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使用 eAccelerator加速PHP代码的方法

Jun 13, 2016 pm 12:31 PM
eaccelerator php code use accelerate method of

eAccelerator 真是一个好东西(它的前身是truck-mmcache)。 

简单来讲它是一套配合PHP(支持PHP5)运作的缓存系统,通过共享内存或磁盘文件方式交换数据。 

它被广为使用的是PHP源码“编码”(不太贴切的称为“加密”)和缓存PHP执行的中间码以加速。关于 eA 的安装使用的文章已经很多而且也很详细了,这次我想推荐的是用它辅助程序设计缓存,它提供了一组API如下: 

是一个非常便捷而又稳定的本机缓存实现方式,目前这部分设计似乎只支持于共享内存,所以只能用于 Unix -Like OS 了,windows的就没这个福气了。 

1. eaccelerator_put($key, $value, $ttl=0) 
  将 $value 以 $key 为键名存进缓存(php4下支持对像类型,看源码好像zend2里不支持了),$ttl 是这个缓存的生命周期,单位是秒,省略该参数或指定为 0 表示不限时,直到服务器重启清空为止。 

2. eaccelerator_get($key) 
  根据 $key 从缓存中返回相应的 eaccelerator_put() 存进去的数据,如果这项缓存已经过期或不存在那么返回值是 NULL 

3. eaccelerator_rm($key) 
  根据 $key 移除缓存 

4. eaccelerator_gc() 
  移除清理所有已过期的 key  

5. eaccelerator_lock($key) 
  为 $key 加上锁定操作,以保证多进程多线程操作时数据的同步。需要调用 eaccelerator_unlock($key) 来释放这个锁或等待程序请求结束时自动释放这个锁。 
  例如: 
      eaccelerator_lock("count"); 
    eaccelerator_put("count",eaccelerator_get("count")+1)); 
  ?> 

6. eaccelerator_unlock($key) 
  根据 $key 释放锁 

7. eaccelerator_cache_output($key, $eval_code, $ttl=0) 
  将 $eval_code 代码的输出缓存 $ttl 秒,($ttl参数同 eacclerator_put) 
   For Example: 
   

8. eaccelerator_cache_result($key, $eval_code, $ttl=0) 
  将 $eval_code 代码的执行结果缓存 $ttl 秒,($ttl参数同 eacclerator_put),类似 cache_output 
   For Example: 
   

9. eaccelerator_cache_page($key, $ttl=0) 
  将当前整页缓存 $ttl 秒。 
  For Example: 
      eaccelerator_cache_page($_SERVER['PHP_SELF'].'?GET='.serialize($_GET),30); 
    echo time(); 
    phpinfo(); 
  ?> 

10. eaccelerator_rm_page($key) 
  删除由  eaccelerator_cache_page() 执行的缓存,参数也是 $key 

______________________________________________ 
(作个简单例子看看它的威力,注意在 cli 模式下可能无效!) 


/n";  }  function func() {    echo ', the world!';  }  function now($t) {    echo date('Y-m-d H:i:s', $t);  }}$tt = eaccelerator_get("test_tt");if (!$tt){  $tt = new test_cache;  eaccelerator_put("test_tt", $tt);  echo "no cached!
/n";}else {  echo "cached
/n";}echo $tt->pro; $tt->func();$tt->now(time() + 86400);?>

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