What potential issues can arise when using the filesize() function to determine the size of a remote file in PHP?

When using the filesize() function to determine the size of a remote file in PHP, potential issues can arise due to the function not being able to access remote files directly. To solve this issue, you can use alternative methods like cURL to fetch the remote file and then calculate its size. 

$url = 'https://www.example.com/remote-file.txt';

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);

$filesize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);

curl_close($ch);

echo "Remote file size: " . $filesize . " bytes";

Keywords

filesize remote file PHP HTTP network error

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