[emopoops]

like for registration at my site there cant be usernames of about 50 words i can think of they can all be listed in a text file separated by a space but how do i create a php code for it to check if the username the person chose is one of the 500 words that its not supposed to be?

[MRdNk]

Hi emopoops,

This'll give you what you need.

PHP Code:

<?PHP

// PHP function that does the work
function check_username($input){

    $input = strtolower($input);

    $file_handle = fopen("filename.txt", "rb");
    
    while (!feof($file_handle)) {
    
        $line_of_text = fgets($file_handle);
        $parts = explode(' ', $line_of_text);

        foreach($parts as $value){
            $value = strtolower($value);
            if($input == $value){
                return 0;
            }
        }
    }
    return 1;
    fclose($file_handle);
}

//Example of use

$username = "One";

$result = check_username($username);

if($result == 0){
    echo 'Username not allowed';
}
else{
    echo 'Username accepted';
}
?>

Obviously you can build this into your current username functions.

[emopoops]

thanks thats a good way of doing it. just make sure the words are seperated by a space no commas or anything?

[MRdNk]

Yes, you can change it to a different delimiter, in the explode parameters.

[emopoops]

oh i think im just goingto use this one i figured out. it has like checking for not the exact match but if it contains it.

[MRdNk]

Sounds interesting, please post it - only problem with contains imo is that a persons name may genuinely contain a "dodgy" word - but you can't solve all possible issues. I would just be careful not to limit usernames too much.

[emopoops]

ok heres the code:

$lowercaseusername = preg_replace("/[^a-z]/i", "", $username);
$lowercaseusername = strtolower($lowercaseusername);

$banned = array("scenequeen", "hater", "skank", "emopoops",  "etc...");

$trimthex = str_replace('x', '', $lowercaseusername);

    foreach ($banned as $singleword){
        if (strstr($trimthex, $singleword) != FALSE){
        exit("<center>$username has $singleword in it!<br>
you cannot have $singleword in your usernname!<br><a style='color:deeppink;font-weight:bold;text-decoration:none;cursor:crosshair' href='register.php'>try again?</a></center>");}}