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Editorial Team
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Asked: 2026-05-20T10:46:50+00:00

I’m trying to use the informix pdo driver but I always get the following

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I’m trying to use the informix pdo driver but I always get the following error:
“could not find driver”

I’m using the Microsoft IIS with PHPManager and PHP version 5.3.5. The php_pdo_informix.dll is located in the correct folder and enabled in the php.ini

Are there any ideas where the problem lies?

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1 Answer

  1. Editorial Team

    I don’t use PHP nor pdo drivers, but you can use Process Monitor by SysInternals/Microsoft to see if php_pdo_informix.dll is loaded.

    Often Informix drivers do not load, because some environment variables are not set. Especially INFORMIX_DIR, CLIENT_LOCALE, DB_LOCALE, SERVER_LOCALE, DBLANG. Do you have Informix Client installed? Are you able to set up and test ODBC connection?

    You can also add directory with php_pdo_informix.dll to PATH.

    EDIT:

    I downloaded php_pdo_informix.dll and it seems that this file is broken. I tested it with my Python utility to check dll libraries: http://code.activestate.com/recipes/576522-searching-dll-and-exe-files-in-path/

    c:\download>which_dll.py php_pdo_informix.dll
2011-03-04 08:03:45        32833 [b]    c:\download\php_pdo_informix.dll
ver:5.2.5.5
    trying to load "php_pdo_informix.dll" ...
    Cannot load "php_pdo_informix.dll" !!!

    And MessageBox appeared (translation from Polish)

    ---------------------------
python.exe - Bad image file
---------------------------
Aplication or libarary DLL c:\download\php_pdo_informix.dll is not correct image of Windowns NT. Check it with install disc.
---------------------------
OK   
---------------------------

    SHA1 sum of library I downloaded:

    b38bc54839c7c4b82e2057763ef1c6584dcbbb1f *php_pdo_informix.dll
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