php5.3 installation libmemcached extension method and simple example_PHP tutorial

libmemcached is a memcached library, client library, client library implemented in C and C++ languages. It has low memory usage, thread safety, and provides comprehensive support for memcached functions. It also uses a variety of command line tools: memcat, memflush, memrm, memstat, and memslap (load generation). The library has been designed to allow different hashing methods for keys, split keys, and use unified hash distribution

The php memcache client based on libmemcached has many advantages

•hash consistent storage
•multi get/set
•Automatically hash the key to int, avoiding the limitation that the memcache key string is less than 255Byte by default
I haven’t configured a server for a long time. I always thought that libmemcached’s php memcached has been included in the basic installation package. In the end, I still need to compile it myself. There are many hidden pits in the entire installation process, and it took several attempts before I succeeded

Installation is divided into two steps

•Install libmemcached, targeting so and header files
•Install memcachedphp extensions
libmemcaced is divided into two major versions, 0.x and 1.x. The 1.x version started from 2011-09-28. Compilation is very troublesome and requires special configuration of gcc4.0 or above. Compile is extremely slow. The 0.x version is simple. There are many, the highest version is 0.53, so choose to install 0.53

The best products always appear in pairs. PHP’s memcahed also starts from 2.1.0, requiring libmemcached to be version 1.0.x

I use libmemcaced 0.53, and for php-memcahed I choose 2.0.0. Version maintenance of open source software is a mess

Install libmemcached

The code is as follows

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wget https://launchpad.net/libmemcached /1.0/0.53/+download/libmemcached-0.53.tar.gz

代码如下	复制代码
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

tar xvfz libmemcached-0.53.tar.gz

cd libmemcached-0.53
./configure --prefix=/opt/libmemcached Make && make install

代码如下	复制代码
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

Install php extension

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 to install memcached.so to ${php install dir}/extensions/no-debug-non-zts-20090626/. This directory varies with different PHP versions

The last step is to modify php.ini and add extension=memcached.so

We have already installed it and let’s take a look at a simple example

7 int main(int argc,char *argv[]) 8 {

The code is as follows

代码如下

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#include  2 #include  3 #include  4  5 using namespace std;  6  7 int main(int argc,char *argv[])  8 {  9     //connect server 10     memcached_st *memc; 11     memcached_return rc; 12     memcached_server_st *server; 13     time_t expiration; 14     uint32_t  flags; 15 16     memc = memcached_create(NULL); 17     server = memcached_server_list_append(NULL,"localhost",11211,&rc); 18     rc=memcached_server_push(memc,server); 19     memcached_server_list_free(server); 20 21     string key = "key"; 22     string value = "value"; 23     size_t value_length = value.length(); 24     size_t key_length = key.length(); 25 26 27     //Save data 28     rc=memcached_set(memc,key.c_str(),key.length(),value.c_str(),value.length(),expiration,flags); 29     if(rc==MEMCACHED_SUCCESS) 30     { 31         cout 32     } 33 34     //Get data 35     char* result = memcached_get(memc,key.c_str(),key_length,&value_length,&flags,&rc); 36     if(rc == MEMCACHED_SUCCESS) 37     { 38         cout 39     } 40 41     //Delete data 42     rc=memcached_delete(memc,key.c_str(),key_length,expiration); 43     if(rc==MEMCACHED_SUCCESS) 44     { 45         cout 46     } 47 48     //free 49     memcached_free(memc); 50     return 0; 51 } 52 53 编译：g++ -o testmemcached testmemcached.cpp -lmemcached 运行：./testmemcached 结果：Save data:value sucessful!       Get value:value sucessful!       Delete key:key sucessful!

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#include 2 #include

3 #include

4

5 using namespace std;

6

9 //connect server 10 memcached_st *memc; 11 memcached_return rc; 12 memcached_server_st *server; 13 time_t expiration; 14 uint32_t flags; 15 16 memc = memcached_create(NULL); 17 server = memcached_server_list_append(NULL,"localhost",11211,&rc); 18 rc=memcached_server_push(memc,server); 19 memcached_server_list_free(server); 20 21 string key = "key"; 22 string value = "value"; 23 size_t value_length = value.length(); 24 size_t key_length = key.length(); 25 26 27 //Save data 28 rc=memcached_set(memc,key.c_str(),key.length(),value.c_str(),value.length(),expiration,flags); 29 if(rc==MEMCACHED_SUCCESS) 30 { 31          cout 32 } 33 34 //Get data 35 char* result = memcached_get(memc,key.c_str(),key_length,&value_length,&flags,&rc); 36 if(rc == MEMCACHED_SUCCESS) 37 { 38           cout 39 } 40 41 //Delete data 42 rc=memcached_delete(memc,key.c_str(),key_length,expiration); 43 if(rc==MEMCACHED_SUCCESS) 44 { 45          cout 46 } 47 48 //free 49 memcached_free(memc); 50 return 0; 51} 52 53 Compile: g++ -o testmemcached testmemcached.cpp -lmemcached Run: ./testmemcached Result: Save data:value sucessful! Get value:value sucessful! Delete key:key sucessful! Notes It should be noted that libmemcached is not libmemcache. They are two different client libraries. The former is currently under active development, while the latter has not been updated for a long time. Memcached is a high-performance, distributed memory object caching system that reduces database access through memory data caching, thereby increasing the speed of dynamic content application websites. The official development and release of memcached is only the server-side program of the application. It releases the server-side connection reading and writing protocol. The client-side implementation depends on the dynamic scripts used by the dynamic content application website. There are many kinds. The specific list can be Check out the official website.

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