PHP加速器eAccelerator配置使用指南

#tar -zxvf ./eaccelerator-0.9.5-beta2.tar.bz2
#cd eaccelerator-0.9.5-beta2
#export PHP_PREFIX="/usr/local" （把PHP安装目录导入到环境变量，FreeBSD默认是/usr/local）
#$PHP_PREFIX/bin/phpize
#./configure --enable-eaccelerator=shared --with-php-config=$PHP_PREFIX/bin/php-config
#make
#make install

4、ini文件配置 安装完成，下面开始配置php.ini文件,eAccelerator提供了两种配置和调用方式，分别如下。 安装为 Zend extension 模式：

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

5、验证安装结果 通过浏览器访问您的phpinfo()页面或者运行 php -i 得到php配置信息，里面如果看到类似下面的信息就表示安装成功了。 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 我的机器上同时还安装了Zend Optimizer3.0.1，所以看到的信息如下： 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 如果你打开了eAccelerator的debug选项，可以从日志中看到类似下面的信息

      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：

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：

eaccelerator_cache_page($key, $ttl=0) 将当前整页缓存 $ttl 秒。 例如：

      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 测试下eAccelerator强大的威力：（该代码在 cli 模式下可能无效）

class test_cache {
  var $pro = 'hello';
  function test_cache() {
    echo "Object Created!\n";
  }
  function func() {
    echo ', the world!';
  }
  function now($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);
?>

另外，据说在著名的vBulletin 3.60Beta版里面已经集成了对eAccelerator的支持。 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 = '" . $this->dbobject->escape_string($title) ."'
");
if (!empty($dataitem['title']))
{
$data =& $dataitem['data'];
$this->build($dataitem['title'], $dataitem['data']);
}
}
$this->register($title, $data);
}
/**
* Updates the appropriate cache file
*
* @param string title of the datastore item
*
* @return void
*/
function build($title, $data)
{
if (!function_exists('eaccelerator_put'))
{
trigger_error("eAccelerator not installed", E_USER_ERROR);
}
eaccelerator_lock($title);
eaccelerator_put($title, $data);
eaccelerator_unlock($title);
}
}