PHP加速 eAccelerator 配置和使用指南，报错

zend_extension="/usr/local/lib/php/20050922/eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.log_file = "/var/log/httpd/eaccelerator_log"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"

extension="eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.log_file = "/var/log/httpd/eaccelerator_log"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"

#mkdir /tmp/eaccelerator
#chmod 777 /tmp/eaccelerator

This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
    with eAccelerator v0.9.5-beta2, Copyright (c) 2004-2006 eAccelerator, by eAccelerator

This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
    with eAccelerator v0.9.5-beta2, Copyright (c) 2004-2006 eAccelerator, by eAccelerator
    with Zend Extension Manager v1.0.10, Copyright (c) 2003-2006, by Zend Technologies
    with Zend Optimizer v3.0.1, Copyright (c) 1998-2006, by Zend Technologies

#tail /var/log/httpd/eAccelerator_log
EACCELERATOR hit: "/var/www/toplee.com/blog/index.php"
EACCELERATOR hit: "/var/www/toplee.com/blog/wp-blog-header.php"
EACCELERATOR hit: "/var/www/toplee.com/blog/wp-config.php"
EACCELERATOR hit: "/var/www/toplee.com/blog/wp-settings.php"
EACCELERATOR hit: "/var/www/toplee.com/blog/wp-content/plugins/wp-cache/wp-cache-phase1.php"
...

cache.php
dasm.php
encoder.php
info.php
loader.php
session.php
shared_memory.php

array eaccelerator_cached_scripts ()
void eaccelerator_cache_output (string $key, string $eval_code, [int $ttl = 0])
void eaccelerator_cache_page (string $key, [int $ttl = 0])
void eaccelerator_cache_result (string $key, string $code, [int $ttl = 0])
void eaccelerator_caching (boolean $flag)
void eaccelerator_clean ()
void eaccelerator_clear ()
array eaccelerator_dasm_file (mixed $filename)
mixed eaccelerator_encode (mixed $src, [mixed $prefix = ''], [string $pre_content = ''], [string $post_content = '']) 
void eaccelerator_gc ()
mixed eaccelerator_get (string $key) 
array eaccelerator_info ()
array eaccelerator_list_keys ()
void eaccelerator_load ()
boolean eaccelerator_lock (string $key)
void eaccelerator_optimizer (boolean $flag) 
void eaccelerator_purge ()
boolean eaccelerator_put (string $key, mixed $value, [int $ttl = 0])
array eaccelerator_removed_scripts ()
boolean eaccelerator_rm (string $key)
void eaccelerator_rm_page (string $key) 
boolean eaccelerator_set_session_handlers ()
boolean eaccelerator_unlock (string $key)

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。
 
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
 
eaccelerator_rm($key)
  根据 $key 移除缓存
 
eaccelerator_gc()
  移除清理所有已过期的 key
 
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:
  <?php
     eaccelerator_lock ( " count " ) ;
     eaccelerator_put ( " count " , eaccelerator_get ( " count " ) + 1 ) );
  ?>
 
eaccelerator_unlock($key)
  根据 $key 释放锁
 
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）
  例如：
  <?php eaccelerator_cache_output ( ' test ' , ' echo time(); phpinfo(); ' , 30 ) ; ?>
 
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
  例如：
  <?php eaccelerator_cache_result ( ' test ' , ' time() . "Hello"; ' , 30 ) ; ?>
 
eaccelerator_cache_page($key, $ttl=0)
  将当前整页缓存 $ttl 秒。
  例如：
  <?php
     eaccelerator_cache_page ( $_SERVER [ ' PHP_SELF ' ] . ' ?GET= ' . serialize ( $_GET ) , 30 ) ;
     echo time () ;
     phpinfo () ;
  ?>
 
eaccelerator_rm_page($key)
  删除由  eaccelerator_cache_page() 执行的缓存，参数也是 $key

2、PHP代码中使用eAccelerator加速

下面有一个测试的代码，你可以测试一下eAccelerator强大的威力：（该代码在 cli 模式下可能无效）

另外，据说在著名的vBulletin 3.60Beta版里面已经集成了对eAccelerator的支持，下面是一段来自vBulletin里面的代码

// #############################################################################
// eAccelerator
 
/**
* Class for fetching and initializing the vBulletin datastore from eAccelerator
*
* @package    vBulletin
* @version     $Revision: 0.1 $
* @date         $Date: 2005/06/12 13:14:18 $
*/
class vB_Datastore_eAccelerator extends vB_Datastore
{
     /**
    * Fetches the contents of the datastore from eAccelerator
    *
    * @param    array    Array of items to fetch from the datastore
    *
    * @return    void
    */
     function fetch ( $itemarray )
     {
         if ( ! function_exists ( ' eaccelerator_get ' ))
         {
             trigger_error ( " eAccelerator not installed " , E_USER_ERROR ) ;
         }
 
         foreach ( $this -> defaultitems AS $item )
         {
             $this -> do_fetch ( $item ) ;
         }
 
         if ( is_array ( $itemarray ))
         {
             foreach ( $itemarray AS $item )
             {
                 $this -> do_fetch ( $item ) ;
             }
         }
 
         $this -> check_options () ;
 
         // set the version number variable
         $this -> registry -> versionnumber =& $this -> registry -> options [ ' templateversion ' ] ;
     }
 
     /**
    * Fetches the data from shared memory and detects errors
    *
    * @param    string    title of the datastore item
    *
    * @return    void
    */
     function do_fetch ( $title )
     {
         $data = eaccelerator_get ( $title ) ;
         if ( $data === null )
         { // appears its not there, lets grab the data, lock the shared memory and put it in
             $data = '' ;
             $dataitem = $this -> dbobject -> query_first ( "
                SELECT title, data FROM " . TABLE_PREFIX . " datastore
                WHERE title = ' " . $this -> dbobject -> escape_string (