php5.3 installation libmemcached extension method and simple example

Libmemcached-based PHP memcache client has many advantages

Hash Consistent storage
Multi Get/set
• Automatically the key hash is int, avoiding the Memcache key string default less than 255Byte limit
For a long time did not configure the server, always thought that libmemcached PHP memcached has been included in the basic installation package, in the end also need to compile their own. The whole installation process a lot of dark pits, tried several times before succeeding

Installation in two steps

• Install libmemcached, target so and header files
• Install memcachedphp extensions
Libmemcaced is divided into two major versions 0.x and 1.x, 1.x version from 2011-09-28 onwards, compiling very troublesome, need gcc4.0 above the specialized configuration, compile extremely slow. 0.x version is much simpler, the highest version is 0.53, so choose Install 0.53

Acura always appear in pairs, PHP memcahed also starting from 2.1.0, request libmemcached must be 1.0.x version

libmemcaced I use 0.53, that php-memcahed choose 2.0.0. Open source software version maintenance is a lousy account.

Install libmemcached

The code is as follows	Copy Code
wget https://launchpad.net/libmemcached/1.0/0.53/+download/libmemcached-0.53.tar.gz Tar Xvfz libmemcached-0.53.tar.gz CD libmemcached-0.53 ./configure--prefix=/opt/libmemcached Make && make install

Installing PHP extensions

The code is as follows	Copy Code
wget http://pecl.php.net/get/memcached-2.0.0.tgz Tar zvxf memcached-2.0.0.tgz CD memcached-2.0.0/ ./configure--enable-memcached--with-php-config=/usr/local/php/bin/php-config--with-libmemcached-dir=/opt/ libmemcached/ Make && make install

Make install is memcached.so installed to ${php install dir}/extensions/no-debug-non-zts-20090626/, which varies with PHP versions

The final step, modify PHP.ini, plus extension=memcached.so

With the face we have installed to see the simple example

The code is as follows

Copy Code

#include <iostream> 2 #include <string> 3 #include <libmemcached/memcached.h> 4 5 using namespace Std; 6 7 int main (int argc,char *argv[]) 8 { 9//connect Server Ten Memcached_st *MEMC; One Memcached_return RC; Memcached_server_st *server; time_t expiration; uint32_t flags; 15 MEMC = Memcached_create (NULL); Server = Memcached_server_list_append (NULL, "localhost", 11211,&AMP;RC); Rc=memcached_server_push (Memc,server); Memcached_server_list_free (server); 20 string key = "Key"; String value = "Value"; size_t value_length = Value.length (); size_t key_length = Key.length (); 25 26 //save data Rc=memcached_set (Memc,key.c_str (), Key.length (), Value.c_str (), Value.length (), expiration,flags); if (rc==memcached_success) 30 { cout<< "Save data:" <<value<< "sucessful!" <<endl; 32} 33 //get data char* result = Memcached_get (Memc,key.c_str (), KEY_LENGTH,&AMP;VALUE_LENGTH,&AMP;FLAGS,&AMP;RC); if (rc = = memcached_success) 37 { cout<< "Get Value:" <<result<< "sucessful!" <<endl; 39} 40 //delete data Rc=memcached_delete (Memc,key.c_str (), key_length,expiration); if (rc==memcached_success) 44 { cout<< "Delete key:" <<key<< "sucessful!" <<endl; 46} 47 //free Memcached_free (MEMC); 0 return; 51} 52 53 Compiling: g++-o testmemcached testmemcached.cpp-lmemcached Run:./testmemcached Result: Save data:value sucessful! Get Value:value sucessful! Delete Key:key sucessful!

Attention Matters

It is important to note that libmemcached is not libmemcache, they are two different client libraries, the former is currently active and the latter has not been updated for a long time.

Memcached is a high-performance, distributed memory object caching system, which can reduce the access to the database through the memory data cache, so as to improve the speed of the dynamic Content application website. Memcached official development released, just the application of the server-side program, it released the server-side connection read-write protocol, the implementation of the client, according to the dynamic content of the application site to use the different dynamic scripts, and a variety of specific lists, can view the official website.