<?php
session_start();
header('Content-type: image/png'); 
header("Cache-Control: no-store, no-cache, must-revalidate");
$width = 136; 
$height = 47;
$img = imagecreatetruecolor($width, $height);
$randbg = rand(1,2);
$img = imageCreateFromPng('images/bg'.$randbg.'.png');
$type = rand(1,2);
if ($type == 1){
  $capchaResult = rand(1, 8);
  for ($i=1; $i <= $capchaResult; $i++){ 
    $stars = imageCreateFromPng('images/star'.rand(1,3).'.png');
    $x = 15*$i+1;
    $y = rand(0,1)*16+2;
    ImageCopy($img, $stars, $x, $y, 0, 0, 16, 16);
  } 
}elseif ($type == 2){ 
  $font = 'fonts/flow_b.ttf';
  $fontsize = rand(15,20);
  $img = imagecreatetruecolor($width, $height);
  $randbg = rand(1,2);
  $img = imageCreateFromPng('images/bg'.$randbg.'.png');
  $capchaText = '';
  $capchaResult = 0;
  $a = rand(1, 8);
  $b = rand(1, 8);
  $z = $a + $b;
  if ($a == $b){
    $a = 6;
    $b = 2;
    $capchaText = $a . '-' . $b;
    $capchaResult = $a - $b;
  }elseif ($z <= 8){
    $capchaText = $a . '+' . $b;
    $capchaResult = $a + $b;
  } 
  else if ($z > 8 && $a > $b){
    $capchaText = $a . '-' . $b;
    $capchaResult = $a - $b;
  }elseif ($z > 8 && $a < $b){
    $capchaText = $b . '-' . $a;
    $capchaResult = $b - $a;
  }else{
    $capchaText = $a . '+' . $b;
    $capchaResult = $a + $b;
  } 
  for ($i = 0; $i < strlen($capchaText); $i++){   
    $litteral = $capchaText[$i]; 
    if ($i == 0) { 
      $x = ($width - rand(60, 120));            
    }else{
      $x = $x + rand(15,20);
    } 
    $y = $height - (($height - ($fontsize - rand(1,9))) / 2);    
    $color = imagecolorallocate($img, 250, 250, 250 ); 
    $naklon = rand(-10, 10);
    imagettftext($img, $fontsize, $naklon, $x, $y, $color, $font, $litteral);
  }
}
$_SESSION['view']['captcha'] = $capchaResult;
imagepng($img); 
imagedestroy($img);