Mine

<html>
<head>
<title>form</title>
<body>

<?php 

if ($_GET['action'] == 'send'){

echo('Data = '.$_GET['keyword']);

}

?>

<form method="get" action="get_post.php">
<fieldset>
<legend>form data</legend>
<p>
<label for="keyword">Search Keyword:</label>
<input type="text" name="keyword:" size="25" />
</p>
<p>
<input type="submit" name="action" value="send" />
<p>
</fieldset>
<form>
</body>
</html>