php-demo-project/superglobals.php at main · nbvan239/php-demo-project · GitHub

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<?php
    echo "Superglobals in PHP<br>";
    //print_r($_SERVER);
    //print_r($_POST);
    //We will send data through url or form using $_GET / $_POST
    /*
    if(isset($_GET['name'])) {
        echo $_GET['name'];
    }
    if(isset($_GET['age'])) {
        echo $_GET['age'];
    }
    */
    //<script>alert('This is javascript code');</script>
    //$email = htmlspecialchars($_POST['email']) ?? '';//coalescing
    //another way
    $email = filter_var($_POST['email'],
        FILTER_SANITIZE_SPECIAL_CHARS);
    $password = htmlspecialchars($_POST['password']) ?? '';
    echo $email;
    echo $password;
    //send this to Database,etc..
    //We will talk about MySQL Database later
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport"
    content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form
        action="<?php echo
            htmlspecialchars($_SERVER['PHP_SELF']); ?>"
        method="POST"
        >
        <h3>Login to your account</h3>
        <div>
            <label for="name">Email:</label>
            <input type="text" name="email">
        </div>
        <div>
            <label for="password">Password:</label>
            <input type="password" name="password">
        </div>
        <input type="submit" value="Submit" name="submit">
    </form>
</body>
</html>