twitter-proxy.php

proxy-twitter.php

<?php
	$query = $_GET["q"];
	if (!isset ($query)) echo 'NO QUERY PASSED TO TWITTER PROXY';

	$cache = dirname(__FILE__) . '/cache/twitter-' . urlencode($query) . '.txt';

	//  How long we'll allow the cached file to live.
	$cacheDur = 60 * 3;
	
	//  Check if cached file exist and if it's older than a specific number of seconds
	//  (1 hour is 3.600 seconds)
	if (!file_exists($cache) || filemtime($cache) < (time() - $cacheDur)) {
		$result = file_get_contents('http://search.twitter.com/search.json?q=' . urlencode($query), true);

	    //  Cached data either didn't exist or was to old. Let's (re)create it.
	    //  'wb' supposedly means write binary. It's not documented in the php docs here: http://php.net/manual/en/function.fopen.php
	    //  Read more about 'wb' here: http://stackoverflow.com/questions/3824051/why-does-my-server-keep-creating-new-files-with-0640-permissions-in-my-php-fwrite
	    $cachefile = fopen($cache, 'wb');
	    fwrite($cachefile, $result);
	    fclose($cachefile);
	}else {
	    //  Cached text file with tweet data exists and isn't too old so just load that
	    $result = file_get_contents($cache);
	}

	//  Right now our tweets data is just one big string, so let's decode it into JSON
	echo $result;
?>