Page with memcache

PageCachable.php

<?php

class PageCachable {

  private $memcache,
    $memcacheOptions = [
      'enabled' => FALSE,
      'host' => 'localhost',
      'port' => '11211',
      'lifetime' => 10800,
    ];
  
  /**
   * Instantiate a new Jobs page class.
   */
  public function __construct() {
    $this->memcacheOptions['enabled'] = (getenv('MEMCACHE_ENABLED')) ?: $this->memcacheOptions['enabled'];
  }
  
  /**
   * Connect to cache backend.
   */
  private function cacheConnect() {
    if (!class_exists('Memcache')) return FALSE;
    $this->memcache = new Memcache;
    $this->memcache->connect(
      $this->memcacheOptions['host'], $this->memcacheOptions['port']
    ) or die ("Could not connect to cache.");
    return TRUE;
  }

  /**
   * Set content to a cache backend.
   * @param string $cid
   * @param string $content
   */
  private function cacheSet($cid, $content) {
    $this->memcache->set(
      $cid, $content, FALSE, $this->memcacheOptions['lifetime']
    ) or die ("Failed to save data to cache.");
    return TRUE;
  }

  /**
   * Get content from a cache backend.
   * @param string $cid
   * @return string|boolean
   */
  private function cacheGet($cid) {
    if ($output = $this->memcache->get($cid)) {
      return $output;
    }
    return FALSE;
  }

  /**
   * Build the page from scratch.
   */
  private function build() {
    // Database lookups, API calls, etc.
    $output = [
      'title' => 'THERE YOU GO',
      'content' => 'NEATO',
    ];
    return $output;
  }

  /**
   * Obtain page for template, handle alternate modes.
   * @return array
   */
  public function get() {
    // Use a cached version (production).
    if ($this->memcacheOptions['enabled'] && $this->cacheConnect()) {
      $output = unserialize($this->cacheGet('pageVars'));
      if (!$output || !is_array($output)) {
        $output = $this->build();
        $this->cacheSet('pageVars', serialize($output));
      }
    }
    else {
      $output = $this->build();
    }
  }

}