method isDomain documentation in bbn\Str
Checks if the argument is a valid domain name.
Example
X::dump(\bbn\Str::isDomain("http://bbn.so"));
// (string) false
X::dump(\bbn\Str::isDomain("bbn.so"));
// (bool) true
function($st)
{
return (preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $st) //valid chars check
&& preg_match("/^.{1,253}$/", $st) //overall length check
&& preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $st) ); //length of each label
}
Checks if the argument is a valid domain name. BBN is a suite of PHP and JS libraries and VueJS components - all open-source! bbn.io, build applications, the quick way
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