Basic health status check using PHP curl

php-curl-status.php

<?php

$responseCode = 500;
$responseCodeOk = 200;
$responseCodeFail = 503;
$url = 'https://www.deathe.org/';

$ch = curl_init();

curl_setopt_array(
	$ch,
	array(
		CURLOPT_URL => $url,
		CURLOPT_FOLLOWLOCATION => true,
		CURLOPT_USERAGENT => 'Custom Status Check',
		CURLOPT_CONNECTTIMEOUT => 5,
		CURLOPT_TIMEOUT => 10,
		CURLOPT_NOBODY => true,
		CURLOPT_HTTPGET => true,
		CURLOPT_RETURNTRANSFER => true
	)
);

curl_exec(
	$ch
);

if (
	curl_errno(
		$ch
	) === 0
) {
	$responseCode = curl_getinfo(
		$ch,
		CURLINFO_RESPONSE_CODE
	);
}

curl_close(
	$ch
);

header(
	'Cache-Control: no-cache'
);
header(
	'Content-Type: text/plain'
);

if (
	preg_match(
		'/^[23][0-9]{2}/',
		$responseCode
	) !== 1
) {
	http_response_code(
		$responseCodeFail
	);
	exit;
}

http_response_code(
	$responseCodeOk
);
print 'OK';