تابع ‎intval()‎‎ در PHP

<?php
$a = 32;
echo intval($a) . "<br>";

$b = 3.2;
echo intval($b) . "<br>";

$c = "32.5";
echo intval($c) . "<br>";

$d = array();
echo  intval($d) . "<br>";

$e = array("red", "green", "blue");
echo intval($e)  . "<br>";
?>