mirror of
https://github.com/Mibew/tray.git
synced 2025-01-23 18:40:33 +03:00
71 lines
2.0 KiB
PHP
71 lines
2.0 KiB
PHP
<?php
|
|
/*
|
|
* Copyright 2005-2013 the original author or authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
function can_show_captcha()
|
|
{
|
|
return extension_loaded("gd");
|
|
}
|
|
|
|
function gen_captcha()
|
|
{
|
|
$md5_hash = md5(rand(0, 9999));
|
|
return substr($md5_hash, 15, 5);
|
|
}
|
|
|
|
function draw_captcha($security_code)
|
|
{
|
|
|
|
//Set the image width and height
|
|
$width = 100;
|
|
$height = 25;
|
|
|
|
//Create the image resource
|
|
$image = ImageCreate($width, $height);
|
|
if (function_exists('imageantialias')) {
|
|
imageantialias($image, true);
|
|
}
|
|
|
|
//We are making three colors, white, black and gray
|
|
$white = ImageColorAllocate($image, 255, 255, 255);
|
|
$black = ImageColorAllocate($image, 15, 50, 15);
|
|
$grey = ImageColorAllocate($image, 204, 204, 204);
|
|
$ellipsec = ImageColorAllocate($image, 0, 100, 60);
|
|
|
|
//Make the background black
|
|
ImageFill($image, 0, 0, $black);
|
|
imagefilledellipse($image, 56, 15, 30, 17, $ellipsec);
|
|
|
|
//Add randomly generated string in white to the image
|
|
ImageString($image, 5, 30, 4, $security_code, $white);
|
|
|
|
//Throw in some lines to make it a little bit harder for any bots to break
|
|
ImageRectangle($image, 0, 0, $width - 1, $height - 1, $grey);
|
|
imageline($image, 0, $height / 2 + 3, $width, $height / 2 + 5, $grey);
|
|
imageline($image, $width / 2 - 14, 0, $width / 2 + 7, $height, $grey);
|
|
|
|
|
|
//Tell the browser what kind of file is come in
|
|
header("Content-Type: image/jpeg");
|
|
|
|
//Output the newly created image in jpeg format
|
|
ImageJpeg($image);
|
|
|
|
//Free up resources
|
|
ImageDestroy($image);
|
|
}
|
|
|
|
?>
|