Check if multiple strings are empty [duplicate]

Answer 1

You could try creating a general validation class that could be reused and be more precise.

Some pseudo code:

 array(
            "empty" => array(
                "rule"          => "some regex",
                "errorMessage"  => "name may not be empty"
            ),
            "noNumbers" => array(
                "rule"          => "some regex",
                "errorMessage"  => "No numbers are allowed in the name field"
            )
        ),
        "otherVariable" => array(
            "atLeast50chars" => array(
                "rule"          => "some regex",
                "errorMessage"  => "This field must be at least 50 chars"
            )
        )
    );


    public function Validate($post){
        $errors = array();

        foreach($_POST as $key => $value){
            if(!array_key_exists($key, $validators)) {
                continue;
            }

            foreach($validators[$key] as $validator) {
                if(!preg_match($validator["rule"], $value) {
                    $errors[$key] = $validator["errorMessage"];
                    break;
                }
            }
        }

        return $errors;
    }
}


?>

Then in your code you could do something like:

$errors = Validate($_POST);
foreach($error as $errorMessage) {
    echo $errorMessage . "
";
}

Of course you could fancy this up, adding divs with classes right below/beside the concerning input field and load the $errorMessage into there. I'm sure there's loads of examples out there :)