Tag: xss

Prevent XSS attacks when echoing HTML using PHP

I have a simple bimple function which echoes this: This just works fine, but If a user edits the HTML using a Chrome or Firefox, he can modify the code to output something like: I have set the only http on the php ini relating the cookies, but is there any way to prevent the user from modifying and successfully

string to xHH in PHP

encode owasp php websecurity xss

I am curious is that any build in or easier way to encode string to xHH format in PHP? I am trying to implement rule 3 and rule 4 from XSS OWASP Prevention with build in function or easier approach. but, I can’t find any in the internet. as far as I found, I need to make manual encoder/decoder for

Deprecated each in code igniter xssclean helper

codeigniter deprecated each php xss

I have a codeigniter helper called xssclean for input validating form data If i give array it show each deprecated error. Here is my function in my xssclean_helper.php function xssclean($str) { if (…

htmlspecialchars() on array of values fetch

arrays htmlspecialchars php security xss

Lets say I fetch data with PDO $stmt = $this->dbh->prepare(“SELECT * FROM posts”); $stmt->execute(); $result = $stmt->fetchAll(); return $result; How should I use …

PHP How to echo without HTML tags

escaping html php xss

I have a sort of system where everybody can type whatever he wants. Though, they can also seem to use tags like , etc. How …

PHP XSS sanitization

html-entities javascript php xss

Questions: What are the best safe1(), safe2(), safe3(), and safe4() functions to avoid XSS for UTF8 encoded pages? Is it also safe in all browsers (specifically IE6)? . Many people say the absolute best that can be done is: . . There are a hell of a lot of posts about PHP and XSS. Most just say “use HTMLPurifier” or