof() {}
function count() {}
?>