Sufficient protection from bad input?


Posted on 16th Feb 2014 07:03 pm by admin

I am writing a simple script to let people upload 'pages' of their own content, be it simply a few bits of HTML, pictures and whatnot, and recieve their own url.. I've without testing, wrote this part of the script to clean the input, are there major security risks?

function cleanInput($input) {
$search = array(
Did you know?Explore Trending and Topic pages for more stories like this.
'@<script[^>]*?>.*?</script>@si', // Strip out javascript
);
$output = preg_replace($search, '', $input);
return $output;
}
function sanitize($input) {
if (is_array($input)) {
foreach($input as $var=>$val) {
$output[$var] = sanitize($val);
}
}
else {
if (get_magic_quotes_gpc()) {
$input = stripslashes($input);
}
$input = cleanInput($input);
$output = mysql_real_escape_string($input);
}
return $output;
}
//Define date for entry
$date = date("Y-m-d");

//clean input
$_title = sanitize(cleaninput($_POST['title']));
$_uid = sanitize(cleaninput($_POST['uid']));
$_desc = sanitize(cleaninput($_POST['desc']));
$_content = sanitize(cleaninput($_POST['content']));

// Insert a row of information into the table with function
function insert($title, $uid, $desc, $date, $content) {
mysql_query("INSERT INTO pageit
(title, userid, `desc`, dateadded, content) VALUES('"._$title."','".$_uid."','".$_desc."','".$date."','".$_content."') ")
or die(mysql_error());
}
// Do the insert with the cleaned data!
insert($_title, $_uid, $_desc, $date, $_content);
//Done script stuff for now..

No comments posted yet

Your Answer:

Login to answer
130 Like 37 Dislike
Previous forums Next forums
Other forums

problems with search form numerical "between" sending by php
I am trying to display the results of a search, on a sql database, on a web page. I set up html &quo

Send current URL in URL with a $_GET variable problem.
Hello community,

I have created a function that gets the current variable of a page, example:

Session problem?!?
Hello All! I am very new to the php world but I am working on fixing things that a previous programm

search function
HI guys,

if anyone could point us in the right direction of how to do this, or provide some t

a very simple php header question (sorry!)
Firstly...I do apologise if this annoys anyone....a header error

I'm do not know php &

if description does not contain the following words
Hello everyone,

I am parsing a MS Excel (.xls) file and adding it's content to a mySQL databa

How to show next and prev records
Hi all,

Sorry if this is simple, i'm very new to php, well, any programming language actually

ECC6 - Single sign-on
We are in the process of upgrading to ECC 6 which will support single sign on with user passwords al

Creating a function
Basically i wanna put all this code in a seperate file

Code: <?php

mail()
Hi all. I have a problem with emails. I am trying to set up a mail system where customers can subscr

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash