<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<title>Formulario de Ejemplo</title>
<style>
.required {
background-color: yellow;
}
.disabled {
background-color: lightgray;
}
</style>
</head>
<body>
<?php
$name = $age = "";
$nameErr = $ageErr = "";
$currentDate = date("Y-m-d");
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "El nombre es obligatorio";
} else {
$name = test_input($_POST["name"]);
}
if (!empty($_POST["age"])) {
if (!is_numeric($_POST["age"])) {
$ageErr = "La edad debe ser un número";
$age = "";
} else {
$age = test_input($_POST["age"]);
}
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<h2>Formulario de Ejemplo</h2>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Nombre: <input type="text" name="name" class="required" value="<?php echo $name;?>">
<span><?php echo $nameErr;?></span>
<br><br>
Edad: <input type="text" name="age" value="<?php echo $age;?>">
<span><?php echo $ageErr;?></span>
<br><br>
Fecha Actual: <input type="text" class="disabled" value="<?php echo $currentDate;?>" disabled>
<br><br>
<input type="submit" name="submit" value="Enviar">
</form>
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST" && empty($nameErr) && empty($ageErr)) {
echo "<h3>Datos recibidos:</h3>";
echo "Nombre: " . $name . "<br>";
if (!empty($age)) {
echo "Edad: " . $age . "<br>";
}
}
?>
</body>
</html>