If you want to increase the max execution time on your WordPress site, or change any associated php.ini variables but do not know where to find it, follow this quick guide:
The php.ini should be in the wp-admin directory, if it isn’t there, you can just create it and then define whats needed, by default it should contain.
upload_max_filesize = 64M post_max_size = 64M max_execution_time = 300
A “suped up” version could look something like this:
upload_max_filesize = 1000M post_max_size = 1100M max_execution_time = 600 memory_limit = 256M max_input_vars = 3000 file_uploads = on
Of course, check with your hosting provider first.