Get's a Google Plus stream in JSON and caches locally for display elsewhere

getGooglePlus.php

// JDR: who you are, and how many results you want
$myGooglePlusUser 	= "{YOUR_GOOGLE_PLUS_ID_NUMBER_HERE}";
$myGooglePlusMaxResults = 20;

// JDR: get your Google API key from the APIs Console: https://code.google.com/apis/console#access
$myGoogleAPIkey 	= "{YOUR_API_KEY_HERE}";
$myGooglePlusQuery	= "https://www.googleapis.com/plus/v1/people/" . $myGooglePlusUser . "/activities/public?alt=json&maxResults=" . $myGooglePlusMaxResults . "&fields=items(object(attachments(categories%2Ccontentsource%2CdisplayName%2CobjectType%2Curl)%2Curl))&pp=1&key=" . $myGoogleAPIkey;

$myCacheFile 		= "me.json"; 	// JDR: name the cache file whatever you like
$myCacheCycle 		= "600"; 		// JDR: in seconds

// JDR: technically we don't need this really, but if you ever need other header info, this is the way
$setContextOptions = array(
	'http'=> array(
    	'method'=>"GET"
	)
);
$createContext = stream_context_create($setContextOptions);

// JDR: let's get our cache file, returns false if file does not exist
$getCacheFileModTime = @filemtime( $myCacheFile );

if ( !$getCacheFileModTime || ( time() - $getCacheFileModTime >= $myCacheCycle) )
{
	// JDR: go get me some json, returns false if error
	$getGooglePlusData = file_get_contents($myGooglePlusQuery, false, $createContext);
	
	if ($getGooglePlusData) {
		
		// write the JSON to file, return it to the caller
		file_put_contents( $myCacheFile, $getGooglePlusData );
		$outputJSON = $getGooglePlusData;
	}
	else {
		// JDR: uh oh, we have a problem, write some simple error json to tell us on the frontend
		$errorArray = array('error' => 'There was a problem getting data from the Google API, please try again.');
		$outputJSON = json_encode($errorArray);
	}
} 
else 
{
	// JDR: get the cache file
	$outputJSON = file_get_contents($myCacheFile);
}

// JDR: gzip it if we can
ob_start('ob_gzhandler');
header('Content-type: application/json');
echo $outputJSON;