php_oci8_12c.dll - not found

  Warning: PHP Startup: Unable to load dynamic library 
  'C:\xampp\php\ext\php_oci8_12c.dll' - %1 is not a valid Win32 application.
  in Unknown on line 0

Hello, I am trying to connect php laravel with my oracle database and when I run this command:

    composer create-project laravel/laravel laravel "5.4.*" 

I get the error above. My php.ini seems to be fine, I have this:

    extension=php_oci8_12c.dll  ; Use with Oracle Database 12c Instant Client

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