secpic.php

<?
session_start();

$width = 157;                  //Øèðèíà èçîáðàæåíèÿ
$height = 49;                  //Âûñîòà èçîáðàæåíèÿ
$font_size = 13;   			       //Ðàçìåð øðèôòà
$let_amount = 6;               //Êîëè÷åñòâî ñèìâîëîâ, êîòîðûå íóæíî íàáðàòü
$fon_let_amount = 30;           //Êîëè÷åñòâî ñèìâîëîâ, êîòîðûå íàõîäÿòñÿ íà ôîíå
$path_fonts = 'fonts/';        //Ïóòü ê øðèôòàì


$letters = array('0','1','2','3','4','5','6','7','9');
$colors = array('0');

$src = imagecreatetruecolor($width, $height);
$fon = imagecolorallocate($src, 200, 200, 200);
imagefill($src, 0, 0, $fon);

$fonts = array();
$dir = opendir($path_fonts);
while($fontName = readdir($dir))
{
  if($fontName != "." && $fontName != "..")
    $fonts[] = $fontName;
}
closedir($dir);
 
for ($i = 0; $i<$fon_let_amount; $i++)
{
  $color = imagecolorallocatealpha($src, rand(0,255), rand(0,255), rand(0,255), 100); 
  $font = $path_fonts.$fonts[rand(0,sizeof($fonts)-1)];
  $letter = $letters[rand(0,sizeof($letters)-1)];
  $size = rand($font_size-2,$font_size+2);
  imagettftext($src, $size, rand(0,45), rand($width*0.1,$width-$width*0.1), rand($height*0.2,$height), $color, $font, $letter);
}
 
for ($i = 0; $i<$let_amount; $i++)
{
  $color = imagecolorallocatealpha($src, $colors[rand(0,sizeof($colors)-1)], $colors[rand(0,sizeof($colors)-1)], $colors[rand(0,sizeof($colors)-1)], rand(0,50)); 
  $font = $path_fonts.$fonts[rand(0,sizeof($fonts)-1)];
  $letter = $letters[rand(0,sizeof($letters)-1)];
  $size = rand($font_size*2.1-2, $font_size*2.1+2);
  $x = ($i == 0) ?$font_size + rand(5,10) :$x + $font_size + rand(-5,10);
  $y = (($height*2)/3) + rand(-5,15);
  $cod[] = $letter;   
  imagettftext($src, $size, rand(0,15), $x, $y, $color, $font, $letter);
}

$_SESSION['secpic'] = implode('', $cod);

header("Content-type: image/gif"); 
imagegif($src);
?>