Install PHP extension Memcache in Linux

Install PHP extension Memcache in Linux

The work of memcache is to maintain a huge hash table in the memory of a dedicated machine to store frequently read and written arrays and files, thus greatly improving the website operation efficiency, reduces the read/write pressure on the backend database.

Lab environment: CentOS 6.6 x86_64
Build the LAMP environment: php version 5.6.8 and apache version 2.4.12
1. Install libevent support before installing memcached:
# Wget http://syslab.comsenz.com/downloads/linux/libevent-1.4.12-stable.tar.gz
# Tar zxvf libevent-1.4.12-stable.tar.gz
# Cd libevent-1.4.12-stable
#./Configure -- prefix =/usr/local/libevent
# Make & make install

2. Compile and install memcached on the server
# Wget http://syslab.comsenz.com/downloads/linux/memcached-1.4.5.tar.gz
# Tar zxvf memcached-1.4.5.tar.gz
# Cd memcached-1.4.5
#./Configure -- prefix =/usr/local/memcached -- with-libevent =/usr/local/libevent/
# Make & make install

3. Steps for installing memcache on the client:
# Wget http://www.lishiming.net/data/attachment/forum/memcache-2.2.3.tgz
# Tar zxvf memcache-2.2.3.tgz
# Cd memcache-2.2.3
#/Usr/local/php/bin/phpize
#./Configure -- with-php-config =/usr/local/php/bin/php-config -- enable-memcache
# Make

The following error is reported after make is executed:
/Usr/local/src/memcache-2.2.3/memcache. c: In the function 'php _ mmc_connect:
/Usr/local/src/memcache-2.2.3/memcache. c: 1902: Error: Too few arguments are provided to the function 'zend _ list_insert'
/Usr/local/src/memcache-2.2.3/memcache. c: 1919: Error: Too few arguments are provided to the function 'zend _ list_insert'
/Usr/local/src/memcache-2.2.3/memcache. c: In the function 'zif _ memcache_add_server:
/Usr/local/src/memcache-2.2.3/memcache. c: 1975: Error: Too few arguments are provided to the function 'zend _ is_callable'
/Usr/local/src/memcache-2.2.3/memcache. c: 2003: Error: Too few arguments are provided to the function 'zend _ list_insert'
/Usr/local/src/memcache-2.2.3/memcache. c: In the 'zif _ memcache_set_server_params 'function:
/Usr/local/src/memcache-2.2.3/memcache. c: 2059: Error: Too few arguments are provided to the function 'zend _ is_callable'
/Usr/local/src/memcache-2.2.3/memcache. c: In the function 'mmc _ find_persistent:
/Usr/local/src/memcache-2.2.3/memcache. c: 2159: Error: Too few arguments are provided to the function 'zend _ list_insert'
/Usr/local/src/memcache-2.2.3/memcache. c: 2177: Error: Too few arguments are provided to the function 'zend _ list_insert'
Make: *** [memcache. lo] Error 1

Modify according to the error:
Vi memcache. c
Put all: zend_list_insert (pool, le_memcache_pool );
Change to: zend_list_insert (pool, le_memcache_pool TSRMLS_CC );

Put all: zend_list_insert (mmc, le_pmemcache );

Changed to: zend_list_insert (mmc, le_pmemcache TSRMLS_CC );
ALL: if (! Zend_is_callable (failure_callback, 0, NULL ))
Changed to: if (! Zend_is_callable (failure_callback, 0, NULL, NULL ))

After the modification is complete, re-make the compilation;
# Make install
Installing shared extensions:/usr/local/php/lib/php/extensions/no-debug-zts-20131226/

The memcache. so module after installation is in the above path;
# Vi/usr/local/php/etc/php. ini
Add extension = "memcache. so" in the last line"
After saving and exiting, restart apache, use php-m to view the installed memcache module, or access phpinfo. php in a browser to view it;

Start memcached Server:
#/Usr/local/memcached/bin/memcached-d-u root-m 256-p 11211-l localhost
-D is to start a daemon process,
-M: Specifies the memory used by memecached. The unit is M.
-P specifies the memcached startup Port
-L specify the bound IP Address
-U indicates to start as an account
An error is reported after startup. The libevent module cannot be found;
/Usr/local/memcached/bin/memcached: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
The libevent-1.4.so.2 needs to be copied or linked to/usr/lib64 (x86_64-bit system, 32-bit/usr/lib directory), otherwise memcached cannot load normally.
# Cp/usr/local/libevent/lib/libevent-1.4.so.2/usr/lib64

Test the memcache environment and write a PHP file under the root directory of the website.
[Root @ localhost htdocs] # cat 1.php
<? Php
$ Mem = new Memcache;
$ Mem-> connect ("localhost", 11211 );
$ Mem-> set ('test', 'Hello world', 0, 60 );
Echo $ mem-> get ('test ');
?>

Use curl or webpage access IP Address/1. If php displays hello world, the configuration is successful.
# Curl-xlocalhost: 80 192.168.4.231/1.php
Hello world

Memcached installation and startup script

Performance problems of using Memcached in PHP

Install Memcached in Ubuntu and its command explanation

Install and apply Memcached

Use Nginx + Memcached's small image storage solution

Getting started with Memcached

For details about Memcached, click here
Memcached: click here

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