"An error occurred while processing this directive"

I cannot upload large files. I've set php.ini as such:

max_execution_time = 3600
max_input_time = 600
memory_limit = 100M
post_max_size = 100M
file_uploads = On
upload_max_filesize = 100M 

It returns a 500 error: an error occurred while processing th开发者_Python百科is directive

Why is this? And more importantly, how can I fix it?

500 error is not an error itself, it's just a banner that reads "There is an error somewhere! See error log for the details".

Looks like it's not a php problem, but a web-server one. But I hate to guess anyway. Better to take a look into error log.

It could be SSI problem. Maybe your webserver is having a problem to read some scripts which have SSI commands in it. Try to take a look at the configuration. If you use Apache, try to check the AddHandler setting. Hope this helps.

If you are on a shared server, I imagine the admins are overriding your ini settings. Use http://php.net/manual/en/function.phpinfo.php to confirm your settings are actually taking effect.