Check Valid Email – Regular expression

Regular Expression Pattern : /[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+.[a-zA-Z]+/

function is_valid_email($email)
{
if(preg_match("/[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+.[a-zA-Z]+/", $email) > 0)
return true;
else
return false;
}