Having problems using this function twice on the same page;

Question

Okay so I'm trying to create a server status page on my website and I've been using the below function to see if a website is live or not. however when I try to do more than one search the response is always DOWN for the responses after the first one.

Visit Function

function Visit($url){
       $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();
       curl_setopt ($ch, CURLOPT_URL,$url );
       curl_setopt($ch, CURLOPT_USERAGENT, $agent);
       curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
       curl_setopt ($ch,CURLOPT_VERBOSE,false);
       curl_setopt($ch, CURLOPT_TIMEOUT, 5);
       curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);
       curl_setopt($ch,CURLOPT_SSLVERSION,3);
       curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);
       $page=curl_exec($ch);
       $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
       curl_close($ch);
       if($httpcode>=200 && $httpcode<300) return true;
       else return false;
}

index.php

if (Visit("http://twitter.com")){
       echo "OK";
}else{
       echo "DOWN";
}

if (Visit("http://google.com")){
       echo "OK";
       }else{
       echo "DOWN";
}

Error Log

[30-Jun-2016 12:11:10 UTC] PHP Warning:  fread() expects parameter 1 to be resource, boolean given in /public_html/blog/server-status.php on line 40
[30-Jun-2016 12:11:10 UTC] PHP Warning:  fclose() expects parameter 1 to be resource, boolean given in /public_html/blog/server-status.php on line 41

The 40th and 41st lines are;

   curl_setopt($ch, CURLOPT_USERAGENT, $agent);
   curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

The response given when executing the above scripts is OK DOWN even though google is up. I have tried with other links and all produce the same error.

Are you getting any errors? Are errors even on? Have you checked what code you're getting back? What attempts have you made to solve this so far? — Styphon, Jun 30 '16 at 12:30
Sorry yes I have just edited with the error log. I really don't know if the error log is relevant as it doesn't seem to be up to date but I just pulled the latest logs in the error_log file. — , Jun 30 '16 at 12:32
Take a look at [**How can I check if a URL exists via PHP?**](http://stackoverflow.com/questions/2280394/how-can-i-check-if-a-url-exists-via-php) — FirstOne, Jun 30 '16 at 12:40
Your error log and the lines you show seem unrelated. There is no calls to fread or fclose in those lines. — Gordon, Jun 30 '16 at 12:47

GiamPy · Accepted Answer · 2016-06-30T12:36:40.087

1

The reason why the function does not return true, it's because Google answers with a 302 Found HTTP code.

Same thing for Twitter, but it answers with a 301 instead.

You should check if the response was a redirect or not, and maybe return it accordingly.

This is what var_dump($httpcode) outputs;

I have attempted using Visit("https://www.google.it") and it works as it should.

edited Jun 30 '16 at 12:36

answered Jun 30 '16 at 12:35

GiamPy

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Okay yeah that does make sense, so I just have to find out what http code my site is producing when its live and not live and then alter my code to read that. Thankyou. – Jun 30 '16 at 12:39
1

@GiamPy did you try using the function more than once in the same document for two different urls – Jun 30 '16 at 12:40
Yes @LewisDay. http://puu.sh/pLnh2/58d976fb6b.png I tried `https://www.netflix.com/it/` and it works. You just need to be careful because 70% of the websites do redirects to the correct routes when you visit their index. Most have localization, some use HTTPS, some use WWW, etc. – GiamPy Jun 30 '16 at 12:42

Having problems using this function twice on the same page;

1 Answers1