secpic.php

<?php session_start();

 $width = 100;
 $height = 60;
 $font_size = 17.5;
 $let_amount = 4;
 $fon_let_amount = 30;
 $path_fonts = 'fonts/';

 $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','9');
 $colors = array('10','30','50','70','90','110','130','150','170','190','210');
 
 $src = imagecreatetruecolor($width,$height);
 $fon = imagecolorallocate($src,84,151,196);
 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,rand(27, 37),rand(59, 69),rand(80, 90), 0);
   $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+1)*$font_size + rand(4,7);
   $y = (($height*2)/3) + rand(0,5);
   $cod[] = $letter;   
   imagettftext($src,$size,rand(0,15),$x,$y,$color,$font,$letter);
 }
 
 $_SESSION['secpic'] = implode('',$cod);
 
 header ("Content-type: image/gif"); 
 imagegif($src);