apicache/apicache.php at master · batnom/apicache · GitHub

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<?php

	/////////////////////////////////////////
	// API CACHE
	/////////////////////////////////////////

	// Settings

	$default_cache = "1 HOUR";

	/* ************************************

	// Notes

	- A simple PHP script with database backend to cache API responses
	- Slot in your own database handler

	// Usage

	$data = GetDataCacheOrLive("URLHERE","1 HOUR");		// set cache time
	$data = GetDataCacheOrLive("URLHERE"); 				// uses $default_cache

	// Database Structure

	CREATE TABLE `data_dump` (
	`id` int(11) NOT NULL AUTO_INCREMENT,
	`url` longtext NOT NULL,
	`data` longtext NOT NULL,
	`updated` datetime NOT NULL,
	)

	************************************ */

	// What we call when we want the data

	function GetDataCacheOrLive($url,$cache_time='$default_cache') {

		// Try grab it from the db cache

		$query = "SELECT data FROM data_dump
					WHERE url='$url' AND updated>DATE_SUB(now(), INTERVAL $cache_time) ";

		$result = db_query($query) or die(db_error($query));

		if (db_num_rows($result) > 0) {

			// we have cached data

			while ($row = db_fetch_array($result)) {
				$data = $row['data'];
			}

			return ($data);

		} else {

			// Need to do live call
			// It'll store it in the cache after it gets it

			$data = MakeLiveCall($url);

			return ($data);

		}

	}

	// Live Call

	function MakeLiveCall($url) {

		// Make server call

		$ch = curl_init();
	    $timeout = 0;
	    curl_setopt ($ch, CURLOPT_URL, $url);
	    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt ($ch, CURLOPT_FOLLOWLOCATION,TRUE);
		curl_setopt ($ch, CURLOPT_MAXREDIRS,2); //only 2 redirects
	    curl_setopt ($ch, CURLOPT_USERAGENT , "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
	    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
	    $rawdata = curl_exec($ch);
	    curl_close($ch);

		// Store response

		$stored = StoreResponse($url,$rawdata);

		// Return

		return $rawdata;

	}

	// Store response

	function StoreResponse($thisurl,$thisdata) {

		// Try grab it from the db

		$query = "SELECT data FROM data_dump
					WHERE url='$thisurl' ";

		$result = db_query($query) or die(db_error($query));

		if (db_num_rows($result) > 0) {

			// Need to UPDATE

			$update_data = array();
			$update_data['data'] = $thisdata;
			$update_data['updated'] = 'NOW()';

			if (db_update($update_data, 'data_dump', "url='$thisurl'")) {
				return 1;
			} else {
				return 0;
			}

		} else {

			// Need to INSERT

			$insert_data = array();
			$insert_data['url'] = $thisurl;
			$insert_data['data'] = $thisdata;
			$insert_data['updated'] = 'NOW()';

			if (db_insert($insert_data, 'data_dump')) {
				return 1;
			} else {
				return 0;
			}

		}

		return 0;

	}

?>