如何使用php压缩另一个网站目录中的某些文件

Question

I want to create a zip file, the content of the file was retrieved from another website. For example I have file:

http://examples.com/path/file.txt

and I want to download file.txt as a zip file. I tried with file_get_contents(); but it's not working.

$content = file_get_contents(http://examples.com/path/file.txt);
$zip = new ZipArchive;
$res = $zip->open('config.zip', ZipArchive::CREATE);
if ($res === TRUE) {
    $zip->addFromString(file.txt, $content);
    $zip->close();
    echo 'OK';
} else {
    echo 'Failed';
}

I think it will get the content of file.txt, and create a compressed zip file, but when i open the output file it is not (incomplete sentence).

Answer 1

I would rather use gzencode() if you need just 1 file compression :

// dump & compress
$file = '/tmp/image.png.gz';
$content = file_get_contents('https://dummyimage.com/600x400/aff/bbb');
$compr = gzencode($content, 9);
file_put_contents($file, $compr);

// download
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);

Keep in mind that there can be various file permissions / isolation problems. For example by default Ubuntu isolates /tmp folder for a PHP process. If you want /tmp folder for a PHP process to be global - you must set PrivateTmp feature to FALSE.