After installation, directly execute the simplest get post program, or other simple programs such as JQ's AJAX, POST, GET, etc. to send data to the server

1: Any version of php apache: Problem: GET accepted To data is empty var_dump output is empty. Only POST can accept data normally

2: Any version of php nginx: Problem: Unable to send data, Request Headers directly prompts a warning Provisional headers are shown

Please provide solutions to the above two problems, thank you.