RobThree/tarpit.php

## tarpit.php
<?php
$response = <<<EOD
HTTP/1.1 {{status}}
Server: {{server}}
Date: {{gmdate}}
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Page Not Found</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        * {
            line-height: 1.2;
            margin: 0;
        }
        html {
            color: #888;
            display: table;
            font-family: sans-serif;
            height: 100%;
            text-align: center;
            width: 100%;
        }
        body {
            display: table-cell;
            vertical-align: middle;
            margin: 2em auto;
        }
        h1 {
            color: #555;
            font-size: 2em;
            font-weight: 400;
        }
        p {
            margin: 0 auto;
            width: 280px;
        }
        @media only screen and (max-width: 280px) {
            body, p {
                width: 95%;
            }
            h1 {
                font-size: 1.5em;
                margin: 0 0 0.3em;
            }
        }
    </style>
</head>
<body>
    <h1>Page Not Found</h1>
    <p>Sorry, but the page you were trying to view does not exist.</p>
</body>
</html>
<!-- IE needs 512+ bytes: http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx -->
EOD;

Tarpit($response, 5);

function Tarpit(string $response, float $totalseconds = 30) {
    // Gather all lines
    $lines = preg_split('/\r|\n/', $response, null, PREG_SPLIT_NO_EMPTY);
    // Calculate delay between output of each line in microseconds
    $wait = ceil(($totalseconds / (sizeof($lines)-1)) * 1e6);

    // We start with our output function initialized to header();
    $out = function($a) { header($a); };
    // Iterate all lines
    foreach ($lines as $line) {
        // If we encounter the doctype we switch from header-output to echo's.
        if (strcasecmp($line,'<!doctype html>') === 0)
            $out = function($a) { echo $a; };

        // Output (using our $out function) a line, replacing some {{placeholders}} with desired values
        $out(
            preg_replace_callback_array([
                '/{{(.*?)}}/' => function ($match) {
                    switch (strtolower($match[1])) {
                        case 'status':
                            return '200 OK'; // We explicitly serve as 200 OK since any decent bot will quit after receiving a 404 or any other status code and not wait for the rest of the response
                        case 'gmdate':
                            return gmdate('D, d M Y H:i:s T', time());
                        case 'server':
                            return $_SERVER['SERVER_SOFTWARE'];
                        default:
                            return null;
                    }
                }
            ], $line) . "\r\n"
        );
        // Flush output and sleep for a while
        ob_flush();
        usleep($wait);
    }
}
	<?php
	$response = <<<EOD
	HTTP/1.1 {{status}}
	Server: {{server}}
	Date: {{gmdate}}
	Content-Type: text/html; charset=UTF-8
	Transfer-Encoding: chunked
	Connection: keep-alive
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Page Not Found</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<style>
	* {
	line-height: 1.2;
	margin: 0;
	}
	html {
	color: #888;
	display: table;
	font-family: sans-serif;
	height: 100%;
	text-align: center;
	width: 100%;
	}
	body {
	display: table-cell;
	vertical-align: middle;
	margin: 2em auto;
	}
	h1 {
	color: #555;
	font-size: 2em;
	font-weight: 400;
	}
	p {
	margin: 0 auto;
	width: 280px;
	}
	@media only screen and (max-width: 280px) {
	body, p {
	width: 95%;
	}
	h1 {
	font-size: 1.5em;
	margin: 0 0 0.3em;
	}
	}
	</style>
	</head>
	<body>
	<h1>Page Not Found</h1>
	<p>Sorry, but the page you were trying to view does not exist.</p>
	</body>
	</html>
	<!-- IE needs 512+ bytes: http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx -->
	EOD;

	Tarpit($response, 5);

	function Tarpit(string $response, float $totalseconds = 30) {
	// Gather all lines
	$lines = preg_split('/\r\|\n/', $response, null, PREG_SPLIT_NO_EMPTY);
	// Calculate delay between output of each line in microseconds
	$wait = ceil(($totalseconds / (sizeof($lines)-1)) * 1e6);

	// We start with our output function initialized to header();
	$out = function($a) { header($a); };
	// Iterate all lines
	foreach ($lines as $line) {
	// If we encounter the doctype we switch from header-output to echo's.
	if (strcasecmp($line,'<!doctype html>') === 0)
	$out = function($a) { echo $a; };

	// Output (using our $out function) a line, replacing some {{placeholders}} with desired values
	$out(
	preg_replace_callback_array([
	'/{{(.*?)}}/' => function ($match) {
	switch (strtolower($match[1])) {
	case 'status':
	return '200 OK'; // We explicitly serve as 200 OK since any decent bot will quit after receiving a 404 or any other status code and not wait for the rest of the response
	case 'gmdate':
	return gmdate('D, d M Y H:i:s T', time());
	case 'server':
	return $_SERVER['SERVER_SOFTWARE'];
	default:
	return null;
	}
	}
	], $line) . "\r\n"
	);
	// Flush output and sleep for a while
	ob_flush();
	usleep($wait);
	}
	}