How To Change The Maximum File Size Upload?

how do you change the maximum upload file size, i want开发者_如何学JAVA people to only be aloud to upload 25mb video files on my site, can you do that?

like in a .htaccess File But Without Getting A 500 ERROR

UPDATE: http://www.triggervid.com/

when a user uploaded's a video i want it to say Something like - Sorry The file you are trying to upload is to big or it exceeds the maximum limit, only if it is over 25mb. sorry im not very Well At explaining things :)

P.S im using PHP mainly

In your php.ini file you can modify these lines as appropriate:

upload_max_filesize = 10M
post_max_size = 10M

you need to do changes in php,ini file .. by default for upload_max_filesize, it is 32Mb and for post_max_size it is 16Mb for Apache 2.0 but you an change as per your requirement

upload_max_filesize = desired file size.. (ie 5M) post_max_size = desired file size.. (ie 5M) )