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| function test_image($url)
{
$vartemp="http://thumbnails.alexa.com/image_server.cgi?size=large&url=$url";
$tableau = explode("/",$url);
$fichier=$url."/ascreen.jpg";
if(isset($tableau[3]))
{
$fichier=$url."ascreen.jpg";
}
if(remote_file_exists ($fichier))
{
$size=taille_fichier($fichier);
if(($size)<=4000)
{
return ($fichier);
}
else
{
return $vartemp;
}
}
elseif(remote_file_exists($vartemp))
{
return $vartemp;
}
}
function remote_file_exists ($url)
{
/*
Return error codes:
1 = Invalid URL host
2 = Unable to connect to remote host
*/
$head = "";
$url_p = parse_url ($url);
if (isset ($url_p["host"]))
{ $host = $url_p["host"]; }
else
{ return 1; }
if (isset ($url_p["path"]))
{ $path = $url_p["path"]; }
else
{ $path = ""; }
$fp = fsockopen ($host, 80, $errno, $errstr, 20);
if (!$fp)
{ return 2; }
else
{
$parse = parse_url($url);
$host = $parse['host'];
fputs($fp, "HEAD ".$url." HTTP/1.1\r\n");
fputs($fp, "HOST: ".$host."\r\n");
fputs($fp, "Connection: close\r\n\r\n");
$headers = "";
while (!feof ($fp))
{ $headers .= fgets ($fp, 128); }
}
fclose ($fp);
$arr_headers = explode("\n", $headers);
$return = false;
if (isset ($arr_headers[0]))
{ $return = strpos ($arr_headers[0], "404") === false; }
return $return;
}
function taille_fichier($url)
{
$buffer = '';
if($fd = fopen ($url, "r")) {
while (!feof($fd)) {
$buffer .= fgets($fd, 4096);
}
fclose ($fd);
}
$size = strlen($buffer);
return $size; |
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