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

PHP Include w/If IE Condition Statement?
I was having a problem with Internet Exploder (big surprise, right?) displaying my drop down menus i

Parse multirow HTML table
Hello all,
I have a site I am working on. Its a sports site and I am trying to add stats to a DB

Quick variable question
hey guys/gals,
im trying to write a php script and it works fine as i have it, but i need to set

.htpasswd Registration Form
Hi,
I wanted to make an htpasswd registration form.
I found this code on the internet but have

SAP Logon Failed
I tried to login to SAP through MMC.

When i click start and give password.

it

problems with contact forms that are only protected against SQL injections
What could be a potential problem with contact forms that are only protected against SQL injections

How can i steam a video on my PHP site? (non YouTube)
Basically I have a PHP site and don't want to give page rank to YouTube. I just want to stream a bas

parsing error
can anyone explain this syntax error:

Parse error: syntax error, unexpected T_IF

The e

Memory Allocation
Hi folks,
see this ex:

int v=5;
v=v+10;

then what will do the compiler before th

script and html conflict in trying to create a header.
I have an error is occurring because of an html webpage with a "php require" at the top of

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