在項目開發中，想要實現PHP多個進程之間共享數據的功能，讓客戶端連接能夠共享一個狀態，需要開啟共享內存函數shmop。如果預期考慮會遇到這方面需求，那麽最好在編譯PHP的時候添加--with-shmop選項。但是編譯的時候沒有添加，只能在重新編譯配置了。

一、找到php源碼包裏的擴展目錄，進入shmop

# cd /usr/local/src/php-7.1.10/ext/shmop/

二、執行phpize，生成配置

# phpize

[root@bogon shmop]# ls
acinclude.m4    build         config.h.in  config.nice    configure     CREDITS     libtool    Makefile.fragments  missing        package2.xml  README         shmop.la
aclocal.m4      config.guess  config.log   config.status  configure.
 
in  include     ltmain.sh  Makefile.global     mkinstalldirs  package.xml   run-tests.php  shmop.lo
autom4te.cache  config.h      config.m4    config.sub     config.w32    install-sh  Makefile   Makefile.objects    modules        php_shmop.h   shmop.c        tests

三、執行命令開始編譯

# ./configure --with-php-config=/usr/local/php/bin/php-config
# make 
 
&& make install

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------

Build complete.
Don‘t forget to run ‘make test‘.

Installing shared extensions:     
 
/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/

四、修改php.ini開啟擴展

復制返回的那行路徑：/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/

# vim /usr/local/php/etc/php.ini

;extension=php_pdo_sqlite.dll
;extension=php_pgsql.dll
extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20160303/shmop.so   //添加此行代碼，後面跟上shmop.so

重啟php

給PHP開啟shmop擴展實現共享內存