function ValidatePresence($fields_required)
{
global $errors;
foreach ($fields_required as $field) {
$value = trim($_POST[$field]);
if (!HasPresence($value)) {
$errors[$field] = FieldNameAsText($field) . " can't be blank";
}
}
}
<?php
// require_once ("validation_functions.php");
function RedirectTo($new_location)
{
header("Location: " . $new_location);
}
$errors = array();
$message = "";
if (isset($_POST["submit"])) {
$username = trim($_POST["username"]);
$password = trim($_POST["password"]);
//Validations
$fields_required = array("username", "password");
foreach ($fields_required as $field) {
$value = trim($_POST[$field]);
if (!HasPresence($value)) {
$errors[$field] = ucfirst($field) . " can't be blank";
}
}
$fields_with_max_lengths = array("username" => 10, "password" => 3);
ValidateMaxLengths($fields_with_max_lengths);
// Login
if (empty($errors)) {
if ($username == "Vera" && $password == "123") {
RedirectTo("index.php");
} else {
$message = "Username/password doesn't match";
}
}
} else {
$username = "";
<!DOCTYPE html>
<html>
<head>
<title>Validation Errors</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<?php
require_once "validation_functions.php";
$errors = array();
$username = trim("");
if (!HasPresence($username)) {
$errors["username"] = "******";
}
echo FormErrors($errors);
?>
</body>
</html>
