/captcha.php

<?php

define('IN_EZRPG', true);



require_once('init.php');



//$code_length = rand(5,6);

$code_length = 4;

$rand_start = mt_rand(0, 250);

$font = 'static/fonts/Capture_it.ttf';

$fontSize = 30;

$padding = 10;



$l1 = strtoupper(createKey(1, 1));

$l2 = strtoupper(createKey(1, 1));

$l3 = strtoupper(createKey(1, 1));

$l4 = strtoupper(createKey(1, 1));

$verify_string = $l1 . ' ' . $l2 . ' ' . $l3 . ' ' . $l4;

$real_string = $l1 . $l2 . $l3 . $l4;

$verify_code = sha1(strtoupper($real_string) . SECRET_KEY);



$_SESSION['verify_code'] = $verify_code;



function makeRBGColor($color, $image)

{

    $color = str_replace("#", "", $color);

    $red = hexdec(substr($color, 0, 2));

    $green = hexdec(substr($color, 2, 2));

    $blue = hexdec(substr($color, 4, 2));

    $out = ImageColorAllocate($image, $red, $green, $blue);

    return $out;

}



$wordBox = imageftbbox($fontSize, 0, $font, $verify_string);



$wordBoxWidth = $wordBox[2];

$wordBoxHeight = $wordBox[1] + abs($wordBox[7]);



$containerWidth = $wordBoxWidth + ($padding * 2);

$containerHeight = $wordBoxHeight + ($padding * 2);



$textX = $padding;

$textY = $containerHeight - $padding;



$captchaImage = imagecreate($containerWidth, $containerHeight);



$red = randColor();

$green = randColor();

$blue = randColor();

$backgroundColor = ImageColorAllocate($captchaImage, $red, $green, $blue);



$rred = 255-$red;

$rgreen = 255-$green;

$rblue = 255-$blue;

$textColor = ImageColorAllocate($captchaImage, $rred, $rgreen, $rblue);



imagefttext($captchaImage, $fontSize, 0, $textX, $textY, $textColor, $font, $verify_string);



$angle = mt_rand(-3, 3);

$captchaImage = imagerotate($captchaImage, $angle, $backgroundColor);





$line = ImageColorAllocate($captchaImage, $rred, $rgreen, $rblue);



for($i = 0; $i < 10; $i++)

{

    $xStart = mt_rand(0, $containerWidth);

    $yStart = mt_rand(0, $containerHeight);

    $xEnd = mt_rand(0, $containerWidth);

    $yEnd = mt_rand(0, $containerHeight);

    imageline($captchaImage, $xStart, $yStart, $xEnd, $yEnd, $line);

}





imagefilter($captchaImage, IMG_FILTER_CONTRAST, 1);

//imagefilter($captchaImage, IMG_FILTER_BRIGHTNESS, 10);



//imagefilter($captchaImage, IMG_FILTER_EDGEDETECT);

imagefilter($captchaImage, IMG_FILTER_GAUSSIAN_BLUR);



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

ImagePNG($captchaImage);

?>