我正在寻找可以在我的网络主机上作为cron作业运行的PHP脚本。它需要运行一个网站列表并检查以确保每个网站都返回Http响应200 OK。如果某个网站没有返回该回复，或者无法恢复，则需要向网站管理员发送电子邮件。
答案 0 :(得分：3)
我已经改进了这个脚本，以检查您的网站/网络服务器是否仍然正常运行。我稍微改进了错误处理，并添加了一封舒适的电子邮件，让您知道该脚本已成功运行。
舒适电子邮件依赖另一个名为healthcheck.txt的文件来存储一些值，直到下次运行脚本为止。如果没有自动创建，只需创建一个0字节的文本文件，上传它并在其上设置正确的文件权限（读/写）。
<?php
// set email server parameters
ini_set('sendmail_from', 'server.status@host.example.com' );
ini_set('SMTP', '127.0.0.1' );
ini_set('smtp_port', '25' );
ini_set('allow_url_fopen', true); //enable fopen
// define list of webservers to check
$webservers = array('www.example.com', 'www.example2.com');
function sendemail($subject,$message) // email function using standard php mail
{
$wrapmessage = wordwrap($message,70,"\n",true); // mail function can't support a message more than 70 characters per line
$to = 'you@example.com'; // who to send the emails to
// Headers ensure a properly formatted email
$headers = 'From: server.status@host.example.com' . "\r\n" .
'Reply-To: server.status@host.example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
return mail($to, $subject, $wrapmessage, $headers); //send the email
}
function getresponse($url) //queries a url and provides the header returned and header response
{
$ch = curl_init(); // create cURL handle (ch)
if (!$ch) { // send an email if curl can't initialise
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url.". Curl did not initialise correctly and issued the error - ".curl_error($ch)." The script has died and not completed any more tasks.";
sendemail($subject,$message);
die();
}
// set some cURL options
$ret = curl_setopt($ch, CURLOPT_URL, "http://".$url."/");
$ret = curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
$ret = curl_setopt($ch, CURLOPT_HEADER, true);
$ret = curl_setopt($ch, CURLOPT_NOBODY, true);
$ret = curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$ret = curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
$ret = curl_setopt($ch, CURLOPT_TIMEOUT, 30);
// execute
$ret = curl_exec($ch);
if (empty($ret)) {
// some kind of an error happened
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url.". Curl was trying to execute and issued the error - ".curl_error($ch)." Further URLs will be tried.";
sendemail($subject,$message);
curl_close($ch); // close cURL handler
} else {
$info = curl_getinfo($ch); //get header info - output is an array
curl_close($ch); // close cURL handler
if (empty($info['http_code'])) {
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url."\r\nNo HTTP code was returned";
sendemail($subject,$message);
} else {
// load the HTTP code descriptions
$http_codes = parse_ini_file("/server/path/to/http-response-codes.ini");
// results - code number and description
$result = $info['http_code'] . " " . $http_codes[$info['http_code']];
return $result; // $result contained a code, so return it
}
return None; //$info was empty so return nothing
}
return None; // $ret was empty so return nothing
}
// this bit of code initiates the checking of the web server
foreach ($webservers as $webserver) { //loop through the array of webservers
$status = getresponse($webserver); //get the status of the webserver
if (empty($status)) {
// nothing happens here because if $status is empty, the function returned nothing and an email was already sent.
} else {
if (strstr($status, "200")) { //search for the error code that means everything is ok
// If found, don't do anything, just process the next one
} else {
$timestamp = date("m/d/Y H:i:s a", time()); //get the current date and time
$error = $webserver." - ".$status." status error detected"; //set error message with server and response code
$message = "At - ".$timestamp." - a http response error was detected on ".$webserver.".\r\nInstead of a 200 OK response, the server returned ".$status."\r\nThis requires immediate attention!"; //At what time was an error detected on which server and what was the error message
sendemail($error,$message); //trigger the sendemail function
}
}
}
// Health Check. Comfort email twice a day to show script is actually running.
$healthfile = "/server/path/to/healthcheck.txt"; // path with the name of the file to store array data
$hfsize = filesize($healthfile); // filesize of healthcheck file
$notify = "16:00"; // specify the earliest time in the day to send the email - cron job settings dictate how close you'll get to this
$datenow = date("d-m-Y"); //what is current date as of now
if (file_exists($healthfile) && $hfsize !== 0) { //read contents of array from file if it exists and has data, otherwise create array with some defaults
$valuestor = unserialize(file_get_contents($healthfile));
} else { // file doesn't exist so we'll create an array with some defaults
$valuestor = array("email_sent"=>0, "sent_date"=>$datenow, "iterations"=>0);
}
$i = $valuestor['iterations']; //get the iterations number from the valuestor array
$curdate = strtotime($datenow); //convert current date to seconds for comparison
$stordate = strtotime($valuestor['sent_date']); //convert stored date to seconds
if ($valuestor['email_sent'] == 1) { // has the email already been sent today
if ($curdate == $stordate) { // if it has, is the current date equal to the stored date
$i++; // yes it is, just increment the iterations
} else { // it's a new day, reset the array
$timestamp = date("m/d/Y H:i:s a", time()); //get the current date and time
$subject = "Web Server Checking Script Health Status"; //set email subject line
$message = "Message created: ".$timestamp."\r\nThe Web Server Checking script ran successfully for ".$i." time(s) on the ".$valuestor['sent_date']; //email message
sendemail($subject,$message); //trigger the sendemail function
$valuestor['email_sent'] = 0; // set email sent to false
$valuestor['sent_date'] = $datenow; // set email send date to today
$i = 1; // this is the first time the script has run today, so reset i to 1. It gets written to the array later.
// echo $message;
}
} else { // email has not been sent today
$checktime = strtotime($notify); //convert $notify time (for current date) into seconds since the epoch
if (time() >= $checktime) { // are we at or have we gone past checktime
$i++; // increase the number of script iterations by 1
$timestamp = date("m/d/Y H:i:s a", time()); //get the current date and time
$subject = "Web Server Checking Script Health Status"; //set email subject line
$message = "Message created: ".$timestamp."\r\nThe Web Server Checking script has successfully run and completed ".$i." time(s) today."; //email message
sendemail($subject,$message); //trigger the sendemail function
$valuestor['email_sent'] = 1; // set array to show that email has gone
// echo $message;
} else { // we haven't reached the check time yet
$i++; // just increment the iterations
}
}
$valuestor['iterations'] = $i; // update the array with the iterations number
// save the array to the file again
$fp = fopen($healthfile, 'w+'); // open or create the file, clear its contents and write to it
if (!$fp) { // handle the error with an email if the file won't open
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when trying to open or create the file ".$healthfile." The script was ended without any new information being stored.";
sendemail($subject,$message);
} else {
fwrite($fp, serialize($valuestor)); // write to the file and serialise the array valuestor
fclose($fp); // close the file connection
}
die(); // make sure that script dies and cron job terminates
?>
答案 1 :(得分：1)
我发现我花了一些时间来研究这个问题的一个好答案。所以为了社区的利益，这是我在研究Stackoverflow和其他论坛后想出来的。
您需要两个文件才能生效。您通过cron执行的PHP脚本和一个包含http响应代码含义的详细说明的ini文件。
我希望这对别人有用。
服务器check.php
<?php
// set email server parameters
ini_set('sendmail_from', 'server.status@host.example.com' );
ini_set('SMTP', '127.0.0.1' );
ini_set('smtp_port', '25' );
// define list of webservers to check
$webservers = array('www.example.com', 'www.example2.com');
function sendemail($subject,$message) // email function using standard php mail
{
$wrapmessage = wordwrap($message,70,"\n",true); // mail function can't support a message more than 70 characters per line
$to = 'you@example.com'; // who to send the emails to
// Headers ensure a properly formatted email
$headers = 'From: server.status@host.example.com' . "\r\n" .
'Reply-To: server.status@host.example.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
return mail($to, $subject, $wrapmessage, $headers); //send the email
}
function getresponse($url) //queries a url and provides the header returned and header response
{
$ch = curl_init(); // create cURL handle (ch)
if (!$ch) {
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url."\r\nCouldn't initialize a cURL handle";
sendemail($subject,$message);
die();
}
// set some cURL options
$ret = curl_setopt($ch, CURLOPT_URL, "http://".$url."/");
$ret = curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
$ret = curl_setopt($ch, CURLOPT_HEADER, true);
$ret = curl_setopt($ch, CURLOPT_NOBODY, true);
$ret = curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$ret = curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
$ret = curl_setopt($ch, CURLOPT_TIMEOUT, 30);
// execute
$ret = curl_exec($ch);
if (empty($ret)) {
// some kind of an error happened
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url."\r\ncurl_error ".$ch;
sendemail($subject,$message);
curl_close($ch); // close cURL handler
die();
} else {
$info = curl_getinfo($ch);
curl_close($ch); // close cURL handler
if (empty($info['http_code'])) {
$subject = "Web Server Checking Script Error";
$message = "The web server checking script issued an error when it tried to process ".$url."\r\nNo HTTP code was returned";
sendemail($subject,$message);
die();
} else {
// load the HTTP codes
$http_codes = parse_ini_file("/server/path/to/http-response-codes.ini");
// results
$result = $info['http_code'] . " " . $http_codes[$info['http_code']];
}
}
return $result;
}
foreach ($webservers as $webserver) { //loop through the array of webservers
$status = getresponse($webserver); //get the status of the webserver
if (strstr($status, "200")) { //search for the error code that means everythings ok
return None; // Don't do anything, just process the next one
} else {
$timestamp = date("m/d/Y H:i:s a", time()); //get the current date and time
$error = $webserver." - ".$status." status error detected"; //set error message with server and response code
$message = "At - ".$timestamp." - a http response error was detected on ".$webserver.".\r\nInstead of a 200 OK response, the server returned ".$status."\r\nThis requires immediate attention!"; //At what time was an error detected on which server and what was the error message
sendemail($error,$message); //trigger the sendemail function
}
}
?>
HTTP的响应codes.ini
[Informational 1xx]
100="Continue"
101="Switching Protocols"
[Successful 2xx]
200="OK"
201="Created"
202="Accepted"
203="Non-Authoritative Information"
204="No Content"
205="Reset Content"
206="Partial Content"
[Redirection 3xx]
300="Multiple Choices"
301="Moved Permanently"
302="Found"
303="See Other"
304="Not Modified"
305="Use Proxy"
306="(Unused)"
307="Temporary Redirect"
[Client Error 4xx]
400="Bad Request"
401="Unauthorized"
402="Payment Required"
403="Forbidden"
404="Not Found"
405="Method Not Allowed"
406="Not Acceptable"
407="Proxy Authentication Required"
408="Request Timeout"
409="Conflict"
410="Gone"
411="Length Required"
412="Precondition Failed"
413="Request Entity Too Large"
414="Request-URI Too Long"
415="Unsupported Media Type"
416="Requested Range Not Satisfiable"
417="Expectation Failed"
[Server Error 5xx]
500="Internal Server Error"
501="Not Implemented"
502="Bad Gateway"
503="Service Unavailable"
504="Gateway Timeout"
505="HTTP Version Not Supported"