<?php
class overloading
{
function __call($method, $args)
{
if($method == ‘talk’)
{
if(count($args) == 0)
{
$this->sayNothing();
}
elseif(count($args) == 1)
{
if(is_array($args[0]))
{
$this->sayArray($args[0]);
}
else
{
$this->saySentence($args[0]);
}
}
elseif(count($args) == 2)
{
$this->sayTwo($args[0], $args[1]);
}
else
{
return false;
}
}
}

function rawr()
{
echo “rawr”;
}

function sayArray($arr)
{
foreach($arr as $s)
{
$this->saySentence($s .”. “);
}
}

function sayNothing()
{
echo “I have nothing to say.”;
}

function saySentence($sentence)
{
echo $sentence;
}

function sayTwo($first,$second)
{
echo $first . “.<br/>” . $second . “.”;
}
}

$o = new overloading();
$o->rawr();
$o->talk(‘a sentence’);
$o->talk(‘a sentence’,'another sentence’);
$o->talk(array(‘hello I am joey.’,'nice to meet you’));

Bit clumsy isn’t it but you still you will get the flavor of  method overloading. Enjoy……..

$doc = new DOMDocument();
$doc->load(‘books.xml’ );
$books = $doc->getElementsByTagName( “book” );

foreach( $books as $book )
{
$authors    = $book->getElementsByTagName( “author” );
$author     = $authors->item(0)->nodeValue;

$publishers = $book->getElementsByTagName( “publisher” );
$publisher  = $publishers->item(0)->nodeValue;

$titles     = $book->getElementsByTagName( “title” );
$title      = $titles->item(0)->nodeValue;

echo “$title – $author – $publisher”;
echo “<br/>”;
}

<?php

/* settings */
$username = ‘your_user_name’;
$password = ‘your_pass’;
$format   = ‘xml’; //alternative: json
$message  = ‘your message’;

/*******Curl version*********/
$curl = curl_init(‘http://twitter.com/statuses/update.xml’);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, ‘status=’.urlencode($message));
curl_setopt($curl, CURLOPT_USERPWD, $username.’:’.$password);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(‘Expect:’));

$xml = curl_exec($curl);
print $xml;
/******End*****/
curl_close($curl);

after successfully updating your status a xml will be returned.By processing the xml  node you can show a message like  “You status has been updated successfully.”

Enjoy…..

var contactsService;

function setupContactsService() {
contactsService = new google.gdata.contacts.ContactsService(‘exampleCo-exampleApp-1.0′);
}

function logMeIn()
{
var scope = ‘http://www.google.com/m8/feeds’;
var token = google.accounts.user.login(scope);

}

/*

call this function during page load

*/

function initFunc() {
setupContactsService();
logMeIn();
}

/*
* Query for contacts
*/

// Create the contacts service object
function getMyContacts()
{
var contactsService =
new google.gdata.contacts.ContactsService(‘GoogleInc-jsguide-1.0′);
var contactAddressContainer = ”;
// The feed URI that is used for retrieving contacts
var feedUri = ‘http://www.google.com/m8/feeds/contacts/default/full’;
var query = new google.gdata.contacts.ContactQuery(feedUri);

// Set the maximum of the result set to be 50
query.setMaxResults(50);
var callback = function(result)
{
// An array of contact entries
var entries = result.feed.entry;

// Iterate through the array of contact entries
for (var i = 0; i < entries.length; i++)
{
var contactEntry = entries[i];

var emailAddresses = contactEntry.getEmailAddresses();

// Iterate through the array of emails belonging to a single contact entry
for (var j = 0; j < emailAddresses.length; j++)
{
var emailAddress = emailAddresses[j].getAddress();
//PRINT(‘email = ‘ + emailAddress);
contactAddressContainer += ‘<span style=”color:red;”>’+emailAddress+’</span><br/>’;

}
}
//creating a continer for holding contact list
document.getElementById(‘contact_holder’).innerHTML = contactAddressContainer;
}
// Submit the request using the contacts service object
contactsService.getContactFeed(query, callback, handleError);

}
// Error handler
var handleError = function(error)
{
alert(error);
}

code snipplet:

<?php
// A function that will create the initial setup
// for the progress bar: You can modify this to
// your liking for visual purposes:
function create_progress() {
// First create our basic CSS that will control
// the look of this bar:
echo “
<style>
#text {
position: absolute;
top: 100px;
left: 50%;
margin: 0px 0px 0px -150px;
font-size: 18px;
text-align: center;
width: 300px;
}
#barbox_a {
position: absolute;
top: 130px;
left: 50%;
margin: 0px 0px 0px -160px;
width: 304px;
height: 24px;
background-color: black;
}
.per {
position: absolute;
top: 130px;
font-size: 18px;
left: 50%;
margin: 1px 0px 0px 150px;
background-color: #FFFFFF;
}

.bar {
position: absolute;
top: 132px;
left: 50%;
margin: 0px 0px 0px -158px;
width: 0px;
height: 20px;
background-color: #0099FF;
}

.blank {
background-color: white;
width: 300px;
}
</style>
“;

// Now output the basic, initial, XHTML that
// will be overwritten later:
echo “
<div id=’text’>Script Progress</div>
<div id=’barbox_a’></div>
<div class=’bar blank’></div>
<div class=’per’>0%</div>
“;

// Ensure that this gets to the screen
// immediately:
ob_flush();
flush();
}

// A function that you can pass a percentage as
// a whole number and it will generate the
// appropriate new div’s to overlay the
// current ones:

function update_progress($percent) {
// First let’s recreate the percent with
// the new one:
echo “<div class=’per’>{$percent}
%</div>\n”;

// Now, output a new ‘bar’, forcing its width
// to 3 times the percent, since we have
// defined the percent bar to be at
// 300 pixels wide.
echo “<div class=’bar’ style=’width: “,
$percent * 3, “px’></div>\n”;

// Now, again, force this to be
// immediately displayed:
ob_flush();
flush();
}

// Ok, now to use this, first create the
// initial bar info:
create_progress();

// Now, let’s simulate doing some various
// amounts of work, and updating the progress
// bar as we go. The usleep commands will
// simulate multiple lines of code
// being executed.
usleep(350000);                 //after .35 secs
update_progress(7);
usleep(1550000);
update_progress(28);
usleep(1000000);
update_progress(48);
usleep(1000000);
update_progress(68);
usleep(150000);
update_progress(71);
usleep(150000);
update_progress(74);
usleep(150000);
update_progress(77);
usleep(1150000);
update_progress(100);

// Now that you are done, you could also
// choose to output whatever final text that
// you might wish to, and/or to redirect
// the user to another page.
?>

<?php

$cmd = $_REQUEST['cmd'];

switch($cmd)
{
case ‘download’:  header(“Content-type:application/pdf”);
header(“Content-Disposition:attachment;filename=downloaded.pdf”);

// Put the source in the root directory.if you don’t then change the path accordingly.
readfile(“php5_power_programming.pdf”);
break;

default         : break;
}
?>

Client side:

Simply call the above  script according to the following way:

<a href=”/file_download.php?cmd=’download’ “>download</a> or the you can do it with a little bit help of javascript.

that’s enough.Very simple.Isn’t it?

For details you can go through http://www.w3.org/TR/html5-diff

Major New features in PHP 5.3

• Name spaces

• Late Static Binding

• MySQL Native Driver

• Additional OpenSSL Functions.

• Improved Command Line Parameter Support

• XSLT Profiling

• New Error Levels

For details you can go through http://articles.sitepoint.com/article/whats-new-php-5-3