Block Bots/Robots From Registering on Your Website. Using This Simple Captcha Codes.

I know nobody would be happy seeing Bots flooding your site with spam post. Its very annoying. I've come up with some steps that'll help u stop them[bots].



You're free to ask any Question below..



Here We Go...

Copy The Below File And Save as captcha.php In Ur Public_html

Code:

session_start(); 



create_image(); 



exit(); 



function create_image() 



{ 



    $md5_hash = md5(rand(0,999)); 



    $security_code = substr($md5_hash, 15, 5); 



    $_SESSION["security_code"] = $security_code; 



    $width = 100; 



    $height = 30; 



    $image = ImageCreate($width, $height); 



    $white = ImageColorAllocate($image, 255, 255, 255); 



    $black = ImageColorAllocate($image, 0, 0, 0); 



    ImageFill($image, 0, 0, $white); 



    ImageString($image, 5, 30, 6, $security_code, $black); 



    header("Content-Type: image/jpeg"); 



    ImageJpeg($image); 



    ImageDestroy($image); 



} 



?>

now edit ur reg.php or registration.php or the file dat validate and execute ur reg form and look 4 this line of code



if(isset($_POST["submit"])){


immediately after it add dis


$code=$_POST["code"];



nw l
ook for The If or elseif statement that Check for the Inputed Value.

Add this Inclusive

Code:

if(!isset($_POST["code"])||$_POST["code"]==""||$_SESSION["security_code"]!=$_POST["code"])



{







//Your Error Message here.



}

Now Goto The Form field Area add dis Inclusive

Code:

Verification Code

Alternative Two



Save the Below Codes as img.php

Code:

session_start();



$code=rand(1000,9999);



$_SESSION["security_code"]=$code;



$im = imagecreatetruecolor(50, 24);



$bg = imagecolorallocate($im, 22, 86, 165);



$fg = imagecolorallocate($im, 255, 255, 255);



imagefill($im, 0, 0, $bg);



imagestring($im, 5, 5, 5,  $code, $fg);



header("Cache-Control: no-cache, must-revalidate");



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



imagepng($im);



imagedestroy($im);



?>

follow Same Step Above to Integrate it at ur reg form



I.e

Enter Image Text








And Validate it like this,if U wish
if($_SESSION['security_code'] != $_POST['code']){

//error Message Here

}



Alternative Three



Save the Below Codes as image.php

Code:

header("Content-type: image/png");



$string = "abcdefghijklmnopqrstuvwxyz0123456789";



for($i=0;$i<6;$i++){



    $pos = rand(0,36);



    $str .= $string{$pos};



}







$img_handle = ImageCreate (60, 20) or die ("Cannot Create image");







//Image size (x,y)



$back_color = ImageColorAllocate($img_handle, 255, 255, 255);



//Background color RBG



$txt_color = ImageColorAllocate($img_handle, 0, 0, 0);



//Text Color RBG



ImageString($img_handle, 31, 5, 0, $str, $txt_color);



Imagepng($img_handle);







session_start();



$_SESSION['security_code'] = $str;



?>

follow The Above Methods

to integrate it also.

I.e.










and Validate it lyk dis if u wish



if(!isset($_POST["code"])||$_POST["code"]==""||$_SESSION["security_code"]!=$_POST["code"])

{



//Do you Error Mesage here

}




You're free to ask Questions