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

$variable = $variable
Hello

Sorry if this is a really simple question but I have run out of ideas. Is there a reall

Pspell with my own dictionary
Hello!
I've tested two cases using pspell functions.
1)
Code: $dictionary_link = pspell_new

Call db table from any PHP file
Hi,

I want to be able to call a database table that will be setup in another file called init

Inserting multiple records from single form
I've found a number of threads that deal with this issue, but I'm new to php and coding language so

getting weird error..
okay, I'm getting an error on this particular function, something about the syntax in the mysql LIMI

Problem executing bash script using shell_exec
Hi there,
I created a bash script file using following code to convert doc documents to pdf using

How To Make More Than One Redirection with PHP on the same page?
Hey im trying to do a direction page where it open differently link direction pages every time som

Retrieving the 25 most recently added entries from all tables in a MySQL databas
Hello,

The code below works great. It creates a table that shows the 25 most recently added t

Doubles are giving me problems
Ok so, first of all i made a double = 0.05, but when running the debugger it shows up as 0.04999. I

Revoking alter any table from a schema
Hi All,

i am working in Oracle 10g.
my requirement is to revoke all kind of DDL oper

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