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qemudb/include/filter.php

75 lines
2.9 KiB
PHP

<?php
$aClean = array();
filter_gpc();
/*
* Make all get/post/cookies variable clean based on their names.
*/
function filter_gpc()
{
global $aClean;
$aKeys = array_keys($_REQUEST);
for($i=0; $i < sizeof($aKeys); $i++)
{
// Special cases for variables that don't fit our filtering scheme
// don't filter the AppDB session cookie and MAX_FILE_SIZE
// and the DialogX values that xinha uses
if($aKeys[$i] == "whq_appdb" || ($aKeys[$i] == "MAX_FILE_SIZE") || ($aKeys[$i] == "PHPSESSID")
|| (strpos($aKeys[$i], "Dialog") == 0) || (strpos($aKeys[$i], "pref_") == 0))
{
// copy the key over to the clean array
$aClean[$aKeys[$i]] = trim(strip_tags($_REQUEST[$aKeys[$i]]));
continue; // go to the next entry
}
switch($aKeys[$i][0])
{
case "i": // integer
case "f": // float
if(is_numeric($_REQUEST[$aKeys[$i]]))
$aClean[$aKeys[$i]] = $_REQUEST[$aKeys[$i]];
elseif(empty($_REQUEST[$aKeys[$i]]))
$aClean[$aKeys[$i]] = 0;
else
util_show_error_page_and_exit("Fatal error: ".$aKeys[$i]." should be a numeric value.");
break;
case "b": // boolean
if($_REQUEST[$aKeys[$i]]=="true" || $_REQUEST[$aKeys[$i]]=="false")
$aClean[$aKeys[$i]] = $_REQUEST[$aKeys[$i]];
else
util_show_error_page_and_exit("Fatal error: ".$aKeys[$i]." should be a boolean value.");
break;
case "s": // string
switch($aKeys[$i][1])
{
case "h": // HTML string
$aClean[$aKeys[$i]] = trim(htmlspecialchars($_REQUEST[$aKeys[$i]]));
// if there is no content and no image, make the variable empty
if(strip_tags($aClean[$aKeys[$i]],'<img>')=="")
$aClean[$aKeys[$i]] = "";
break;
default: // normal string (no HTML)
$aClean[$aKeys[$i]] = trim(strip_tags($_REQUEST[$aKeys[$i]]));
break;
}
break;
case "a": // array
if(!is_array($_REQUEST[$aKeys[$i]]))
util_show_error_page_and_exit("Fatal error: ".$aKeys[$i]." should be an array.");
break;
default:
util_show_error_page_and_exit("Fatal error: type of variable ".$aKeys[$i]." is not recognized.");
break;
}
}
/* null out all input data so we can be assured that */
/* no unfiltered values are being used */
$_REQUEST = array();
$_POST = array();
$_GET = array();
if(APPDB_DONT_CLEAR_COOKIES_VAR != "1")
$_COOKIES = array();
}
?>