How can I customize the sender's name by sending a message in PHP please teach the teacher, how to solve

How can I customize the sender's name by sending a message in PHP please advise the teacher.
Please instruct the teacher to add code to customize the sender name.

For example

Require '. /mail_config.php ';
Require ' axphp_email.php ';
$title =$_post[' title ';
$content =$_post[' content ';
$senddoemain =$_post[' Senddoemain '];
$smtpserver = $axphp [' Server '];
$smtpserverport = $axphp [' Port '];
$smtpusermail = $axphp [' email '];


$smtpuser = $axphp [' Mailuser '];

$smtppass = $axphp [' Mailpass '];


$mailsubject = $title;
$mailbody = $content;
$mailtype = "HTML";
$SB = 0;
$sendarray =explode (",", $senddoemain);
$emailnum =count ($sendarray);
foreach ($sendarray as $emaildododo)
{
$smtpemailto = $emaildododo;
$SMTP = new SMTP ($smtpserver, $smtpserverport, True, $smtpuser, $smtppass);
$smtp->debug = false;
$smtp->sendmail ($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);
}
; Echo '
';? >

------Solution--------------------
Think about, with the fromemail must have from the head, you see this sendmail function, inside there is no set request header.
From the head to get into

PHP code

from: Sender Name "sender email address" 
 