我的PHP zip函数使用了太多内存

Question

I am trying to use the function below to zip up a file that is 551 mb, but there is not memory for it to run. I have used it to zip up other file and it works fine so I think it has to do with the size of the file.

    function Zip($source, $destination)
{
    global $latest_filename;
    if (!extension_loaded('zip') || !file_exists($source)) {
        return false;
    }

    $zip = new ZipArchive();
    if (!$zip->open($destination, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)) {
        return false;
    }

    $source = str_replace('\\', '/', realpath($source));

    if (is_dir($source) === true) {
        $files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);

        foreach ($files as $file) {
            $file = str_replace('\\', '/', realpath($file));

            if (is_dir($file) === true) {
                $zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
            } else if (is_file($file) === true) {
                $zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
            }
        }
    } else if (is_file($source) === true) {
        $zip->addFromString(basename($source), file_get_contents($source));
    }

    return $zip->close();
}

Here is the error I recieve:

Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to  allocate 577311064 bytes)

Thanks for any help with this.

Answer 1

Thank you for all of your reponses to this question , What I decided to do was to create a new zipping function that did not use 'file_get_contents' as this was using up all of the memory.

Here is my new function

function zip2 ($zipname){

    $zip = new ZipArchive();

    $zip->open("" .$zipname. ".zip", ZipArchive::CREATE);

    $files = scandir("" .$zipname. "");
    unset($files[0], $files[1]);

    foreach ($files as $file){
        $zip->addFile("" .$zipname. "/{$file}");
    }
    $zip->close();
}

Thanks

Colin