CODEWITHSUNDEEP
php
Elitmiar
Elitmiar

Reputation: 36839

How to check if a file exist on an external server

How to check if a file exist on an External Server? I have a url "http://logs.com/logs/log.csv" and I have an script on another server to check if this file exists. I tried 

$handle = fopen("http://logs.com/logs/log.csv","r");
if($handle === true){
return true;
}else{
return false;
}

and

if(file_exists("http://logs.com/logs/log.csv")){
return true;
}else{
return false;
}

These methos just do not work

Upvotes: 9

Views: 19007

Answers (5)

Rimski
Rimski

Reputation: 23

Requesting only headers will be much faster. I use this:

function isItAlive($url){ 
    stream_context_set_default(
        array(
            'ssl' => [
                'verify_peer' => false,
                'verify_peer_name' => false,
            ],
            'http' => array(
                'method' => 'HEAD'
            )
        )
      );
    $headers = @get_headers($url);
    $status = substr($headers[0], 9, 3);
    return ($status >= 200 && $status < 300 )?true:false;
}

Upvotes: 0

kipzes
kipzes

Reputation: 714

function checkExternalFile($url)
{
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_exec($ch);
    $retCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    return $retCode;
}

$fileExists = checkExternalFile("http://example.com/your/url/here.jpg");

// $fileExists > 400 = not found
// $fileExists = 200 = found.

Upvotes: 14

Sarfraz
Sarfraz

Reputation: 382696

This should work:

$contents = file_get_contents("http://logs.com/logs/log.csv");

if (strlen($contents))
{
  return true; // yes it does exist
}
else
{
  return false; // oops
}

Note: This assumes file is not empty

Upvotes: 2

Adam Kiss
Adam Kiss

Reputation: 11859

  <?php
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 4file dir);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 10);

    $data = curl_exec($ch);
    curl_close($ch);

    preg_match_all("/HTTP\/1\.[1|0]\s(\d{3})/",$data,$matches); //check for HTTP headers

    $code = end($matches[1]);

    if(!$data) 
    {
        echo "file could not be found";
    } 
    else 
    {
        if($code == 200) 
        {
            echo "file found";
        } 
        elseif($code == 404) 
        {
            echo "file not found";
        }
    }
  ?>

Upvotes: 1

Skilldrick
Skilldrick

Reputation: 70819

  1. Make sure error reporting is on.

  2. Use if($handle)

  3. Check allow_url_fopen is true.

  4. If none of this works, use this method on the file_exists page.

Upvotes: 3

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