pecl

apt-get install php-pecl

2.相關擴展

apt-get install libmcrypt-dev libreadline-dev

3.mcrypt

pecl install mcrypt-1.0.1

執行完會看到以下信息。

...

Build process completed successfully

Installing ‘/usr/lib/php/20170718/mcrypt.so‘ ----> this is our path to mcrypt extension lib

install ok: channel://pecl.php.net/mcrypt-1.0.1

configuration option "php_ini" is not set to php.ini location

You should add "extension=mcrypt.so" to php.ini

4.mcrypt.so擴展名添加到php.ini中

在ln -s軟連接到cli和 (fpm or apache2 )

/etc/php/7.2/mods-available (php.ini)

/etc/php/7.2/cli/conf.d/ (cli)

/etc/php/7.2/fpm/conf.d/ (fpm)

/etc/php/7.2/apache2/conf.d/ (apache2)

5.重啟php-fpm，再次查看已經安裝成功

php -i | grep mcrypt

php -m | grep mcrypt

原文：http://blog.51cto.com/jinchen/2141477

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