How to match a string which doesn't contain a dot (.) using regular expression ?

Question

How to match a string which doesn't contain a dot (.) using regular expression ?

Answer 1

why regex??

$str="string_with_no_dots";
if (  strpos ($str,"." ) === FALSE ){
 print "ok, no dots\n";
}

Answer 2

Create a class matching anything except the specified, which is done using [] with the ^ operator. And, as the comments say, you want to match it against the beginning (^) and the end ($) or the string so that we check the entire string.

^[^.]*$

Answer 3

Use this regular expression :

if ( !preg_match ( '/\./',$str ,$val ) )

{

print "ok , no dots\n";

}