<pre>&lt;?php
	// 
	// index.php
	//
	// This is the source code for the KingOfTheHill application.  
	// All the application logic is on this page.
	//
	// This code can be freely copied, modified, and distributed.  
	//    

	// If someone wants to view the source, then dump it out.
	if( isset( $_GET[&quot;source&quot;] ) ) {
		echo &quot;&lt;pre&gt;&quot;;
		echo htmlentities( file_get_contents( &quot;index.php&quot;) );								
		echo &quot;&lt;/pre&gt;&quot;;
		exit;
	}

	// $strRoot will be the URL to this page
	$strPath = str_replace( &quot;\\&quot;, &quot;/&quot;, $_SERVER['REQUEST_URI'] );
	$aPath = explode( &quot;?&quot;, $strPath);
	$strRoot = &quot;http://&quot; . $_SERVER['SERVER_NAME'] . &quot;:&quot; . $_SERVER['SERVER_PORT'] . $aPath[0];
	if ($strRoot[strlen($strRoot)-1] != &quot;/&quot;)
		$strRoot .= &quot;/&quot;;

	// $strPicnikUrl is the URL that we use to launch Picnik.
	$strPicnikUrl = &quot;http://www.picnik.com/service&quot;;
	
	// You can get your own API key at http://www.picnik.com/info/api
	$apikey = &quot;a77f917f0058eb066a87af4d8a540960&quot;;
	
	// $aPicnikParams collects together all the params we'll give Picnik.  Start with an API key
	$aPicnikParams['_apikey'] = $apikey;
	
	// tell Picnik where to send the exported image
	$aPicnikParams['_export'] = $strRoot;
	
	// give the export button a title
	$aPicnikParams['_export_title'] = &quot;King Me!&quot;;
	
	// turn on the close button, and tell it to come back here
	$aPicnikParams['_close_target'] = $strRoot;
	
	// send in the previous &quot;king&quot; image in case the user feels like decorating it
	$aPicnikParams['_import'] = $strRoot . &quot;img/king.jpg&quot;;
	
	// tell Picnik to redirect the user to the following URL after the HTTP POST instead of just redirecting to _export
	$aPicnikParams['_redirect'] = $strRoot . &quot;?coronation&quot;;
	
	// tell Picnik our name.  It'll use it in a few places as appropriate
	$aPicnikParams['_host_name'] = &quot;King Of The Hill&quot;;
	
	// turn off the &quot;Save &amp; Share&quot; tab so users don't get confused
	$aPicnikParams['_exclude'] = &quot;out&quot;;
	
	// See if we've been given a new picture to use as the king. 
	// Note that the when Picnik is exporting from its servers, this page will be hit TWICE.  
	// Once will be the POST with the image data contained in $_FILES.  The second will be
	// a GET of the _redirect URL we passed in above.
	if (isset($_FILES['file'])) {
		// retrieve the image's attributes from the $_FILES array
		$image_tmp_filename = $_FILES['file']['tmp_name'];	
		$image_data = file_get_contents( $image_tmp_filename );
		file_put_contents( &quot;img/king.jpg&quot;, $image_data );	
	}
	if (isset($_POST['address'])) {
		$address = htmlentities( $_POST['address'] );
		file_put_contents( &quot;img/address.txt&quot;, $address );
	} else {
		// read in the &quot;address.txt&quot; file so that we know what to call the King.
		// This data was posted to us from the Picnik server on a previous call.
		$address = @file_get_contents( &quot;img/address.txt&quot; );
	}

	// When you're debugging this kind of application, keep in mind that Picnik will
	// invoke your script twice: once with the POST'd data, and then again with
	// a GET to the value of the _redirect parameter.  To see what happens
	// on the first (POST) call, you can use something like the below to dump 
	// variables to a debug file.
	//$debug = &quot;&quot;;
	//$debug .= &quot;\n\nFILES: &quot; . print_r($_FILES, true);
	//$debug .= &quot;\n\nPOST: &quot; . print_r($_POST, true);
	//$debug .= &quot;\n\nGET: &quot; . print_r($_GET, true);
	//file_put_contents( &quot;img/debug.&quot; . time() . &quot;.txt&quot;, $debug);

?&gt;
&lt;html&gt;
&lt;head&gt;
	&lt;title&gt;Picnik Sample: King Of The Hill&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;h2&gt;Welcome to King Of The Hill!&lt;/h2&gt;
&lt;p&gt;King Of The Hill is an easy game to play.  Just use Picnik to upload a photo, and &lt;b&gt;you win!&lt;/b&gt;&lt;/p&gt;
&lt;p&gt;&lt;font size=&quot;-1&quot;&gt;(King Of The Hill is a Picnik API sample that demonstrates how to receive an image from Picnik's servers via HTTP POST.  You can &lt;a href=&quot;index.php?source&quot;&gt;view the source code&lt;/a&gt; for this page.&lt;/font&gt;)&lt;/p&gt;
&lt;?php 
	if( isset( $_POST[&quot;coronation&quot;] ) ) {
		echo &quot;&lt;hr/&gt;&quot;;
		
		echo &quot;&lt;h3&gt;You're the new King!  Congratulations, &quot; . $_POST[&quot;coronation&quot;] . &quot;!&lt;h3&gt;&quot;;
	} else {
		// echo a form so that new Kings can be crowned
		echo &quot;&lt;hr/&gt;&quot;;
		echo &quot;&lt;h3&gt;Become the new King!&lt;/h3&gt;&quot;;
		echo	&quot;&lt;p&gt;Just tell us how you would like to be addressed at your coronation:&lt;/p&gt;\n&quot;;
		echo &quot;&lt;form method='POST' action='$strPicnikUrl'&gt;\n&quot;;
		
		// put all the API parameters into the form as hidden inputs
		foreach( $aPicnikParams as $key =&gt; $value ) {
			echo &quot;&lt;input type='hidden' name='$key' value='$value'/&gt;\n&quot;;
		}
		
		// anything that doesn't start with an underscore will be sent back to us.  
		// We'll use the &quot;coronation&quot; value to determine when we've got a new King.
		echo &quot;&lt;input type='text' name='address' value='Your Majesty'/&gt;\n&quot;;
		echo &quot;&lt;input type='submit' value='Crown Me!'/&gt;\n&quot;;
		echo &quot;&lt;/form&gt;&quot;;
	}
?&gt;
&lt;hr/&gt;
&lt;h2&gt;Long Live The King!&lt;/h2&gt;
&lt;img src=&quot;img/king.jpg?&lt;?php echo microtime(true); /* cache busting */ ?&gt;&quot; border=&quot;0&quot;&gt;
&lt;p&gt;The King would like to be addressed as &lt;b&gt;&quot;&lt;?php echo $address ?&gt;&quot;&lt;/b&gt;.&lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;</pre>