Increasing the maximum post size

Question

There is a lot of data being submitted no file uploads and the $_SERVER[\'CONTENT_LENGTH\'] is being exceeded. Can this be increased?

Answer 1

I had a situation when variables went missing from POST and all of the above answers didn't help. It turned out that

max_input_vars=1000

was set by default and POST in question had more than that. This may be a problem.