Check string for blacklisted words?

[SaMike]

Im creating login system to my webpage. On registering i'd wish to check if username got any part blacklisted.

So if i blacklist word 'shit' and user tries 'youreshitlol' it would return error because PART of it is blacklisted.

 

How could i achieve this (with multiple blacklisted words)?

[Alex]

$blackList = array(
    'shit',
    'crap'
);

$valid = true;
foreach($blackList as $blackItem)
{
    if(strpos($str, $blackItem) !== false)
    {
         valid = false;
         break;
    }
}

if(!$valid)
{
    // Did not validate
}

[the182guy]

Another way...

 

$badwords = "badword1|badword2|badword3|badword4|badword5|badword6";

$subject = 'my name is badword4';

if (preg_match ("/$badwords/", $subject))
{
// bad word found

}
else
{
// not found

}