چاپ نوع متغیر های مختلف:

<?php
$a = 3;
echo gettype($a) . "<br>";

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

$c = "Hello";
echo gettype($c) . "<br>";

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

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

$f = NULL;
echo gettype($f) . "<br>";

$g = false;
echo gettype($g) . "<br>";
?>