PHP Captcha not working

[jack202872]

Hello,

I wanted to create a captcha to prevent bots from posting on my site. But the php code i use works locally but not online.
Does anybody have any idea why?

<?php
session_start();
function motListe()
{
$liste = array(*list of words*);
return $liste[array_rand($liste)];
}

function image($mot)
{
$size = 32;
$marge = 15;
$font = './angelina.ttf';

$matrix_blur = array(
array(1,1,1),
array(1,1,1),
array(1,1,1));

$box = imagettfbbox($size, 0, $font, $mot);
$largeur = $box[2] - $box[0];
$hauteur = $box[1] - $box[7];
$largeur_lettre = round($largeur/strlen($mot));

$img = imagecreate($largeur+$marge, $hauteur+$marge);
$blanc = imagecolorallocate($img, 255, 255, 255);
$noir = imagecolorallocate($img, 0, 0, 0);

$couleur = array(
imagecolorallocate($img, 0x99, 0x00, 0x66),
imagecolorallocate($img, 0xCC, 0x00, 0x00),
imagecolorallocate($img, 0x00, 0x00, 0xCC),
imagecolorallocate($img, 0x00, 0x00, 0xCC),
imagecolorallocate($img, 0xBB, 0x88, 0x77));

for($i = 0; $i < strlen($mot);++$i)
{
$l = $mot[$i];
$angle = mt_rand(-25,25);
imagettftext($img,$size,$angle,($i*$largeur_lettre)+$marge, $hauteur+mt_rand(0,$marge/2),$couleur[array_rand($couleur)], $font, $l);
}


imageline($img, 2,mt_rand(2,$hauteur), $largeur+$marge, mt_rand(2,$hauteur), $noir);
imageline($img, 2,mt_rand(2,$hauteur), $largeur+$marge, mt_rand(2,$hauteur), $noir);


imageconvolution($img, $matrix_blur,9,0);

imagepng($img);
imagedestroy($img);
}


function captcha()
{
$mot = motListe();
$_SESSION['captcha'] = $mot;
image($mot);
}

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

 

[descalzo]

Define "doesn't work"

 

[jack202872]

There is a white square, where there should be a real image, with a word to be copied to be allowed to post.

 

[essellar]

What is the browser reporting for the request (you'll need to use your browser's developer tools or Firebug)? And are you checking the error log at the server? What happens if you call the image page directly rather the via an IMG tag?

 

[jack202872]

And are you checking the error log at the server?

Yes i am. Nothing from this side.

What happens if you call the image page directly rather the via an IMG tag?

It's exactly the same. It doesn't work better.

 

[gomarc]

Hi jack202872,

Make sure you have the angelina.ttf font uploaded on to your server.

I’m able to reproduce your problem if that file is missing and it works as expected if the file is in place.

 

[jack202872]

That's it ! Thank you. The font was upload, but the extension was in upper case.

Thanks again.

---------- Post added at 09:45 PM ---------- Previous post was at 09:43 PM ----------

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