My question is as follows, I have the following function:
$site = preg_replace("/[^a-zA-Z0-9]/", "", $_POST['site']);
But when using the string www.lostscavenge.com , this regular expression issues the following return: wwwlostscavengecombr
How do I allow this function to allow and do not remove the points?
Domain names can currently be unicode (utf8). Depending on the rules of your business model, if you need to allow domains that have non-ASCII characters, the following routine can be useful:
function validate_domain_name($str, $force_utf8 = true)
{
$force_utf8 = $force_utf8? 'u': '';
//Isso é ineficiente.
//$re = '[^a-zA-Z0-9\.]';
//Isso é ineficiente. Pois não valida normas básicas
//$re = '^(http[s]?\:\/\/)?((\w+)\.)?(([\w-]+)?)(\.[\w-]+){1,2}$';
//Esse é mais consistente
$re = '^(?!\-)(?:[\w\d\-]{0,62}[\w\d]\.){1,126}(?!\d+)[\w\d]{1,63}$';
if (preg_match('/'.$re.'/'.$force_utf8, $str, $rs) && isset($rs[0]) && !empty($rs[0])) {
return $rs[0];
} else {
return null;
}
}
$str = '000-.com';
$str = '-000.com';
$str = '000.com'; // válido
$str = 'foo-.com';
$str = '-foo.com';
$str = 'foo.com'; // válido
$str = 'foo.any'; // válido
$str = 'お名前0.com'; // válido
$str = 'お名前.コム'; // válido
echo 'domain: '.validate_domain_name($str);
To disable unicode, set the second parameter to Boolean false .
The original regular expression has been adapted from this response: link
The adaptations I made were to change a-zA-Z to \w and add the option to include the u flag, which allows non-ASCII characters.
Just add the dot to your pattern:
$site = preg_replace("/[^a-zA-Z0-9\.]/", "", $_POST['site']);
This is \. at the end of the pattern. The \ is to escape the period (.), Because in regular expressions . means any character