There are reasons to use this routine. I can think of two:
- a busy website will have multiple web servers, and before one is brought online (via load balancer), the cache is built. This prevents problems of having too many cache misses in a short period on your entire code base, which could be massive, and cause problems.
- a website where the apc.stat flag is set to zero. That setting provides significant performance savings because no 'stat' needs to be performed on PHP code files. But they are not automatically rebuilt when changed. So what do you do when your code changes? Restart Apache, or manually clearing the APC cache with apc_clear_cache() - but both will clear the entire cache. There may be cases where it is much better to recompile select files instead. Some sites store data (that rarely changes) in PHP code to make good use of the opcode cache, updating that file and selectively compiling it would make writes efficient too.
PHP - Manual: apc_compile_file
2024-04-29
apc_compile_file
(PECL apc >= 3.0.13)
apc_compile_file — Stores a file in the bytecode cache, bypassing all filters
说明
Stores a file in the bytecode cache, bypassing all filters.
å‚æ•°
-
filename -
Full or relative path to a PHP file that will be compiled and stored in the bytecode cache.
返回值
æˆåŠŸæ—¶è¿”回 TRUE， 或者在失败时返回 FALSE。
å‚è§
- apc_bin_dumpfile() - Output a binary dump of cached files and user variables to a file
- apc_bin_loadfile() - Load a binary dump from a file into the APC file/user cache
add a note
User Contributed Notes 2 notes
Glen ¶
10 years ago
Andrea Giammarchi ¶
11 years ago
This is a simple way to cache a project entirely.
<?php // apc_compile_dir.php
function apc_compile_dir($root, $recursively = true){
$compiled = true;
switch($recursively){
case true:
foreach(glob($root.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR) as $dir)
$compiled = $compiled && apc_compile_dir($dir, $recursively);
case false:
foreach(glob($root.DIRECTORY_SEPARATOR.'*.php') as $file)
$compiled = $compiled && apc_compile_file($file);
break;
}
return $compiled;
}
?>
This is an example on how to use the function to compile your project.
<?php
echo '<pre>'.PHP_EOL;
if(function_exists('apc_compile_file')){
define('APC_CLEAR_CACHE', true);
define('APC_COMPILE_RECURSIVELY', true);
define('APC_COMPILE_DIR', '.');
require 'apc_compile_dir.php';
echo 'APC Directory Compiler '.gmdate('Y-m-d H:i:s').PHP_EOL;
echo PHP_EOL.'-------------------------'.PHP_EOL;
if(APC_CLEAR_CACHE){
echo (apc_clear_cache() ? 'Cache Cleaned' : 'Cache Not Cleaned').PHP_EOL;
var_dump(apc_cache_info());
echo PHP_EOL.'-------------------------'.PHP_EOL;
}
echo 'Runtime Errors'.PHP_EOL;
echo (apc_compile_dir(APC_COMPILE_DIR, APC_COMPILE_RECURSIVELY) ? 'Cache Created' : 'Cache Not Created').PHP_EOL;
echo PHP_EOL.'-------------------------'.PHP_EOL;
var_dump(apc_cache_info());
}
else
echo 'APC is not present, nothing to do.'.PHP_EOL;
echo '</pre>';
?>
官方地址：https://www.php.net/manual/en/function.apc-compile-file.php
IT
PHP
编程语言
Linux
科技
开发编程
Elasticsearch
HTML/CSS/XML
网络
JAVA
NoSQL
C/C++
面试
Golang
数据库
Git
算法
正则表达式
操作系统
Redis
互联网
MySql
JavaScript
运维
软件
架构设计
Mac OS
国际
TCP/IP
Excel
Vim
Windows
Socket
Oracle
VR
MongoDB
运营
Python
MemCache
商业
硬件
电子
设计
nginx
娱乐
摄影
游戏
WordPress
HTTP
团建
数码电器
广告
广告
php7 安装fileinfo扩展
preg_split — 通过一个正则表达式分隔字符串
[PHP] inet_pton/inet_ntop IP地址转换函数
php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题
PHPMailer设置utf8 PHPMailer字符集CharSet
如何在Composer中为GitLab实例设置访问令牌
array_multisort() 多字段排序
laravel框架查看sql语句方式
[原创]诡异的php-fpm超时问题
PHP获取指定函数定义在哪个文件中及行号
利用php soap实现web service
php设置cookie为httponly防止xss攻击
PHP-FPM进程数的设定
PHP5 扩展SOAP 调用 webservice
PHP7添加redis扩展
利用PHP SOAP实现WEB SERVICE
php上周一、本周一、下周一日期
PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗
纯php实现DES以及TripleDES加密算法
PHP - mysql_real_escape_string()与mysql_escape_string() 的区别