Description:
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I think the problem is linked to Apache 2.0 but I am not really sure : could be the version of PHP (4.2.2) (but I cannot upgrade : it not my machine...)
Everythink works as expected on Apache 1.3 with PHP 4.3.2.

The problem : when trying to modify local setting of upload_max_filesize (in local .htaccess), phpinfo() shows the modification as expected, but file uploads don't work anymore (even with very small files of one byte). The function is_uploaded_file ($file) returns false in my scripts. Even when I use locally the same value as in the main php.ini, file uploads fail...
If I delete the line from the .htaccess, then everything works fine.

I also tried to modify locally other PHP settings to see if the problem was linked to modification of ANY local setting, but file uploads were not affected.

I know I should try to run PHP 4.2.2 on my Apache 1.3, to see if things work differently, but I thought I would ask first.

Thanks for anyone digging into this problem

Expected result:
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$HTTP_POST_FILES['import_file']['tmp_name'] should not be empty

Actual result:
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$HTTP_POST_FILES['import_file']['tmp_name'] is empty when local setting of upload_max_filesize is used