Captcha wird nicht mehr Angezeigt

<?php

error_reporting(0);

if($_GET[ci]=="1") {

$tmp_dir_path= '../data/__TEMP__/';

$captcha_expires_after = 420;

header("Expires: Mon, 01 Jul 1990 00:00:00 GMT");

header("Last-Modified: " . gmdate("D, d M Y H:i:s") ." GMT");

header("Pragma: no-cache");

header("Cache-Control: no-store, no-cache, max-age=0, must-revalidate");

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

if (!empty( $_GET['img'] ) )

$img = $_GET['img'];

else {

echo 'Kein Bild übergeben via &img=...';

exit;

}

if (!$fh = fopen( $tmp_dir_path.'cap_'.$img.'.jpg', 'rb')) { echo 'Kann Bilddatei nicht öffnen.'; }

else { fpassthru( $fh ); fclose( $fh ); }

$tmp_dir = dir( $tmp_dir_path );

while( $entry = $tmp_dir->read()) {

if ( is_file( $tmp_dir_path . $entry ) ){

if ( mktime() - filemtime( $tmp_dir_path . $entry ) > $captcha_expires_after ) {

unlink( $tmp_dir_path . $entry );

}}}

}

else {

class captcha {

var $session_key = null;

var $temp_dir = null;

var $width = 160;

var $height = 65;

var $jpg_quality = 80;

function __construct( $session_key, $temp_dir ){

$this->session_key = $session_key;

$this->temp_dir = $temp_dir;

}

function _generate_image( $location, $char_seq ){

$num_chars = strlen($char_seq);

$img = imagecreatetruecolor( $this->width, $this->height );

imagealphablending($img, 1);

$weiss = ImageColorAllocate($img,255,255,255);

ImageFilledRectangle($img, 0,0, $this->width, $this->height, $weiss);

$start_x = round($this->width / $num_chars);

$max_font_size = $start_x-5;

$start_x = round(0.5*$start_x);

$max_x_ofs = round($max_font_size*0.9);

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

$r = round( rand( 10, 127 ) );

$g = round( rand( 10, 127 ) );

$b = round( rand( 10, 127 ) );

$y_pos = ($this->height/2)+round( rand( 5, 20 ) );

$fontsize = round( rand( 18, $max_font_size) );

$color = imagecolorallocate( $img, $r, $g, $b);

$presign = 0;

$angle = rand( 2, 20 );

if ($presign==true) $angle = -1*$angle;

ImageTTFText( $img, $fontsize, $angle, $start_x+$i*$max_x_ofs, $y_pos, $color, dirname(__file__).'/../core/ttf/actionj.ttf', substr($char_seq,$i,1) );

}

imagejpeg( $img, $location, $this->jpg_quality );

flush();

imagedestroy( $img );

return true;

}

function get_pic( $num_chars=8 ){

$alphabet = array(

'A','B','C','D','E','F','G','H','I','J','K','L','M',

'N','O','P','Q','R','S','T','U','W','X','Y','Z');

$max = sizeof( $alphabet );

$captcha_str = '';

for ($i=1;$i<=$num_chars;$i++) // from 1..$num_chars

{

$chosen = rand( 1, $max );

$captcha_str .= $alphabet[$chosen-1];

}

if ( $this->_generate_image( $this->temp_dir.'/'.'cap_'.md5( strtolower( $captcha_str )).'.jpg' , $captcha_str ) )

{

$fh = fopen( $this->temp_dir.'/'.'cap_'.$this->session_key.'.txt', "w" );

fputs( $fh, md5( strtolower( $captcha_str ) ) );

return( md5( strtolower( $captcha_str ) ) );

}

else

{

return false;

}}

function verify( $char_seq ){

$fh = fopen( $this->temp_dir.'/'.'cap_'.$this->session_key.'.txt', "r" );

$hash = fgets( $fh );

if (md5(strtolower($char_seq)) == $hash)

return true;

else

return false;

}}

}

?>

<?php

$DO_TITEL="Anmelden";

require_once('core/captcha.class.php');

if (empty($_GET['session_code'])) $session_code = md5(round(rand(0,40000)));

else $session_code=$_GET['session_code'];

$my_captcha = new captcha( $session_code, 'data/__TEMP__/' );

if($_POST[o]=="k" && $my_captcha->verify($_POST['password'])) $cok="ok";