distribution/source/index/seccode.php

<?php


namespace app\index;

class seccode extends Base
{
	function index()
	{
		header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
		header("Cache-Control: no-cache, must-revalidate");
		header("Pragma: no-cache");
		header("Content-type: image/png");
		$authnum_session = NULL;
		for ($i = 0; $i < 4; $i++) {
			$authnum_session .= rand(0, 9);
		}
		$_SESSION['code'] = $authnum_session;
		$im = imagecreate(50, 24);
		ImageColorAllocate($im, 30, 144, 255);
		imagestring($im, 5, 8, 2, $authnum_session, ImageColorAllocate($im, 255, 255, 255));
		for ($i = 0; $i < 3; $i++) {
			imageline($im, rand(0, 30), rand(0, 21), rand(20, 40), rand(0, 21), ImageColorAllocate($im, 220, 220, 220));
		}
		for ($i = 0; $i < 90; $i++) {
			imagesetpixel($im, rand() % 70, rand() % 30, ImageColorAllocate($im, 200, 200, 200));
		}
		ImagePNG($im);
		ImageDestroy($im);
	}
}