Pecl install mongo – keeps compiling with wrong module API

mongodbpeclphp-fpmphp5

Working with Ubuntu 12.04 here, nginx and php5-fpm

I had mongo working well on php 5.3, then I added the ondrej/php5 ppa and updated to php5.4. It kept GD and CURL extensions, but not mongo. I re-added the line to the php.ini file, and nothing. Then I enabled startup errors and got this:

PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/mongo.so' - /usr/lib/php5/20100525/mongo.so: cannot open shared object file: No such file or directory

So, wild guess, I did find -name 'mongo.so' and moved the file from 20090626/ to 20100525/ …which resulted in this error: 

PHP Startup: mongo: Unable to initialize module
Module compiled with module API=20090626
PHP    compiled with module API=20100525
These options need to match

I then did pecl uninstall mongo and pecl install mongo – which created the new mongo.so file right back in 20090626/

I'm kinda new to all this so hopefully this is a blind easy mistake to fix! I just need to get mongo back up and running.

Best Answer

My guess would be either:

  • pecl install mongo is actually installing a pre-built binary (which would be really dumb, but wouldn't be nearly as surprising); or
  • You've still got the old php5-dev package from your 5.3 installation sitting around, and pecl is finding and using that instead of the 5.4 version. Take a look at your PHP-related packages list (dpkg -l '*php*') and see if there's any 5.3 packages left, and upgrade them.
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