PHP Lesson (2023-March-8)

<!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>PHP Tuto</title> </head>   <body>     <form action=“<?php echo htmlspecialchars($_SERVER[“PHP_SELF”]); ?>“ method=“post”> Age: <input type=“number” name=“age”><br><br> <input type=“submit”><br><br>     </form>     <?php     if ($_SERVER[“REQUEST_METHOD”] == “POST”) { […]

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