Simple banned words filter

A useful little example which stores a list of banned words in a text file , we then search a string for the banned words and then edit them with the pattern. You could change the pattern at any time by changing the ****** .

We also display a drawback which shows how an innocent phrase can contain the banned words and would be filtered

<?php
function censored($message)
{
//the file with the banned words
$fp = fopen("banned.txt","r");
while($word = fgets($fp,10000))
{
//replace words
$message = ereg_replace(trim($word),"******",$message);
}
return $message;
}
?>

How to use this function

<?php
//our phrases
$msg = "This example is a load of shit";
$msg1 = "I like shitake mushrooms";
//display the censored version
echo censored($msg);
echo "<br>";
//this shaws a drawback of this and most other
//bad words filter , if the banned word appears in ANY WORD
//this is filtered meaning innocent words like shitake
echo censored($msg1);
?>

In action

This example is a load of ******
I like ******ake mushrooms