wget http://pecl.php.net/get/igbinary-2.0.8.tgz

tar -xzvf igbinary-2.0.8.tgz

 cd igbinary-2.0.8

/usr/local/php7./bin/phpize
 ./configure --prefix=/usr/local/igbinary-2.0.8 --with-php-config=/usr/local/php7./bin/php-config 
make 
make install 
php.ini加载 extension=igbinary.so

wget https://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.18.tar.gz

tar zxvf libmemcached-1.0..tar.gz

cd libmemcached-1.0.

./configure --prefix=/usr/local/libmemcached --with-memcached

make

make install

wget http://pecl.php.net/get/memcached-3.0.4.tgz

tar -zxvf memcached-3.0..tgz

cd memcached-3.0.

/usr/local/php7./bin/phpize 

./configure --with-php-config=/usr/local/php7./bin/php-config --enable-memcached --enable-memcached-json --enable-memcached-igbinary --with-libmemcached-dir=/usr/local/libmemcached

make

make install

php.ini加载  extension=memcached.so

重启php 查看phpinfo()是否已经正常加载memcached