How to check if page exists?

Question

Possible Duplicate:
How can one check to see if a remote file exists using PHP?
How to check if a webpage exists. jQuery and/or PHP

How can I check if a page from a different domain exists using php or javascript?

I've tried this:

function getURL($url, $includeContents = false)
{
  if($includeContents)
    return @file_get_contents($url);

  return (@file_get_contents($url, null, null, 0, 0) !== false);
}


$test = getURL("http://www.google.com");

echo "<script language='javascript'>alert('$test');</script>";

but it doesn't work.

If I use a local url it works.

How to solve this?

or this one: http://stackoverflow.com/questions/1722613/check-if-a-remote-page-exists-using-php. — lvil, Feb 27 '12 at 15:20
@matino, I've tried what was there but only worked in the same domain. — aF., Feb 27 '12 at 15:21
c'mon 6,272 rep, suppressing errors `@` and then saying **it dont work** classic — Lawrence Cherone, Feb 27 '12 at 15:26
Exactly what doesn't work? Running your code I get this result: ``. — bos, Feb 27 '12 at 15:34

Shiplu Mokaddim · Answer 1 · 2012-02-27T15:32:31.613

2

it can not be done by pure Javascript.

In PHP, request the page and check if it has 200 http response code. This result can be returned to JS via ajax call so that JavaScript can show a message or do other action accordingly.

edited Feb 27 '12 at 15:32

answered Feb 27 '12 at 15:23

Shiplu Mokaddim

56,364
17
141
187

1

maybe with ajax. php handling the task returning response. – lvil Feb 27 '12 at 15:25

score 2 · Accepted Answer · answered Feb 27 '12 at 15:29

2

To read content from other pages i`m using CURL and do it like that

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
$page_content = curl_exec($ch);   
curl_close($ch); 
if ($page_content != "false") {
 // do something with content  
} else {
  // this page is not available
}

answered Feb 27 '12 at 15:29

Anton Sementsov

1,196
6
18
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Or just check the headers like in the mentioned dupe: http://stackoverflow.com/questions/981954/how-can-one-check-to-see-if-a-remote-file-exists-using-php `$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);` – Treffynnon Feb 27 '12 at 15:30

How to check if page exists?

2 Answers2