Pull Request Dev_1.0

as convention po, function names starting with 'is' / 'has' should only return boolean true/false po
ex : 
```
function is_email_address($email)
{
    if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
        return true;
    }
    return false;
}
```