PHP bytecode caching and built-in server in detail

1). Starting from PHP5.0, there is a built-in bytecode caching function called Zend OPcache. Because PHP is an interpreted language, when the PHP interpreter executes a PHP script, it will parse the PHP script code, generate a series of Zend opcodes, and then execute the bytecode. This is the case for every HTTP request, which consumes a lot of resources and uses bytecodes. Section code caching can cache pre-compiled bytecode, reducing response time and reducing pressure on system resources.

Enable Zend OPcache

By default, Zend OPcache is not started. If you compile PHP yourself, the command must include the following options when executing:

--enable-opcache

After compiling PHP, you must also specify the extension path of Zend OPcache in the php.ini file, as follows:

zend_extension=/path/to/opcache.so

After PHP is compiled successfully, the file path of the Zend OPcache extension will be displayed immediately. You can use the following command to find the path of this PHP extension

php-config --extension-dir

Then use the following code to confirm that the extension is running normally

<?php
phpinfo();

Configure Zend OPcache

Recommended configuration

opcache.validate_timestamps = 1 //在生产环境中设为'0'
opcache.revalidate_freq = 0
opcache.memory_comsumption = 64
opcache.interned_strings_buffer = 16
opcache.max_accelerated_files = 4000
opcache.fast_shutdown = 1

You can visit the PHP official website to view detailed settings.

Use Zend OPcache

1). The production environment can set opcache.validate_timestamps=0. In the development environment, it needs to be set to 1

Built-in HTTP server

1). Start php -S localhost:4000 -c app/config/php.ini

2 ). .htaccess files are not supported. means controller mode is not supported. The front-end controller is used to forward all HTTP requests, which needs to be implemented through .htaccess files or rewrite rules.

3). You can use router scripts to achieve the above functions. However, only a small number of URL rewriting rules are supported php -S localhost:8000 router.php

4). Determine which server is used:

<?php
if (php_sapi_name() === 'cli-server') {
 //php内置服务器
} else {
 // 其他Web服务器
}

Special Series

PHP The directory address of the special series: github.com/xx19941215/…

The PHP special series is expected to be about twenty articles, mainly summarizing the basic knowledge that is easily overlooked in our daily PHP development and the standards, deployment, and Some practical suggestions for optimization, as well as in-depth research on the characteristics of the Javascript language.

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