Does the client socket send an HTTP POST request to trigger the isset of the server PHP page? Solution Ideas

Does the client socket send an HTTP POST request to trigger the isset of the server PHP page?
I use the socket on the client to send the HTTP POST request

post/send.php http/1.1
Host:www.temp.com
user-agent:mozilla/5.0 (Windows; U Windows NT 5.1; En-us; rv:1.7.6)
gecko/20050225 firefox/1.0.1
content-type:application/x-www-form-urlencoded
Content-length:6
Connection:keep-alive

Testname=a


The www.temp.com/send.php page is as follows



if (Isset ($_post[' submit ')) {
if ($_post[' testname ']== ' a ') {
Judgment processing
}
}
?>

My question is: After the client sends the HTTP request header, the PHP page will execute isset ($_post[' submit ') and judge the contents of the testname?

------Solution--------------------
No!
Because you didn't send the submit this variable
------Solution--------------------

PHP Code

  
  Look at Log.txt, you know.
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