Program PHP Captcha

BERIKUT PTOGRAM TANTANGAN PHP DI SEKOLAH KU DAN INI CARA-CARA NYA

<?php

//captcha basic

session_start();

//membuat kata acak

$alphaNumeric = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

$random = substr(str_shuffle($alphaNumeric), 0,1);

$random1 = substr(str_shuffle($alphaNumeric), 0,1);

$random2 = substr(str_shuffle($alphaNumeric), 0,1);

$random3 = substr(str_shuffle($alphaNumeric), 0,1);

$random4 = substr(str_shuffle($alphaNumeric), 0,1);

$random5 = substr(str_shuffle($alphaNumeric), 0,1);

//membuat gambar dg background biru

$image = imagecreate (100, 40);

$backcolor = imagecolorallocate($image, 200, 200, 255);

$textColor = imagecolorallocate ($image, 255, 25, 25);

$textColor1 = imagecolorallocate ($image, 255, 255, 0);

$textColor2 = imagecolorallocate ($image, 233, 10, 150);

$textColor3 = imagecolorallocate ($image, 20, 200, 140);

$textColor4 = imagecolorallocate ($image, 155, 105, 250);

$textColor5 = imagecolorallocate ($image, 170, 0, 255);

imagestring ($image, 5, 20, 8, $random, $textColor);

imagestring ($image, 5, 30, 8, $random1, $textColor1);

imagestring ($image, 5, 40, 8, $random2, $textColor2);

imagestring ($image, 5, 50, 8, $random3, $textColor3);

imagestring ($image, 5, 60, 8, $random4, $textColor4);

imagestring ($image, 5, 70, 8, $random5, $textColor5);

//memberi nilai sesi

$_SESSION['image_random_value'] = md5($random);

$_SESSION['image_random_value'] = md5($random1);

$_SESSION['image_random_value'] = md5($random2);

$_SESSION['image_random_value'] = md5($random3);

$_SESSION['image_random_value'] = md5($random4);

$_SESSION['image_random_value'] = md5($random5);

header('Content-type: image/jpeg');

imagejpeg($image);

imagedestroy($image);

?>

JIKA ADA KESULITAN ATAU KESALAHAN, JANGAN SEGAN-SEGAN UNTUK BERTANYA