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<html>
<head>
<meta charset="utf-8">
<title>tutorialpro.org(tutorialpro.org)</title>
</head>
<body>

<form action="welcome.php" method="post">
Name: <input type="text" name="fname">
Age: <input type="text" name="age">
<input type="submit" value="Submit">
</form>

</body>
</html>

Welcome <?php echo $_POST["fname"]; ?>!<br>
Your age is <?php echo $_POST["age"]; ?> years old.

<?php
$q = isset($_GET['q'])? htmlspecialchars($_GET['q']) : '';
if($q) {
        if($q =='tutorialpro') {
                echo 'tutorialpro.org<br>http://www.tutorialpro.org';
        } else if($q =='GOOGLE') {
                echo 'Google Search<br>http://www.google.com';
        } else if($q =='TAOBAO') {
                echo 'Taobao<br>http://www.taobao.com';
        }
} else {
?><form action="" method="get"> 
    <select name="q">
    <option value="">Select a site:</option>
    <option value="tutorialpro">tutorialpro</option>
    <option value="GOOGLE">Google</option>
    <option value="TAOBAO">Taobao</option>
    </select>
    <input type="submit" value="Submit">
    </form><?php
}
?>

<?php
$q = isset($_POST['q'])? $_POST['q'] : '';
if(is_array($q)) {
    $sites = array(
            'tutorialpro' => 'tutorialpro.org: http://www.tutorialpro.org',
            'GOOGLE' => 'Google Search: http://www.google.com',
            'TAOBAO' => 'Taobao: http://www.taobao.com',
    );
    foreach($q as $val) {
        // PHP_EOL is a constant for newline
        echo $sites[$val] . PHP_EOL;
    }
}
?>

} else {
?><form action="" method="post"> 
    <select multiple="multiple" name="q[]">
    <option value="">Select a site:</option>
    <option value="tutorialpro">tutorialpro</option>
    <option value="GOOGLE">Google</option>
    <option value="TAOBAO">Taobao</option>
    </select>
    <input type="submit" value="Submit">
    </form><?php
}
?>