http://php-accelerator.co.uk/ 可以下载,是zend的强劲对手。是免费的。我已经在用啦。效果还不错。
修改 PHP.ini 加上:
zend_extension = /usr/local/lib/php_accelerator_1.3.3r2.so
phpa = on
phpa.tweaks = on
phpa.cache_dir = /tmp
phpa.file_perms = 400
phpa.cache_file_prune_period = 1h
phpa.cache_file_ttl = 1d
phpa.shm_size = 10
phpa.shm_key = 0xc0deb00
phpa.shm_perms = 666
phpa.shm_user = nobody
phpa.shm_group = nobody
phpa.shm_release_at_exit = on
phpa.shm_stats_check_period = 5m
phpa.shm_ttl = 12h
phpa.shm_max_processes = 512
phpa.shm_lock_threshold0 = 10
apachectl graceful 就能用啦。具体参数看它的文档。
我们在 “LAMP 加速” 这篇文章中阐述过加速的几种办法,其中提到了 PHP Accelerator,它的安装方法十分简单,但是需要去他的网站获取一个激活键。
一、下载:
www.php-accelerator.co.uk/download.php
二、获取激活键并安装:
www.php-accelerator.co.uk/activate.php
注册自己的 SERVER_NAME 后,你会得到下面的提示:
Your key for www.freelamp.com is 8edfd13946c96309244fcca309415902
Now you must set the key for www.freelamp.com in your site configuration.
For single domains not using virtual hosts
The key can be set in the php.ini file as follows:
# PHPA key for www.freelamp.com
#
phpa.registration_key = 8edfd13946c96309244fcca309415902
For domains setup as a virtual host
Add the key to the domain specific section for your web server.
# www.freelamp.com VHost entry
#
ServerName www.freelamp.com
# ... (other vhost specific config)
# php settings
php_value phpa.registration_key 8edfd13946c96309244fcca309415902
# also enable phpa if set to off in the php.ini (the default is on)
php_value phpa 1
具体的 phpa 值的设置,可以参考软件随带的 CONFIGURATION 文件的配置。
由于大多数网站是虚拟主机配置,所以,建议采用 php_value phpa. 的方式设置。
例如:
php_value phpa.tweaks off
php_value phpa.cache_dir /tmp
php_value phpa.file_perms 400
php_value phpa.ignore_files "/index.php, /a/test.php"
# php_value phpa.ignore_dirs "/data/WWW/site1/,/cache/"
php_value phpa.shm_size 8
php_value phpa.shm_key 0xc0deb00
php_value phpa.shm_perms 664
三、设置 php.ini
假设我们把下载后的文件解开到 /usr/local/php ,那么在 php.ini 中加入:
zend_extension=/usr/local/php/php_accelerator_1.2p2.so
并注释掉原来的 Zend 优化引擎:
# zend_extension=/usr/local/Zend/lib/ZendOptimizer.so
重新启动 Apache ,用浏览器浏览一个任意 PHP 页面可以看到 /tmp 下面生成了一些 phpa 开头的文件。另外一个检查缓冲是否起作用的办法是看 phpinfo() 的输出,原来的 Zend 优化引擎的说明部分,已经被显示成:
This program makes use of the Zend Scripting Language Engine:
Zend Engine v1.1.1, Copyright (c) 1998-2001 Zend Technologies
with the PHP Accelerator v1.2p2, Copyright (c) 2001-2002, by Nick Lindridge
需要说明的是,安装 INSTALL 安装说明上的办法,其中的 .so 文件和真实的 .so 文件有差异,所以,你在安装的时候需要注意到这个区别。
四、调整缓冲大小
PHP Accelerator 提供了缓冲管理命令:
phpa_cache_admin -mv 观察内存的缓冲情况
phpa_cache_admin -fv 观察文件的缓冲情况
phpa_cache_admin -k 设置缓冲大小
五、总结
该软件提供的 INSTALL 文件阐述了关于性能上的一些说法,笔者不在这里赘述。
需要说明的是,FreeLAMP.com 的文章目前不是 PHP 架构的,但是论坛系统是 PHP 架构的,所以性能上的提升只会是论坛系统的提升

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


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