captcha.php — Appointment Booking Calendar 1.3.94

appointment-booking-calendar / captcha / captcha.php

appointment-booking-calendar / captcha Last commit date

captcha.php 1 year ago font-1.ttf 1 year ago font-2.ttf 1 year ago font-3.ttf 1 year ago font-4.ttf 1 year ago no-gd-library.png 1 year ago

captcha.php

164 lines

1	<?php
2	/*
3	PHP Captcha by Codepeople.net
4	http://www.codepeople.net
5	*/
6
7	if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
8
9	if (!ini_get("zlib.output_compression")) ob_clean();
10
11	header("Cache-Control: no-store, no-cache, must-revalidate");
12	header("Pragma: no-cache");
13
14	if (!isset($_GET["ps"])) $_GET["ps"] = '';
15	if (!isset($_GET["bcolor"]) \|\| $_GET["bcolor"] == '') $_GET["bcolor"] = "FFFFFF";
16	if (!isset($_GET["border"]) \|\| $_GET["border"] == '') $_GET["border"] = "000000";
17
18	//configuration
19	$imgX = min( ( isset($_GET["width"]) && is_numeric( $_GET["width"] ) )? intval($_GET["width"]) : "180" , 800);
20	$imgY = min( ( isset($_GET["height"]) && is_numeric( $_GET["height"] ) )? intval($_GET["height"]) : "60" , 600);
21
22	$letter_count = min( ( isset($_GET["letter_count"]) && is_numeric( $_GET["letter_count"] ) )? intval($_GET["letter_count"]) : "5", 20);
23	$min_size = min( ( isset($_GET["min_size"]) && is_numeric( $_GET["min_size"] ) )? intval($_GET["min_size"]) : "35", 200);
24	$max_size = min( ( isset($_GET["max_size"]) && is_numeric( $_GET["max_size"] ) )? intval($_GET["max_size"]) : "45", 200);
25	$noise = min( ( isset($_GET["noise"]) && is_numeric( $_GET["noise"] ) )? intval($_GET["noise"]) : "200", 5000);
26	$noiselength = min( ( isset($_GET["noiselength"]) && is_numeric( $_GET["noiselength"] ) )? intval($_GET["noiselength"]) : "5", 50);
27	$bcolor = cpcff_decodeColor($_GET["bcolor"]);
28	$border = cpcff_decodeColor($_GET["border"]);
29
30	$noisecolor = 0xcdcdcd;
31	$random_noise_color= true;
32	$tcolor = cpcff_decodeColor("666666");
33	$random_text_color= true;
34
35	function cpcff_decodeColor($hexcolor)
36	{
37	$color = hexdec($hexcolor);
38	$c["b"] = $color % 256;
39	$color = $color / 256;
40	$c["g"] = $color % 256;
41	$color = $color / 256;
42	$c["r"] = $color % 256;
43	return $c;
44	}
45
46	function cpcff_similarColors($c1, $c2)
47	{
48	return sqrt( pow($c1["r"]-$c2["r"],2) + pow($c1["g"]-$c2["g"],2) + pow($c1["b"]-$c2["b"],2)) < 125;
49	}
50
51	if (function_exists('session_start')) @session_start();
52
53	function cpcff_make_seed() {
54	list($usec, $sec) = explode(' ', microtime());
55	return (float) $sec + ((float) $usec * 100000);
56	}
57	mt_srand(cpcff_make_seed());
58	$randval = mt_rand();
59
60	$str = "";
61	$length = 0;
62	for ($i = 0; $i < $letter_count; $i++) {
63	$str .= chr(mt_rand(97, 122))." ";
64	}
65	$_SESSION['rand_code'.sanitize_key($_GET["ps"])] = str_replace(" ", "", $str);
66
67	$uidt = uniqid();
68	set_transient( "cpeople-captcha-".$uidt , str_replace(" ", "", $str) , 1800 );
69	setCookie('rand_code'.sanitize_key($_GET["ps"]), $uidt, time()+36000,"/");
70
71	if (!function_exists('imagecreatetruecolor'))
72	{
73	header("Content-type: image/png");
74	readfile( dirname( __FILE__ ) . "/no-gd-library.png");
75	exit;
76	}
77
78	$image = imagecreatetruecolor($imgX, $imgY);
79	$backgr_col = imagecolorallocate($image, $bcolor["r"],$bcolor["g"],$bcolor["b"]);
80	$border_col = imagecolorallocate($image, $border["r"],$border["g"],$border["b"]);
81
82	if ($random_text_color)
83	{
84	do
85	{
86	$selcolor = mt_rand(0,256256256);
87	} while ( cpcff_similarColors(cpcff_decodeColor($selcolor), $bcolor) );
88	$tcolor = cpcff_decodeColor($selcolor);
89	}
90
91	$text_col = imagecolorallocate($image, $tcolor["r"],$tcolor["g"],$tcolor["b"]);
92
93	imagefilledrectangle($image, 0, 0, $imgX, $imgY, $backgr_col);
94	imagerectangle($image, 0, 0, $imgX-1, $imgY-1, $border_col);
95	for ($i=0;$i<$noise;$i++)
96	{
97	if ($random_noise_color)
98	$color = mt_rand(0, 256256256);
99	else
100	$color = $noisecolor;
101	$x1 = mt_rand(2,$imgX-2);
102	$y1 = mt_rand(2,$imgY-2);
103	imageline ( $image, $x1, $y1, mt_rand($x1-$noiselength,$x1+$noiselength), mt_rand($y1-$noiselength,$y1+$noiselength), $color);
104	}
105
106
107	if (empty($_GET["font"]))
108	$selected_font = "font-1.ttf";
109	else
110	{
111	switch (@$_GET["font"]) {
112	case "font-2.ttf":
113	case "font2":
114	$selected_font = "font-2.ttf";
115	break;
116	case "font-3.ttf":
117	case "font3":
118	$selected_font = "font-3.ttf";
119	break;
120	case "font-4.ttf":
121	case "font4":
122	$selected_font = "font-4.ttf";
123	break;
124	default:
125	$selected_font = "font-1.ttf";
126	}
127	}
128
129	$font = dirname( __FILE__ ) . "/". $selected_font;
130
131	$font_size = rand($min_size, $max_size);
132
133	$angle = rand(-15, 15);
134
135	if (function_exists("imagettfbbox") && function_exists("imagettftext"))
136	{
137	$box = imagettfbbox($font_size, $angle, $font, $str);
138	$x = (int)($imgX - $box[4]) / 2;
139	$y = (int)($imgY - $box[5]) / 2;
140	imagettftext($image, $font_size, $angle, $x, $y, $text_col, $font, $str);
141	}
142	else if (function_exists("imageFtBBox") && function_exists("imageFTText"))
143	{
144	$box = imageFtBBox($font_size, $angle, $font, $str);
145	$x = (int)($imgX - $box[4]) / 2;
146	$y = (int)($imgY - $box[5]) / 2;
147	imageFTText ($image, $font_size, $angle, $x, $y, $text_col, $font, $str);
148	}
149	else
150	{
151	$angle = 0;
152	$font = 6;
153	$wf = ImageFontWidth(6) * strlen($str);
154	$hf = ImageFontHeight(6);
155	$x = (int)($imgX - $wf) / 2;
156	$y = (int)($imgY - $hf) / 2;
157	imagestring ( $image, $font, $x, $y, $str, $text_col);
158	}
159
160	header("Content-type: image/png");
161	imagepng($image);
162	imagedestroy ($image);
163	exit;
164	?>