Evan：/* see also */

2020-02-18T08:13:42Z

see also

新页面

[[category:php]]

=我的环境 =
<pre>ubuntu 18.04 xampp 7.3.12
有密码的memcached服务相关信息
'192.168.10.214:11211'), 'memcached', 'RV3kEjX5Ug5ufTKO'</pre>

=ins sasl 库=
<pre>
apt-get install -y \
libevent-dev \
libsasl2-2 \
sasl2-bin \
libsasl2-2 \
libsasl2-dev \
wget \
pwgen \
gcc \
make \
libsasl2-modules</pre>

=ins libmemcached=
<pre>
wget -c https://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.18.tar.gz
tar xvf libmemcached-1.0.18.tar.gz
cd libmemcached-1.0.18/

./configure --prefix=/usr/local/libmemcached --enable-sasl

Ubuntu 18.04 LTS使用GCC 7.3版本，编译libmemcached失败。

clients/memflush.cc:42:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
if (opt_servers == false)
^~~~~
clients/memflush.cc:51:24: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
if (opt_servers == false)
^~~~~
</pre>

编译前需要打个补丁，参见：
https://bugs.launchpad.net/libmemcached/+bug/1663985
https://src.fedoraproject.org/cgit/rpms/libmemcached.git/plain/libmemcached-build.patch
<pre>

wget https://src.fedoraproject.org/rpms/libmemcached/raw/HEAD/f/libmemcached-build.patch

libmemcached-1.0.18# patch -p1 < libmemcached-build.patch

make -j3 && make install

</pre>

= ins php memcached =

<pre>

memcached PHP extension for interfacing with memcached via libmemcached library

wget -c https://pecl.php.net/get/memcached-3.1.5.tgz

apt install m4 autoconf

tar xvf memcached-3.1.5.tgz

cd /opt/memcached-3.1.5/
/opt/lampp/bin/phpize
./configure --with-libmemcached-dir=/usr/local/libmemcached --enable-memcached-sasl --with-php-config=/opt/lampp/bin/php-config

make -j3
make install
Installing shared extensions: /opt/lampp/lib/php/extensions/no-debug-non-zts-20180731/

vim /opt/lampp/etc/php.ini
; add

extension=memcached.so
memcached.use_sasl = 1

检验
/opt/lampp/bin/php -m | grep mem
memcached

或者直接 phpinfo
</pre>
=PHP 代码示例=
<pre>
示例1：基本的连接云数据库 Memcache 及 set/get 操作

<?php
$connect = new Memcached; //声明一个新的memcached链接
$connect->setOption(Memcached::OPT_COMPRESSION, false); //关闭压缩功能
$connect->setOption(Memcached::OPT_BINARY_PROTOCOL, true); //使用binary二进制协议
$connect->setOption(Memcached::OPT_TCP_NODELAY, true); //重要，php memcached有个bug，当get的值不存在，有固定40ms延迟，开启这个参数，可以避免这个bug
$connect->addServer('192.168.10.214', 11211); //添加memcached地址及端口号
$connect->setSaslAuthData('memcached', 'RV3kEjX5Ug5ufTKO'); //S帐号密码进行鉴权，如已开启免密码功能，则无需此步骤
$connect->set("hello", " hey evan world");
echo 'hello: ',$connect->get("hello");
$connect->quit();
?>

打开浏览器
hello: hey evan world
</pre>

=troubleshooting=
<pre>
装cyrus-sasl-devel软件包然后重新编译libmemcached。

重新libme 再安装一次吧
要先打包时一样安装 sasl之类的
configure: error: no, libmemcached built with sasl disabled. Run configure with --disable-memcached-sasl or update libmemcached with sasl support

php编译扩展库时报错：Cannot find autoconf. Please check your autoconf installation and the $PHP_AUTOCONF environment variable. Then, rerun this script.

yum -y install autoconf m4

configure: error: Cannot find php-config. Please use --with-php-config=PATH 错误的解决方案

一般出现这个错误说明你执行 ./configure 时 --with-php-config 这个参数配置路径错误导致的。

修改为：

./configure --with-php-config=/usr/local/php/bin/php-config

就可以解决问题

上面的 /usr/local/php/ 是你的 php 安装路径

</pre>

=see also=
[https://help.aliyun.com/document_detail/48432.html aliyun文档PHP: memcached]

https://www.php.net/manual/en/book.memcached.php

[https://blog.csdn.net/fwkjdaghappy1/article/details/7592337 php的两个memcached扩展：memcache和memcached]

[https://www.cnblogs.com/lxg0/articles/5343523.html Centos 7.2 及php7环境下升级memcache未果，改安装 memcached]

Php连接有密码的memcached服务 - 版本历史

Evan：​/* see also */

Evan：/* see also */