[PHP] Banned username

[Yuio]

EDIT:
A user can bypass it by putting other characters... For example:
If a user create an account named: "admin" It blocks it, but if someone create an account named: "33Admin22" it let him create the account. How can fix it?
____


I'm new in Php and i'm trying to put a filter when someone register on my website
I put this on top of the page

$banword = array("admin","adm1n");

elseif ($name == $banword){
    echo 'username not allowed';
    exit();
}

It doesn't work can some fix this problem?

 

[foxx]

um, you'd need to loop through that array, but I guess it would be much easier just to do this

$notAllowed = "admin";
$notAllowed2 = "adm1n";

if($name == $notAllowed OR $name == $notAllowed2) {
    echo 'username not allowed';
    exit();
}

 

[Meth0d]

Obviously that wont work -- $name is never equal to the $banword array. Use in_array() to check if a item is contained within a array.

if (in_array($name, $banword))
{
// username not allowed
}

What foxx posted could work as well, though this may be easier, dunno.

 

[onemorejosh]

...Or you could just create the admin and adm1n accounts yourself before anyone else does

 

[IQstim]

Obviously that wont work -- $name is never equal to the $banword array. Use in_array() to check if a item is contained within a array.

if (in_array($name, $banword))
{
// username not allowed
}

Definitely; efficient too!

...Or you could just create the admin and adm1n accounts yourself before anyone else does

OneMoreJosh suggesting the bargain technique.

 

[Yuio]

Obviously that wont work -- $name is never equal to the $banword array. Use in_array() to check if a item is contained within a array.

if (in_array($name, $banword))
{
// username not allowed
}

What foxx posted could work as well, though this may be easier, dunno.

It works ! Thanks.

EDIT:
A user can bypass it by putting other characters... For example:
If a user create an account named: "admin" It blocks it, but if someone create an account named: "33Admin22" it let him create the account. How can fix it?

 

[BBim]

It would be something like this:

$name = strtolower($name);
foreach ($banword as $word){
	if (strpos($name, $word) === false){
		echo 'username not allowed';
		exit();
	}
}