How To Check For Banned Word On Page With Javascript ?

[bits2017]

Folks,

I'm trying to add a content filter (banned words filter) onto a web proxy. When the Javascript detects any of the banned words on the page, it should:

* As soon as a banned word is detected, it should not check for any more but immediately echo/print on screen/display a warning to the user with the first banned word spotted:
"Banned word "blah" found on page. You will be redirected to Google".
* Then, redirect to Google.
* Dump to database the banned word found, and the url of the page the banned word was found on. Eg.

Banned Word Found|Url|Date & Time of the Server
--------------------------------------------------------
ass|donkey-ass.com|25-01-2007, 03:00:00


The only requirement is that, I should be able to feed a list of banned words it should check for.

What would the code be to do all that ?
I'd like to code see samples.
I'm trying to build one in php but the php gurus say it is best the banned words checking is done on client-side. Else, the page would take too long to load (high cpu usage) if the checking is done on server side. I have no experience in writing Javascript code.


Thank You!

[Niheel]

For live checking of words as they're being typed yes javascript might be the best approach.

You should use a library like jquery to consume the input and run it through a filter and set the alert when it's found.

Take a look at the following github rep
https://github.com/ChaseFlorell/jQuery.ProfanityFilter

[bits2017]

Folks!

Why do you reckon this code does not work ? I only see a blank page.
The code will need to run everytime cURL loads a page so that the JS can check the page for banned words.

<?php
/*
ERROR HANDLING
*/
// 1). Set banned words.
$banned_words = array("Prick","Dick", "blow", "cock");
// 2). $curl is going to be data type curl resource.
$curl = curl_init();
// 3). Set cURL options.
curl_setopt($curl, CURLOPT_URL, 'https://www.buzzfeed.com/mjs538/the-68-words-you-cant-say-on-tv?utm_term=.xlN0R1Go89#.pbdl8dYm3X');
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true );
// 4). Run cURL (execute http request).
$result = curl_exec($curl);
if (curl_errno($curl)) {
    echo 'Error:' . curl_error($curl);
}
$response = curl_getinfo( $curl );
if($response['http_code'] == '200' )
{
?>
<script>
$(function(){
        var pageData = "hello <a>example can have tags! swear word is </a><div> one..</div>";
   if(checkSwear(pageData)== false){
   //redirect to google
   }
});
 
function checkSwear(sentance) {
 
    var swear_words_arr=new Array("blow", "nut", "asshole");
  var regex = new RegExp('\\b(' + swear_words_arr.join('|') + ')\\b', 'i' );
  if(regex.test(sentance)) {
    alert("Please refrain from using offensive words"); /* + alert_text */
    return false;
  } else {
  //alert(1)
      return true;
  }
}
</script>
<?php
}
curl_close($curl);
?>