aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/inc/functions.inc.php
blob: 6642e5180790dfcbc82202c47f7617dc49c6d70c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
<?php

# global functions

function GET($index) {
	if (isset($_GET[$index]))
		return $_GET[$index];
	return null;
}

function validate_get($value, $type) {
	switch($type) {
		case 'host':
			if (!preg_match('/^[\d\w\W]+$/u', $value))
				return NULL;
		break;
		case 'plugin':
		case 'category':
		case 'type':
			if (!preg_match('/^\w+$/u', $value))
				return NULL;
		break;
		case 'pinstance':
		case 'tinstance':
			if (!preg_match('/^[\d\w-]+$/u', $value))
				return NULL;
		break;
	}

	return $value;
}

function validateRRDPath($base, $path) {
	$realpath = realpath(sprintf('%s/%s', $base, $path));

	if (strpos($realpath, $base) === false)
		return false;

	if (strpos($realpath, $base) !== 0)
		return false;

	if (!preg_match('/\.rrd$/', $realpath))
		return false;

	return $realpath;
}

function crc32hex($str) {
	return sprintf("%x",crc32($str));
}

function error_image() {
	header("Content-Type: image/png");
	readfile('layout/error.png');
	exit;
}

?>