วิธีทำใส่รหัสให้ตรงรูปภาพเขาทำกันอย่างไงค่ะ ตามรูปเลยค่ะ

<?php
session_start();
header("Content-type:Image/png");
$im=@imagecreate(110,36) or die("Can't initial the GD image");
$bg_color=imagecolorallocate($im,230,230,230);
$text_color=imagecolorallocate($im,0,102,153);
$border_color=imagecolorallocate($im,100,100,100);
$grid_color=imagecolorallocate($im,180,180,180);

imageline($im,0,9,109,9,$grid_color);
imageline($im,0,18,109,18,$grid_color);
imageline($im,0,27,109,27,$grid_color);
imageline($im,27,0,27,36,$grid_color);
imageline($im,55,0,55,36,$grid_color);
imageline($im,82,0,82,36,$grid_color);
imageline($im,0,0,110,0,$border_color);
imageline($im,109,35,109,0,$border_color);
imageline($im,0,0,0,35,$border_color);
imageline($im,0,35,109,35,$border_color);


$randtime=time();
$randtime=$randtime%3;
if ($randtime==0) {$font="Enigma2i.TTF";}
if ($randtime==1) {$font="adler.ttf";}
if ($randtime==2) {$font="KingthingsTypewriter.ttf";}
//$font="KingthingsTypewriter.ttf";

imageTTFText($im,15,3,18,25,$text_color,$font,$_SESSION['code']);
//imageString($im,35,20,10,$password,$text_color);

imagepng($im);
imagedestroy($im);
?>