<?php
getValidate(100,30);
function getValidate($w,$h) {
$img = imagecreate($w,$h);
$gray = imagecolorallocate($img,255,255,255);
$black = imagecolorallocate($img,rand(0,200),rand(0,200),rand(0,200));
$red = imagecolorallocate($img,255,0,0);
$white = imagecolorallocate($img,255,255,255);
$green = imagecolorallocate($img,0,255,0);
$blue = imagecolorallocate($img,0,0,255);
imagefilledrectangle($img,0,0,100,30,$black);
for($i = 0;
$i < 80;
$i++) {
imagesetpixel($img,rand(0,$w),rand(0,$h),$gray);
}
$num1 = rand(1,99);
$num2 = rand(1,99);
imagestring($img,5,5,rand(1,10),$num1,$red);
imagestring($img,5,30,rand(1,10),getRand(),$white);
imagestring($img,5,45,rand(1,10),$num2,$green);
imagestring($img,5,65,rand(1,10),"=",$blue);
imagestring($img,5,80,rand(1,10),"?",$red);
header("content-type:image/png");
imagepng($img);
imagedestroy($img);}function getRand() {
$code = rand(0,1);
switch ($code) {
case 0:return "+";
break;
case 1:return "-";
break;
default:# code...
break;
}
}?>
