How to install memcache in CentOs and how to add memcache extension in php

1. Download the required source code package

1. Download libevent2.0.22
2. Download memcached1.4.24
3. Download the php extension memcache3.0.8.

II. Installation steps

First, download the three software packages downloaded to the/usr/local/src Directory (note: you can put them in another directory)
1. Install libevent
Cd/usr/local/src
Tar zxvf libevent-2.0.22-stable.tar.gz # extract package
Cd libevent-2.0.22-stable
./Configure -- prefix =/usr/local # Pre-compilation configuration, generate Makefile File, path can be changed by yourself
Make # compile
Make install # install

2. Install memcached
Cd/usr/local/src
Tar zxvf memcached-1.4.24.tar.gz # extract package
Cd memcached-1.4.24
./Configure-with-libevent =/usr/local # configure before compilation to generate the Makefile file. The path must be consistent with that in libevent.
Make # compile
Make install # install

(Note: If an error is reported during make compilation, the following figure is displayed :)

Solution:

1, cd/usr/local/memcached-1.4.24 into the memcached Directory
2. vi Makefile (edit the Makefile file, delete "-Werror" in the file, and save it .)
3. Save and install make install.
Test whether the installation is successful.

As shown in the following figure:
3. Install extension

1. cd/usr/local/src
2. tar zxvf memcache-3.0.8.tgz
3. Memcache-3.0.8
4./usr/local/php5/bin/phpize # run the phpize extension installer.
As shown in the following figure:
5../configure-enable-memcache-with-php-config =/usr/local/php5/bin/php-config-with-zlib-dir
6. make # compile
7. make install # install
As shown in the following figure:
3. Configure the php. Ini file
1. Check whether memcache. so exists.
Cd/usr/local/lib/php/extensions/no-debug-non-zts-20100525/
2. vi/usr/local/php5/etc/php. ini # Edit php. ini
Add the following code:
Extension = memcache. so
[Memcache]
Extension_dir = "/usr/local/lib/php/extensions/no-debug-non-zts-20100525 /"
Memcache. allow_failover = 1
Memcache. max_failover_attempts = 20
Memcache. chunk_size = 8192

4. Configure the memcached server
1. Start the memcached server
Memcached-d-m 10-u root-l 127.0.0.1-p 11211-c 256-P/usr/local/bin/memcached. pid

If an error message such as "memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory" is reported when memcached is started, the location of the libevent cannot be found for memcached.
As shown in the following figure:

Solution:
1. First, check where the libevent is and run: # whereis libevent
2. Then, check where memcached looks for it and execute # LD_DEBUG = libs memcached-v 2> & 1>/dev/null | less: yes/usr/lib/libevent-2.0.so.5, so, create soft chain
3, # ln-s/usr/local/lib/libevent-2.0.so.5/usr/lib/libevent-2.0.so.5
4. Disable memcached: pkill memcached
5. Restart: memcached-d-m 10-u root-l 127.0.0.1-p 11211-c 256-P/usr/local/bin/memcached. pid
6. Check the port to see if memcached is successfully started! # Netstat-ant
As shown in the following figure:

Indicates that startup is successful!
7. Check whether your memcache extension has been added successfully!
As shown in the following figure:
The extension is added successfully!
5. Test the memcache extension of php
Connect ("127.0.0.1", 11211 );
$ Mem-> set ('key', 'This is my memcache ceshi! ', 0, 60 );
$ Val = $ mem-> get ('key ');
Echo $ val;
?>