Php method for handling multiple submit submission forms

How to process multiple submit submission forms in php (differentiate different forms) test. php

The code is as follows:

$ Test = $ _ POST ['test'];
Echo '12 ';
Echo $ test;
Echo $ _ POST ['submit1'];
Echo $ _ POST ['submit2'];
If (isset ($ _ POST ['submit1']) & $ _ POST ['submit1'] = 'submit1 ')
{
Echo 'ok1 ';

}
If (isset ($ _ POST ['submit2']) & $ _ POST ['submit2'] = 'submit2 ')
{
// Echo" ";
// Header ("Location: index. php ");
// Break;
Echo 'ok2 ';
}
?>

The code is as follows:

Why does the test page not pass data for the first time after loading?
Echo $ _ POST ['submit1']; echo $ _ POST ['submit2']; print empty
After that, it will be fine. Is there a way to solve this problem?
Method 2: