Form data print on the same page after submitting

 <html>

    <head>
        <title>Form Page</title>
    </head>
    <body>
        <form action="<?php echo $_SERVER["PHP_SELF"] ?>", method="post">
            Name: <input type="text" name="fname"><br><br>
            Age: <input type="text" name="age"><br><br>
            <input type="submit" name="save">
        </form>

        <?php
        if(isset($_POST["save"])) {
            echo $_POST["fname"] . "<br>";
            echo $_POST["age"] . "<br>";
        }
        ?>

    </body>
</html>



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