<pre> 
&lt;html>
&lt;head>
&lt;title>HTTP related PHP variables&lt;/title>
&lt;/head>
&lt;body bgcolor=lightyellow>
&lt;h1 align=center>HTTP related PHP variables&lt;/h1>
&lt;br>&lt;br>

&lt;form method=post action=&lt;?php echo $_SERVER['PHP_SELF'] ?> >
&lt;input type=hidden name=hiddenField value=secret>
&lt;input type=submit value="HTTP Vars">
&lt;/form>

&lt;?php include "../include.php"; ?>		&lt;!-- hyperlink to see the code -->

&lt;?php

    error_reporting(E_ALL & ~E_NOTICE & ~E_WARNING);            //all errors except notices and warnings

    print "&lt;b>The _GET Variables&lt;/b>&lt;br>";
    foreach($_GET as $name => $value)
	print "&lt;br>&lt;b> $name  = &lt;/b> $value ";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The _POST Variables&lt;/b>&lt;br>";
    foreach($_POST as $name => $value)
	print "&lt;br>&lt;b> $name  = &lt;/b> $value ";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The _COOKIE Variables&lt;/b>&lt;br>";
    foreach($_COOKIE as $name => $value)
	print "&lt;br>&lt;b> $name  = &lt;/b> $value ";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The _REQUEST Variables&lt;/b>&lt;br>";
    foreach($_REQUEST as $name => $value)
	print "&lt;br>&lt;b> $name  = &lt;/b> $value ";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The Request Headers&lt;/b>&lt;br>";
    print "&lt;br>&lt;b>HTTP_ACCEPT:         &lt;/b> $_SERVER[HTTP_ACCEPT]";
    print "&lt;br>&lt;b>HTTP_ACCET_ENCODING: &lt;/b> $_SERVER[HTTP_ACCEPT_ENCODING]";
    print "&lt;br>&lt;b>HTTP_ACCEPT_LANGUAGE:&lt;/b> $_SERVER[HTTP_ACCEPT_LANGUAGE]";
    print "&lt;br>&lt;b>HTTP_CONNECTION:     &lt;/b> $_SERVER[HTTP_CONNECTION]";
    print "&lt;br>&lt;b>HTTP_COOKIE:         &lt;/b> $_SERVER[HTTP_COOKIE]";
    print "&lt;br>&lt;b>HTTP_HOST:           &lt;/b> $_SERVER[HTTP_HOST]";
    print "&lt;br>&lt;b>HTTP_REFERER:        &lt;/b> $_SERVER[HTTP_REFERER]";
    print "&lt;br>&lt;b>HTTP_USER_AGENT:     &lt;/b> $_SERVER[HTTP_USER_AGENT]";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The Response Headers&lt;/b>&lt;br>";
    $headers = headers_list();
    foreach($headers as $header)
	print "&lt;br> $header ";
    print "&lt;br>&lt;br>&lt;hr>";

    print "&lt;b>The _SERVER Variables&lt;/b>&lt;br>";
    foreach($_SERVER as $name => $value)
	print "&lt;br>&lt;b> $name  = &lt;/b> $value ";
    print "&lt;br>&lt;br>&lt;hr>";

?>

&lt;/body>
&lt;/html>

</pre>