URL Monitor

urlmonitor.php

<?php
	function getHTTPStatusCode ($url) {
		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_NOBODY, true);

		curl_exec($ch);

		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

		curl_close($ch);

		return $code;
	}

	$expectations = array(
		'https://www.facebook.com/' => 200,
		'https://www.google.com/' => 302
	);

	$exceptions = array();

	foreach ($expectations as $url => $code) {
		$code2 = getHTTPStatusCode($url);

		if ($code !== $code2) {
			$exceptions[$url] = $code2;
		}
	}

	if (count($exceptions) !== 0) {
		$lines = array();

		foreach ($exceptions as $url => $code) {
			$lines[] = "$url, Expected = {$expectations[$url]}, Actual = $code";
		}

		mail('abc@xyz.com', 'URL Monitor Warning!', implode("\r\n", $lines));
	}
?>