gistfile1.php

<?

echo "<pre>";

// This example should work but some http servers will not respond properly to a HEAD request
// i.e. google.com

$url = 'http://ericboehs.com/uploads/gahr-1.png';
$ch = curl_init();
if (!$ch)
	return false;

curl_setopt($ch, CURLOPT_URL, $url); //Set the url
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //Gets the server response
curl_setopt($ch, CURLOPT_HEADER, true); // Gets headers from server
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'HEAD');
$response = curl_exec($ch); //Execute the query and save the response
curl_close($ch); //Close the connection

$response = explode("\n",$response);

foreach($response as $line){
	if(strpos($line, "ontent-Length")) //Yes I know I forgot the C
		$content_length = trim(str_replace("Content-Length: ",'',$line));
}
echo "The file size is ".$content_length." bytes. <br />\n";

die('End of Example 1');

// This example doesn't work as the intention is to just get the header and fopen reads the whole
// file in at once.

$file = 'http://www.example.com/file.jpg';
 
$fp   = fopen( $file, 'r' );
$data = stream_get_meta_data($fp);
fclose($fp);
 
print_r($data);
die('End of Example 2');


// This example doesn't work as file_get_contents only supports seeking on certain file types.
// I've used file_get_contents to seek on a non-local file before.  Matter of fact it's running
// right now as a cronjob.

$url = 'http://ericboehs.com/uploads/gahr-1.png';
$file_position = 0;

$file_chunk = file_get_contents($url, NULL, NULL, $file_position, 100);

$i=0;
while(strpos($file_chunk, 'Content-Length') === FALSE || $i=10){
	$file_position += 100;
	$file_chunk = file_get_contents($url, NULL, NULL, $file_position, 100);
	echo $file_chunk."<br/>\n";
	$i++;
}

die('End of Example 3');