查看“Php连接有密码的memcached服务”的源代码

php连接有密码的 memcached服务

=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
</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