Файл: captcha.php
Строк: 23
<?
$width = 97;
$height = 27;
$sign = 5;
$code = "";
session_start();
$letters = array('a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'j', 'k', 'm', 'n',
'p', 'q', 'r', 's', 't', 'u',
'v', 'w', 'x', 'y', 'z', '2',
'3', '4', '5', '6', '7', '8', '9');
$figures = array('50', '70', '90', '110',
'130', '150', '170', '190', '210');
$img = imagecreatetruecolor($width, $height);
$fon = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $fon);
for ($i = 0; $i < $sign; $i++) {
$h = 1;
$color = imagecolorallocatealpha(
$img, $figures[rand(0, count($figures) - 1)], $figures[rand(0, count($figures) - 1)], $figures[rand(0, count($figures) - 1)], rand(10, 30));
$letter = $letters[rand(0, sizeof($letters) - 1)];
if (empty($x))
$x = $width * 0.08;
else
$x = $x + ( $width * 0.8 ) / $sign + rand(0, $width * 0.01);
if ($h == rand(1, 2))
$y = ( ( $height * 1 ) / 4 ) + rand(0, $height * 0.1);
else
$y = ( ( $height * 1 ) / 4 ) - rand(0, $height * 0.1);
$code.= $letter;
imagestring($img, 6, $x, $y, $letter, $color);
}
$_SESSION['code'] = $code;
header("Content-type: image/jpeg");
imagejpeg($img);
?>