Install-Multi-Php-Version.md

Install multiple php version for kafka (Debian)

If you want to install kafka for php, you can do pecl install rdkafka and set library in php.ini, but when you try to install multiple php version using kafka, only one version can work.

Such as:

PHP Startup: Unable to load dynamic library 'rdkafka.so' (tried: /usr/lib/php/20190902/rdkafka.so (/usr/lib/php/20190902/rdkafka.so: cannot open shared object file: No such file or directory), /

20190902 is php library folder of php7.4, and 2021/09/02 is php8.1

At the same time, you can see rdkafka.so is installed in another version of library folder, which in my case is /usr/lib/php/20210902/rdkafka.so

So what u can do is: set pecl for another version of php

sudo pecl config-set php_ini /etc/php/7.4/cli/php.ini
sudo pecl config-set ext_dir /usr/lib/php/20190902/
sudo pecl config-set bin_dir /usr/bin/
sudo pecl config-set php_bin /usr/bin/php7.4
sudo pecl config-set php_suffix 7.4
sudo pecl install -f rdkafka

Doesn’t really sure if switching php version is necessary, but here’s the command sudo update-alternatives --config php.

After installed, u can see rdkafka.so is installed in correct folder, but origin folder’s library is gone, which could removed by pecl when kafka is re-installed.

Don’t really know the correct way to do this, but here’s mine solution:

  1. Rename both rdkafa.so name to be {--anything--}.so in lib and php.ini.
  2. Execute commands above.
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