value of $result?

What is the value of $result in the following PHP cdoe?

<?php
function timesTwo($int)
{
$int = $int*2;
}
$int = 2;
$result = timesTwo($int);
?>


a) 2
b) 0
c) 4
d) Null


You need catchy eyes in order to answer this question correctly...
Solution is d) Null  :P

PHP sitemap.xml generation via DOMDocument

A Sitemap is an XML file that lists the URLs for a site. It allows webmasters to include additional information about each URL: when it was last updated, how often it changes, and how important it is in relation to other URLs in the site. This allows search engines to crawl the site more intelligently. 


An example of generating sitemap.xml using DomDocument is mentioned below:

$doc = new DOMDocument();
$doc->formatOutput = true;


$r = $doc->createElementNS( "http://www.sitemaps.org/schemas/sitemap/0.9","urlset" );
$r->setAttributeNS(
                'http://www.w3.org/2001/XMLSchema-instance',
                'xsi:schemaLocation',
                'http://www.sitemaps.org/schemas/sitemap/0.9             http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd'
                );


$doc->appendChild( $r );
/**
* Home Page
**/
$b = $doc->createElement( "url" );
$loc = $doc->createElement("loc");
$loc->appendChild($doc->createTextNode($SITE_URL));
$b->appendChild( $loc );
        $priority = $doc->createElement( "priority" );
        $priority->appendChild(
                        $doc->createTextNode('1.0')
                        );
        $b->appendChild( $priority );


        $r->appendChild( $b );


        $changefreq = $doc->createElement( "changefreq" );
        $changefreq->appendChild(
                        $doc->createTextNode('Daily')
                        );

       $b->appendChild( $changefreq );

        $lastmod = $doc->createElement( "lastmod" );

        $lastmod->appendChild(

                        $doc->createTextNode(date('Y-m-d'))

                        );

        $b->appendChild( $lastmod );

        $r->appendChild( $b );

/** repeat this for all pages on your site **/

$output = $doc->saveXML();

header("Content-type:text/xml");

echo $output;

Value of $a?

What is the value of $a?


<?php
$a=in_array('01',array('1'))==var_dump('01'==1);
?>


a) True
b) False
c) Syntax Error
d) Null


At first, answer seems to False because 01 being a string is not equal to 1. ryt?
But 01 here is an octal number and it equals the 1 that is decimal...
therefore answer is
a) True
any confusion?