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mrcgrtz/ping-example.html

Last active November 19, 2021 12:07
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Simple PHP script for mailing an HTML5 "ping"
Raw
ping-example.html
<!doctype html>
<meta charset="utf-8">
<title>Ping Test</title>
<p>Click this <a href="https://example.com" ping="/ping.php">test link</a>.
Raw
ping.php
<?php
declare(strict_types=1);
// Configuration: Set allowed host.
$host = 'https://my.host';
// Configuration: Set mail from/to.
$from = $_SERVER['SERVER_ADMIN'];
$to = $_SERVER['SERVER_ADMIN'];
// Get the Ping-From header value.
$headers = apache_request_headers() ?? [];
$url = $headers['Ping-From'] ?? '';
// Check for a valid ping from my host.
if (!empty($url) && str_starts_with($url, $host)) {
// Prepare the mail.
$subject = 'Ping';
$headers = [
'MIME-Version' => '1.0',
'Content-Type' => 'text/plain; charset="utf-8"',
'Content-Transfer-Encoding' => '8bit',
'From' => $from,
'X-Mailer' => 'PHP/' . phpversion(),
];
$body = implode("\r\n", [
'Ping from: ' . $url,
'Date/time: ' . strftime('%c'),
]);
// Mail the ping.
if (!mail($to, $subject, $body, $headers)) {
// Sending a mail did not work, respond with server error.
http_response_code(500);
exit();
}
// Sending the mail worked, a ping mail was created.
http_response_code(201);
exit();
}
// The request was bad.
http_response_code(400);
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