Discuss the detailed explanation of API development using eAccelerator in PHP

Discuss the detailed explanation of API development using eAccelerator in PHP_PHP Tutorial

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Release： 2016-07-21 15:07:34

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1. API and documentation description:
eAccelerator provides a convenient and stable native cache implementation. Since most of the code implementation is based on shared memory, it can only be implemented in *nix platform is used, and Windows platform Michael does not know when this support will be available.
eAccelerator provides the following API interfaces and files: (The following files are in the doc/php/ directory of the source code package)
File list:

Copy code The code is as follows:

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

Interface list:

Copy code The code is as follows:

 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)

Here are the interface descriptions translated by some netizens:

Copy the code The code is as follows:

eaccelerator_put($key, $value, $ttl=0)
 Save $value into the cache with $key as the key name (object type is supported under php4, but looking at the source code, it seems that it is not supported in zend2 ), $ttl is the life cycle of this cache, in seconds. Omitting this parameter or specifying it as 0 means there is no time limit until the server is restarted and cleared. 

eaccelerator_get($key)
 Returns the data stored in the corresponding eaccelerator_put() from the cache according to $key. If the cache has expired or does not exist, the return value is NULL

eaccelerator_rm($key)
 Remove cache according to $key

eaccelerator_gc()
 Remove and clean up all expired keys

eaccelerator_lock($key)
 as $key plus locking operation to ensure data synchronization during multi-process and multi-thread operations. You need to call eaccelerator_unlock($key) to release this lock or wait for the program request to automatically release this lock. 
 For example:
  eaccelerator_lock(“count”);
 eaccelerator_put(“count”,eaccelerator_get(“count”)+1));
 ?>

eaccelerator_unlock($key)
 Release the lock based on $key

eaccelerator_cache_output($key, $eval_code, $ttl=0)
 Cache the output of the $eval_code code for $ttl seconds, ($ttl parameter is the same as eacclerator_put) 
 For example: 
 

eaccelerator_cache_result ($key, $eval_code, $ttl=0)
 Cache the execution result of the $eval_code code for $ttl seconds, ($ttl parameter is the same as eacclerator_put), similar to cache_output
 For example: 
 

eaccelerator_cache_page($key, $ttl=0)
 Cache the current entire page for $ttl seconds. 
 For example: 
  eaccelerator_cache_page($_SERVER['PHP_SELF'].'?GET='.serialize($_GET),30);
 echo time();
 phpinfo();
 ?>

eaccelerator_rm_page($key)
 Delete the cache executed by eaccelerator_cache_page(), the parameter is also $key

2. Use eAccelerator to accelerate PHP code
In addition, support for eAccelerator has been integrated in PHPCMS. The following is a piece of code from PHPCMS

Copy code The code is as follows:

class cache
{
 function __construct()
 {
 }

 function cache()
 {
 $this->__construct();
 }

 function get($name)
 {
 return eaccelerator_get($name); 
 }

 function set($name, $value, $ttl = 0)
 {
 eaccelerator_lock($name);
 return eaccelerator_put($name, $value, $ ttl);
 }

 function rm($name)
 {
 return eaccelerator_rm($name);
 }

 function clear()
 {
 return eaccelerator_gc();
 }
}