How to use $_post function in php to receive data from form in html

I just started learning PHP. I searched a lot online but I can’t use the $_post function to print out the form data
This is the code
HTML part

     
 
 
 
fs
 
 
 
 
 
  
  PHP部分  按提交按钮后只能打印出php的代码

Reply content:

I just started learning PHP. I searched a lot online but I can’t use the $_post function to print out the form data
This is the code
HTML part

     
 
 
 
fs
 
 
 
 
 
  
  PHP部分  按提交按钮后只能打印出php的代码

• Make sure the formactionpath is correct

• php’sPOSTreceives a writing error. It needs to be capitalized$_POST['fs']. Your lowercase method will be parsed into a variable

$_POST

Capital letters.

PHP variables are case-sensitive. Methods, function names and constants are not distinguished (but they are still required to be consistent). They need to be capitalized as the friend above said, use $_POST[], and you said you can print out php Code, I think it shouldn’t be possible.