Rejecting characters

[acctman]

I would like to have the code re-written so that it rejects all characters that is not A-Z,a-z,0-9

 

//illegal characters in username?
        $illegal = array('#','?','&','"','/','%','!','$','\'','*','-','_','~');
        foreach ($illegal as $value)
            if (strpos($en['user'],$value) !== false)
                $ill = true;

        if ($ill)
            $err .= _reg_illegal.'<br>';

[Stooney]

php.net/preg_match

[acctman]

if someone can help me with recoding this that would be great

[aschk]

Deary me, too busy wanting to not actually look it up eh...

 

$regex = '/([a-z0-9]+)/i';

if(preg_match($regex,$string)){

  echo "it's good";

} else {

  echo "it's bad";

}

 

What about spaces?

[acctman]

Deary me, too busy wanting to not actually look it up eh...

 

$regex = '/([a-z0-9]+)/i';

if(preg_match($regex,$string)){

  echo "it's good";

} else {

  echo "it's bad";

}

 

What about spaces?

 

no spaces. thanks

[acctman]

how would i apply this to my existing code?

 

//illegal characters in username?
        $illegal = array('#','?','&','"','/','%','!','$','\'','*','-','_','~');
        foreach ($illegal as $value)
            if (strpos($en['user'],$value) !== false)
                $ill = true;

        if ($ill)
            $err .= _reg_illegal.'<br>';

[aschk]

Read my code and figure it out