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Editorial Team
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Asked: 2026-06-07T09:53:33+00:00

I need the MongoDB PHP driver on my CentOS 5.4 machine. My PHP version

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I need the MongoDB PHP driver on my CentOS 5.4 machine. My PHP version is 5.1.6. I downloaded the RPM and installed it. That created several files in /usr/bin directory. I copied 

/usr/bin/mongo

to

/usr/lib/php/modules

which was what extension_dir showed on doing phpinfo();.

I also added 

extension=mongo.so

in /etc/php.ini.
However on executing my PHP script, i still get

Mongo class not found.

What’s going wrong here ?

Also, my phpinfo() shows PHP version 5.1.6 whereas running PHP from command line shows 5.3.3. Could anything be wrong with that ?

Thanks in advance.

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1 Answer

  1. Editorial Team

    You’re saying your webserver and command line PHP report different versions. These are going to be installed in different locations, and their extensions are API incompatible with each other.

    When you installed the php_mongo extension, it may have used the command line php to determine the directory to install the extension to.

    Make sure you have the correct php_mongo for the php version of your webserver, and it is in the correct extensions directory. (get the directory from the php.ini returned by phpinfo())

    I hope you realise PHP 5.1 is also many years out of date. Unless you have a specific reason to use a version that old, you should also look at upgrading to a more recent version.

    Edit:

    Just read your comment “I must also mention that /usr/bin/mongo is a binary executable file but its not having a .so extension. Im copying it as is to /usr/lib/php/modules”

    No no no! 🙂

    This is the mongo command line client. This is not the PHP extension!

    You can run a find /* -name "mongo.so" to see where the installer put the file, this will probably also give you an indication of which version of PHP it was installed for.

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