Question

I have the following function

public function alpha_custom($str) {
   return (! preg_match("/^([-a-z0-9_-])+$/i", $str)) ? FALSE : TRUE;
}

So, if the string contains anything other than alphanumeric characters, underscores or dashes, then it will return false.

Now I want to add the following:

1. SPACE
2. &
3. ( AND )
4. . (period )

Please help me.
Thanks.

Answer 1

return (preg_match('/[^a-z_\(\)\.\&\ \-0-9]/i', $str)) ? FALSE : TRUE;

EDIT
I have used this to check and it worked for me

function alpha_custom($str)
{
   return (preg_match('/[^a-z_\(\)\.\&\ \-0-9]/i', $str)) ? 'FALSE' : 'TRUE';
}

echo alpha_custom('ravi._ &');