/tools/captcha/captchac_lib.php

<?php

// -------------------------------------------------------------------------------------

// Captcha Creator PHP Image Displaying Script.

// Copyright (c) 2007 Alexandru Marias. All rights reserved

// Web: http://www.captchacreator.com

// Phone: +40722486348

// ----------------------------------------------------------------



 session_start();



function RandomCode($min,$max) // Chose the turing code

{

// Choosing a random Security Code

Global $CSrc;  // CSrc contains the characters from which the Captcha Code will be generated



$srclen = strlen($CSrc)-1;



// Chose the length of the turing code

$length = mt_rand($min,$max); // Between 4 and 8 chars



$Code = '';



// Fill the turing string with characters and numbers from $src

for($i=0; $i<$length; $i++) 

	$Code .= substr($CSrc, mt_rand(0, $srclen), 1);



return $Code;



}



// -------------------------------------------------------------------------------------

function CheckCaptcha($Turing)

{ 



global $ImageCode;     



if ( session_id() == "" )

	{

	// We have no session id. There is no captcha code stored anywhere

	// Return false

	$ImageCode = 'wrong'; return 0;

	}



if ( !isset( $_SESSION['turing_string'] ) ) 

	{ 

	// We have a session id, but the Turing String is empty, it was not generated yet.

	// Return true

	$ImageCode = ''; return 1; 

	}

	else if ( strtoupper($_SESSION['turing_string']) == strtoupper($Turing) ) 

			{ 

			// Session id is ok, and Generated captcha is identical to user entered captcha

			// Return true

			$ImageCode = 'ok'; return 1; 

			}

		else { $ImageCode = 'wrong'; return 0; }

}

  





?>