initial Redis Thinger (RedCache)

RedCache.php

<?php
/**
 * RedCache : Redis Cacher Interface
 * @version 2014-10-20 13:16
 * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
 */

/** Set Constants and default path for all includes */
if(!@include_once("{$_SERVER['PHP_REPORT_BASE_DIR']}/include/_constants.php")) { print "Could not Load standard include file. Bailing...\n<br>"; exit(99); }

/*
Requires Redis Server and php5-redis package
   Package: php5-redis
   Status: install ok installed
   Priority: optional
   Section: php
   Installed-Size: 351
   Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
   Architecture: amd64
   Source: php-redis
   Version: 2.2.4-1build2
   Depends: libc6 (>= 2.14), phpapi-20121212
   Suggests: redis-server
   Description: PHP extension for interfacing with Redis
   This extension allows php applications to communicate with the Redis
   persistent key-value store. The php-redis module provides an easy object
   oriented interface.
   Original-Maintainer: Debian PHP PECL Maintainers <pkg-php-pecl@lists.alioth.debian.org>
   Homepage: http://pecl.php.net/package/redis
*/

/**
 * RedCache : Redis Cacher Interface
 * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
 * @package Redis
 * @version 2014-10-20 13:16
 */
class RedCache {
   /**
    * @const KEYSEP KEY Separator String
    */
   const KEYSEP = "\x02:"; //chr(2) . ":"
   const KEYFLAT = ":"; //used when we flatten a keyid

   /** Instance variable defaults to null, when null a new one will be created */
   protected static $instance = null;
   
   /**
    * Get Instance of self, if exists, otherwise create one
    * @version 2014-10-20 13:23
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    * @return RedCache
    */
   protected static function getInstance() {
      if (is_null(self::$instance)) { self::$instance = new self; }
      return self::$instance;
   }

   /** redis
    * @var Redis Redis Class Object
    */
   protected $redis ;
   
   /**
    * Consructor
    */
   protected function __construct() {
      $this->redis = new Redis();
      $this->redis->connect('localhost',6379,'60');
   }

   /**
    * Generate Redis Key based on prefix, middle (key) , and end $keyid
    * @version 2014-10-20 18:06
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    * @param string $prefix
    * @param string $key
    * @param string $keyid
    */
   public static function genKey($prefix,$key,$keyid=NULL) {
      if(is_array($key)) {
         $key = implode(self::KEYSEP,$key);
      } 

      if(is_null($keyid)) {
         return implode(self::KEYSEP,array($prefix,$key));
      } else {
         return implode(self::KEYSEP,array($prefix,$key,$keyid));
      }
   }

   /**
    * Get Last part of Key based on 
    * @version 2014-10-20 18:50
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    * @param string $key description 
    */
   public static function getKeyID($key) {
      $arr = explode(self::KEYSEP,$key,3);
      $tmp = array_pop($arr);
      return implode(self::KEYFLAT,explode(self::KEYSEP,$tmp));
   }

   /**
    * Search Redis Keyspace
    * @version 2014-10-20 18:42
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    * @param string $prefix
    * @param string $key
    * @param string $keyid
    */
   public static function keySpace($prefix,$key) {
      $key = self::genKey($prefix,$key);
      return self::Redis()->keys($key . '*');
   }


   /**
    * Get Info
    * @version 2014-10-20 13:28
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    */
   public static function info() {
      return self::Redis()->info();
   }

   /**
    * Get Redis Interface
    * @version 2014-10-20 13:28
    * @author Steven Hollingsworth <steven.hollingsworth@fresno.gov>
    * @return Redis
    */
   public static function Redis() {
      $r = self::getInstance()->redis;
      return $r;
   }
} 
// Note that it is a good practice to NOT end your PHP files with a closing PHP tag. 
// This prevents trailing newlines on the file from being included in your output, 
// which can cause problems with redirecting users.