What is the best hosting that i can upload some php files and execute it using Ajax.
Except 000webhost because the most hours of day is down.
try freehosting however if you planning on having lots of calls and some memory take a premium plan from a company that you like.... i personally prefer fastcomet its premium and is going to cost some $$. The best hosting is the one you can afford and serves your needs though.
any hosting allows you to upload php files and execute ajax... is a matter of permissions on your files and php files etc.